GB/T20878-2007 Stainless steel grades and chemical composition standards
national standards of People's Republic of China
GB/T 20878-2007 (replaces GB/T4229-1984)
Stainless steel and heat-resistant steel grades - chemical composition
1 Scope
This standard specifies the standard grades of stainless steel and heat-resistant steel and their chemical compositions (see Tables 1 to 5), and lists the physical parameters, characteristics and uses of some grades and a comparison table with foreign standard grades in the form of an appendix.
The grades and chemical composition limits specified in this standard are applicable to the formulation of product standards for rolled stainless steel and heat-resistant steel (including ingots and semi-finished products).
2 Terms and Definitions
This standard uses the following terms and definitions.
2.1
Stainless steel is steel with stainless and corrosion-resistant properties as its main characteristics, and a chromium content of at least 10.5% and a maximum carbon content of no more than 1.2%.
2.1.1
Austenitic grade stainless steel
The matrix is mainly composed of austenite (Y phase) with a face-centered cubic crystal structure, non-magnetic, and is mainly strengthened by cold working.
2.1.2
Austenitic -ferritic (duplex) grade stainless steel
The matrix has both austenite and ferrite phases (the content of the lesser phase is generally greater than 15%), and the stainless steel can be strengthened by cold working.
2.1.3
Ferritic stainless steel
The matrix is mainly composed of ferrite structure ( a phase) with a body-centered cubic crystal structure. It is magnetic and generally cannot be hardened by heat treatment, but cold working can make it slightly strengthened.
2.1.4
Martensitic grade stainless steel
The matrix is martensitic, magnetic, and the mechanical properties of the steel can be adjusted through heat treatment.
2.1.5
Precipitation hardening grade stainless steel
Stainless steel with an austenite or martensite matrix that can be hardened (strengthened) by precipitation hardening treatment (also known as aging hardening).
2.2
Heat -resistant steel
Steel with good chemical resistance or higher strength at high temperatures.
3. General criteria for determining chemical composition limits
3.1 Carbon
When the carbon content is not less than 0.03%, it is recommended to take two decimal places; when the carbon content is not more than 0.030%, it is recommended to take three decimal places.
3.2 Manganese
2% and 1% (maximum) are recommended for austenitic steels and other grades, except Cr-Ni-Mn grades, but not including free-cutting steels containing high sulfur or selenium or grades that require increased nitrogen solid solubility.
3.3 Phosphorus
Unless the manufacturer recommends a lower limit value due to technical reasons, austenitic stainless steel is recommended to use ≤ 0.045% , and other grades use ≤ 0.040% .
3.4 Sulfur
Unless a lower limit value is specified for special technical reasons, it is recommended to use ≤0.030 % for all grades , except free-cutting steel grades.
3.5 Silicon
The recommended concentration for flat products and pipes is ≤0.75%, and the recommended concentration for long strips and forgings is ≤1.00%. For grades that produce both long strips and flat products, the recommended concentration is 1.00%. Whether to use the lower or higher limit value is determined by the special requirements of the specific product.
3.6 Chrome
A composition spread of 2% is recommended; existing broader limits were not reduced to less than a 3% spread
3.7 Nickel
Unless a wider composition range (generally higher content) is required due to special technical requirements, the upper and lower limits of the composition are recommended not to exceed 3%.
3.8 Molybdenum
Unless a wider composition range is required due to special technical requirements, the upper and lower limits of the composition are recommended to be no more than 1%. Except for special technical requirements, the molybdenum content should generally be specified with upper and lower limits.
3.9 Nitrogen
Except for special technical requirements, the nitrogen content should generally be specified with upper and lower limits.
3.10 Copper
Except for special technical requirements, the copper content should generally have upper and lower limits.
3.11 Niobium and Tantalum
Unless there is a special application requiring the inclusion of tantalum, when two elements are listed at the same time (i.e. niobium + tantalum), it is recommended to include only niobium.
Note: Cb (columbium) and Nb (niobinm) represent the same element. Nb (niobinm) is generally used in Chinese standards.
4 Chemical composition and application of standard stainless steel grades
4.1 Standard grades of stainless steel are classified according to metallurgical classification, namely austenitic, austenitic - ferritic, ferritic, martensitic and precipitation hardening types.
Table 1 shows the standard grades of austenitic stainless steel and their chemical compositions;
Table 2 shows the standard grades and chemical compositions of austenitic - ferritic stainless steel;
Table 3 shows the standard grades of ferritic stainless steel and their chemical compositions;
Table 4 shows the standard grades and chemical compositions of martensitic stainless steel;
Table 5 shows the standard grades and chemical compositions of precipitation hardening stainless steel.
4.2 The chemical composition in this standard is not a requirement for the chemical composition of any product before it is adopted by the product standard.
4.3 If possible, the chemical composition of a grade should be unified between various stainless steel product standards. The chemical composition limits specified in this standard are a guide for determining the limit values of each element in the total composition of each grade. Chapter 3 lists the general criteria for determining the limit values of each element, and the chemical composition limits specified in this standard are determined based on these criteria.
4.4 Due to special technical influences, the requirements of product standards may be slightly changed. It is allowed to appropriately adjust the chemical , or to make special restrictions on the content of residual elements and harmful impurities.
Table 1: Standard grades and chemical compositions of austenitic stainless steel
Serial number | New grades | Old brand | Chemical composition (mass fraction), % | ||||||||||
C | Si | Mn | P | S | Ni | Cr | Mo | Cu | N | Other elements | |||
1 | 15Cr17Mn6Ni5N | 1Cr17Mn6Ni5N | 0.150 | 1.00 | 5.50-7.50 | 0.045 | 0.030 | 3.50-5.50 | 16.00-18.00 | – | – | 0.05-0.25 | – |
2 | 15Cr18Mn8Ni5N | 1Cr18Mn8Ni5N | 0.150 | 1.00 | 7.50-10.50 | 0.045 | 0.030 | 4.00-6.00 | 17.00-19.00 | – | – | 0.05-0.25 | – |
3 | 20Cr13Mn9Ni4 | 2Cr13Mn9Ni4 | 0.15-0.30 | 0.80 | 8.00-10.00 | 0.045 | 0.025 | 3.70-5.00 | 12.00-14.00 | – | – | – | – |
4 | 20Cr15Mn15Ni2N | 2Cr15Mn15Ni2N | 0.15-0.25 | 1.00 | 14.00-16.00 | 0.045 | 0.030 | 1.50-3.00 | 14.00-16.00 | – | – | 0.15-0.30 | – |
5 | 53Cr21Mn9Ni4N(a) | 5Cr21Mn9Ni4N(a) | 0.48-0.58 | 0.35 | 8.00-10.00 | 0.040 | 0.030 | 3.25-4.50 | 20.00-22.00 | – | – | 0.35-0.50 | – |
6 | 26Cr18Mn12Si2N(a) | 3Cr18Mn12Si2N(a) | 0.22-0.30 | 1.40-2.20 | 10.50-12.50 | 0.045 | 0.030 | – | 17.00-19.00 | – | – | 0.22-0.33 | – |
7 | 22Cr20Mn9Ni2Si2N(a) | 2Cr20Mn9Ni2Si2N(a) | 0.17-0.26 | 1.80-2.70 | 8.50-11.00 | 0.045 | 0.030 | 2.00-3.00 | 18.00-21.00 | – | 0.20-0.30 | – | |
8 | 15Cr17Ni7 | 1Cr17Ni7 | 0.150 | 1.00 | 2.00 | 0.045 | 0.030 | 6.00-8.00 | 16.00-18.00 | – | – | 0.10 | – |
9 | 03Cr17Ni7 | 0.030 | 1.00 | 2. 00 | 0.045 | 0.030 | 6. 00-8. 00 | 16. 00-18. 00 | – | – | 0.20 | – | |
10 | 03Cr17Ni7N | 0.030 | 1.00 | 2. 00 | 0.045 | 0.030 | 6. 00-8. 00 | 16. 00-18. 00 | – | – | 0.07-0.20 | – | |
11 | 17Cr18Ni9 | 2Cr18Ni9 | 0.13-0.21 | 1.00 | 2.00 | 0.045 | 0.025 | 8.00-10.50 | 17.00-19.00 | – | – | – | – |
12 | 15Cr18Ni9 | 1Cr18Ni9 | 0.150 | 1.00 | 2.00 | 0.045 | 0.030 | 8.00-10.00 | 17.00-19.00 | – | – | 0.10 | – |
13 | 15Cr18Ni9Si3(a) | 1Cr18Ni9Si3(a) | 0.150 | 2.00-3.00 | 2.00 | 0.045 | 0.030 | 8.00-10.00 | 17.00-19.00 | – | – | 0.10 | – |
14 | Y15Cr18Ni9 | Y1Cr18Ni9 | 0.150 | 1.00 | 2.00 | 0.020 | 30.150 | 8.00-10.00 | 17.00-19.00 | (c) | – | – | – |
15 | Y15Cr18Ni9Se | Y1Cr18Ni9Se | 0.150 | 1.00 | 2.00 | 0.020 | 0.060 | 8.00-10.00 | 17.00-19.00 | – | – | – | Se≥0.15 |
16 | 08Cr19Ni9(a) | 0Cr18Ni9(a) | 0.080 | 1.00 | 2.00 | 0.045 | 0.030 | 8.00-11.00 | 18.00-20.00 | – | – | – | – |
17 | 03Cr19Ni10 | 00Cr19Ni10 | 0.030 | 1.00 | 2.00 | 0.045 | 0.030 | 8.00-12.00 | 18.00-20.00 | – | – | – | – |
18 | 07Cr19Ni9 | 0.04-0.10 | 1.00 | 2.00 | 0.045 | 0.030 | 8.00-10.50 | 18.00-20.00 | – | – | – | – | |
19 | 05Cr19Ni10Si2NbN | 0.04-0.06 | 1.00-2.00 | 0.80 | 0.045 | 0.030 | 9.00-10.00 | 18.00-19.00 | – | – | 0.12-0.18 | Nb 0.03-0.08 | |
20 | 08Cr18Ni9Cu2 | 0Cr18Ni9Cu2 | 0.080 | 1.00 | 2.00 | 0.045 | 0.030 | 8.00-10.50 | 17.00-19.00 | – | 1.00- 3.00 | – | – |
twenty one | 08Cr18Ni9Cu4 | 0Cr18Ni9Cu3 | 0.080 | 1.00 | 2.00 | 0.045 | 0.030 | 8.50-10.50 | 17.00-19.00 | – | 3.00- 4.00 | – | – |
twenty two | 08Cr19Ni9N | 0Cr19Ni9N | 0.080 | 1.00 | 2.00 | 0.045 | 0.030 | 8.00-11.00 | 18.00-20.00 | – | – | 0.10-0.16 | – |
twenty three | 08Cr19Ni9NbN | 0Cr19Ni10NbN | 0.080 | 1.00 | 2.00 | 0.045 | 0.030 | 7.50-10.50 | 18.00-20.00 | – | – | 0.15-0.30 | Nb≥0.15 |
twenty four | 03Cr19Ni10N | 00Cr18Ni10N | 0.030 | 1.00 | 2.00 | 0.045 | 0.030 | 8.00-12.00 | 18.00-20.00 | – | – | 0.10-0.16 | – |
25 | 12Cr18Ni12 | 1Cr18Ni12 | 0.120 | 1.00 | 2.00 | 0.045 | 0.030 | 10.50-13.00 | 17.00-19.00 | – | – | – | – |
26 | 08Cr18Ni12 | 0Cr18Ni12 | 0.080 | 1.00 | 2.00 | 0.045 | 0.030 | 11.00-13.50 | 16.50-19.00 | – | – | – | – |
27 | 08Cr16Ni18 | 0Cr16Ni18 | 0.080 | 1.00 | 2.00 | 0.045 | 0.030 | 17.00-19.00 | 15.00-17.00 | – | – | – | – |
28 | 08Cr20Ni11 | 0.080 | 1.00 | 2.00 | 0.045 | 0.030 | 10.00-12.00 | 19.00-21.00 | – | – | – | – | |
29 | 22Cr21Ni12N(a) | 2Cr21Ni12N(a) | 0.15-0.28 | 0.75-1.25 | 1.00-1.60 | 0.035 | 0.030 | 10.50-12.50 | 20.00-22.00 | – | – | 0.15-0.30 | – |
30 | 20Cr23Ni13(a) | 2Cr23Ni13(a) | 0.200 | 1.00 | 2.00 | 0.035 | 0.030 | 12.00-15.00 | 22.00-24.00 | – | – | – | – |
31 | 08Cr23Ni13(a) | 0Cr23Ni13(a) | 0.080 | 1.00 | 2.00 | 0.045 | 0.030 | 12.00-15.00 | 22.00-24.00 | – | – | – | – |
32 | 18Cr23Ni18 | 1Cr23Ni18 | 0.180 | 1.00 | 2.00 | 0.035 | 0.025 | 17.00-20.00 | 22.00-25.00 | – | – | – | |
33 | 25Cr25Ni20(a) | 2Cr25Ni20(a) | 0.250 | 1.50 | 2.00 | 0.045 | 0.030 | 19.00-22.00 | 24.00-26.00 | – | – | – | – |
34 | 08Cr25Ni20(a) | 0Cr25Ni20(a) | 0.080 | 1.50 | 2.00 | 0.045 | 0.030 | 19.00-22.00 | 24.00-26.00 | – | – | – | – |
35 | 03Cr25Ni22Mo3N | 0.030 | 0.40 | 2.00 | 0.030 | 0.015 | 21.00-23.00 | 24.00-26.00 | 2.00-3.00 | – | 0.10-0.16 | – | |
36 | 02Cr20Ni18Mo6CuN | 0.020 | 0.80 | 1.00 | 0.030 | 0.010 | 19.50-20.50 | 17.50-18.50 | 6.00-6.50 | 0.50-1.00 | 0.18-0.22 | – | |
37 | 15Cr16Ni35(a) | 1Cr16Ni35(a) | 0.150 | 1.50 | 2.00 | 0.040 | 0.030 | 33.00-37.00 | 14.00-17.00 | – | – | – | – |
38 | 08Cr17Ni12Mo2(a) | 0Cr17Ni12Mo2(a) | 0.080 | 1.00 | 2.00 | 0.045 | 0.030 | 10.00-14.00 | 16.00-18.00 | 2.00-3.00 | – | – | – |
39 | 03Cr17Ni12Mo2 | 00Cr17Ni14Mo2 | 0.030 | 1.00 | 2.00 | 0.045 | 0.030 | 10.00-14.00 | 16.00-18.00 | 2.00-3.00 | – | – | – |
40 | 07Cr17Ni12Mo2(a) | 1Cr17Ni12Mo2(a) | 0.04-0.10 | 1.00 | 2.00 | 0.045 | 0.030 | 10.00-14.00 | 16.00-18.00 | 2.00-3.00 | – | – | – |
41 | 08Cr17Ni12Mo2Ti(a) | 0Cr18Ni12Mo2Ti(a) | 0.080 | 1.00 | 2.00 | 0.045 | 0.030 | 10.00-14.00 | 16.00-18.00 | 2.00-3.00 | – | – | Ti≥5C |
42 | 08Cr17Ni12Mo2Nb | 0.080 | 1.00 | 2.00 | 0.045 | 0.030 | 10.00-14.00 | 16.00-18.00 | 2.00-3.00 | – | 0.10 | Nb 10C～1.10 | |
43 | 08Cr17Ni12Mo2N | 0Cr17Ni12Mo2N | 0.080 | 1.00 | 2.00 | 0.045 | 0.030 | 10.50-13.00 | 16.00-18.00 | 2.00-3.00 | – | 0.10-0.16 | – |
44 | 03Cr17Ni12Mo2N | 00Cr17Ni13Mo2N | 0.030 | 1.00 | 2.00 | 0.045 | 0.030 | 10.00-13.00 | 16.00-18.00 | 2.00-3.00 | – | 0.10-0.16 | – |
45 | 08Cr18Ni12Mo2Cu2 | 0Cr18Ni12Mo2Cu2 | 0.080 | 1.00 | 2.00 | 0.045 | 0.030 | 10.00-14.50 | 17.00-19.00 | 1.20-2.75 | 1.00-2.50 | – | – |
46 | 03Cr18Ni14Mo2Cu2 | 00Cr18Ni14Mo2Cu2 | 0.030 | 1.00 | 2.00 | 0.045 | 0.030 | 12.00-16.00 | 17.00-19.00 | 1.20-2.75 | 1.00-2.50 | – | – |
47 | 08Cr19Ni13Mo4 | 0Cr19Ni13Mo3 | 0.080 | 1.00 | 2.00 | 0.045 | 0.030 | 11.00-15.00 | 18.00-20.00 | 3.00-4.00 | – | – | – |
48 | 03Cr19Ni13Mo4(a) | 00Cr19Ni13Mo3(a) | 0.030 | 1.00 | 2.00 | 0.045 | 0.030 | 11.00-15.00 | 18.00-20.00 | 3.00-4.00 | – | – | – |
49 | 04Cr18Ni16Mo5 | 0Cr18Ni16Mo5 | 0.040 | 1.00 | 2.50 | 0.045 | 0.030 | 15.00-17.00 | 16.00-19.00 | 4.00-6.00 | – | – | – |
50 | 03Cr19Ni16Mo5N | 0.030 | 1.00 | 2.00 | 0.045 | 0.030 | 13.50-17.50 | 17.00-20.00 | 4.00-5.00 | – | 0.10-0.20 | – | |
51 | 03Cr19Ni13Mo4N | 0.030 | 1.00 | 2.00 | 0.045 | 0.030 | 11.00-15.00 | 18.00-20.00 | 3.00-4.00 | – | 0.10-0.22 | – | |
52 | 03Cr18Ni14Mo3 | 00Cr18Ni14Mo2 | 0.030 | 1.00 | 2.00 | 0.025 | 0.010 | 13.00-15.00 | 17.00-19.00 | 2.50-3.50 | 0.50 | 0.10 | – |
53 | 03Cr18Ni15Mo4N | 00Cr18Ni15Mo4N | 0.030 | 1.00 | 2.00 | 0.025 | 0.010 | 14.00-16.00 | 17.00-19.00 | 2.35-4.20 | 0.50 | 0.10-0.20 | – |
54 | 08Cr18Ni10Ti(a) | 0Cr18Ni10Ti(a) | 0.080 | 1.00 | 2.00 | 0.045 | 0.030 | 9.00-12.00 | 17.00-19.00 | – | – | – | Ti 5C～0.70 |
55 | 07Cr18Ni11Ti | 1Cr18Ni11Ti | 0.04-0.10 | 0.75 | 2.00 | 0.030 | 0.030 | 9.00-13.00 | 17.00-20.00 | – | – | – | Ti 4C～0.60 |
56 | 02Cr25Ni22Mo8Mn3CuN | 0.020 | 0.50 | 2.00-4.00 | 0.030 | 0.005 | 21.00-23.00 | 24.00-25.00 | 7.00-8.00 | 0.30-0.60 | 0.45-0.55 | – | |
57 | 03Cr24Ni17Mo5Mn6NbN | 0.030 | 1.00 | 5.00-7.00 | 0.030 | 0.010 | 16.00-18.00 | 23.00-25.00 | 4.00-5.00 | – | 0.40-0.60 | N≤0.10 | |
58 | 08Cr18Ni11Nb(a) | 0Cr18Ni11Nb(a) | 0.080 | 1.00 | 2.00 | 0.045 | 0.030 | 9.00-12.00 | 17.00-19.00 | – | – | – | Nb 10C～1.10 |
59 | 07Cr18Ni11Nb(a) | 1Cr19Ni11Nb(a) | 0.04-0.10 | 1.00 | 2.00 | 0.045 | 0.030 | 9.00-12.00 | 17.00-19.00 | – | – | – | Nb 8C～1.10 |
60 | 45Cr14Ni14W2Mo(a) | 4Cr14Ni14W2Mo(a) | 0.40-0.50 | 0.80 | 0.70 | 0.035 | 0.030 | 13.00-15.00 | 13.00-15.00 | 0.25-0.40 | – | – | W 2.00～2.75 |
61 | 25Cr18Ni8W2(a) | 2Cr18Ni8W2(a) | 0.21-0.28 | 0.30-0.80 | 0.70 | 0.030 | 0.025 | 7.50-8.50 | 17.00-19.00 | – | – | – | W 2.00～2.50 |
62 | 08Cr18Ni13Si4(a) | 0Cr18Ni13Si4(a) | 0.080 | 3.00-5.00 | 2.00 | 0.045 | 0.030 | 11.50-15.00 | 15.00-20.00 | – | – | – | (b) |
63 | 02Cr18Ni15Si4Nb | 0.020 | 3.70-4.50 | 2.00 | 0.020 | 0.020 | 14.00-15.50 | 17.00-18.50 | – | – | – | Nb(d)0.40～0.80 | |
64 | 02Cr21Ni26Mo5Cu2 | 0.020 | 1.00 | 2.00 | 0.045 | 0.030 | 23.00-28.00 | 19.00-23.00 | 4.00-5.00 | 1.00-2.00 | 0.10 | – | |
65 | 20Cr20Ni14Si2(a) | 1Cr20Ni14Si2(a) | 0.200 | 1.50-2.50 | 1.50 | 0.035 | 0.030 | 12.00-15.00 | 19.00-22.00 | – | – | – | – |
66 | 20Cr25Ni20Si2(a) | 1Cr25Ni20Si2(a) | 0.200 | 1.50-2.50 | 1.50 | 0.035 | 0.030 | 18.00-21.00 | 24.00-27.00 | – | – | – | – |
Note 1: All components listed in the table are maximum values except for those with ranges or minimum values.
Note 2: Titanium, niobium and zirconium can improve the stability of steel. According to the atomic number of these elements and the carbon content and nitrogen content, the following equivalence exists: Ti≌7/4Nb≌7/4Zr.
a Heat-resistant steel or can be used as heat-resistant steel.
b If necessary, alloy elements other than those in the table above can be added;
c Mo less than or equal to 0.60% can be added;
d When 0.40%-0.80% Nb is added to the steel, the carbon content is allowed to be relaxed to no more than 0.03%
Serial number | New grades | Old brand | Chemical composition (mass fraction), % | |||||||||||
C | Si | Mn | P | S | Ni | Cr | Mo | Cu | N | Other elements | ||||
67 | 14Cr18Ni11Si4AlTi | 1Cr18Ni11Si4AlTi | 0.10-0.18 | 3.40-4.00 | 0.80 | 0.035 | 0.030 | 10.00-12.00 | 17.50-19.50 | – | – | – | Ti 0.40～0.70 Al 0.10～0.30 | |
68 | 03Cr19Ni5Mo3Si2N | 00Cr18Ni5Mo3Si2 | 0.030 | 1.30-2.00 | 1.00-2.00 | 0.035 | 0.030 | 4.50-5.50 | 18.00-19.50 | 2.50-3.00 | – | 0.05-0.12 | – | |
69 | 12Cr21Ni5Ti | 1Cr21Ni5Ti | 0.09-0.14 | 0.08 | 0.80 | 0.035 | 0.030 | 4.80-5.80 | 20.00-22.00 | – | – | – | Ti 5(C—0.02)～0.80 | |
70 | 03Cr22Ni5Mo3N | 0.030 | 1.00 | 2.00 | 0.030 | 0.020 | 4.50-6.50 | 21.00-23.00 | 2.50-3.50 | – | 0.08-0.20 | – | ||
71 | 03Cr23Ni4N | 0.030 | 1.00 | 2.50 | 0.035 | 0.030 | 3.00-5.50 | 21.50-24.50 | 0.05-0.60 | 0.05-0.60 | 0.05-0.20 | – | ||
72 | 03Cr25Ni5Mo2N | 0.030 | 1.00 | 2.00 | 0.030 | 0.030 | 5.50-6.50 | 24.00-26.00 | 1.20-2.50 | – | 0.10-0.20 | – | ||
73 | 03Cr25Ni7Mo3WCuN | 0.030 | 1.00 | 0.75 | 0.030 | 0.030 | 5.50-7.50 | 24.00-26.00 | 2.50-3.50 | 0.20-0.80 | 0.20-0.30 | W 0.10～0.50 | ||
74 | 04Cr25Ni6Mo3Cu2N | 0.040 | 1.00 | 1.50 | 0.035 | 0.030 | 4.50-6.50 | 24.00-27.00 | 2.90-3.90 | 1.50-2.50 | 0.10-0.25 | – | ||
75 | 03Cr25Ni7Mo4N | 0.030 | 0.80 | 1.20 | 0.035 | 0.020 | 6.00-8.00 | 24.00-26.00 | 3.00-5.00 | 0.50 | 0.24-0.32 | – | ||
76 | 03Cr25Ni7Mo4WCuN | 0.030 | 1.00 | 1.00 | 0.030 | 0.010 | 6.00-8.00 | 24.00-26.00 | 3.00-4.00 | 0.50-1.00 | 0.20-0.30 | W 0.50～1.00 Cr+3.3Mo+16N≥40 | ||
Table 2 Standard grades and chemical compositions of austenitic-ferritic stainless steel
Note: Except for the range or minimum value, the rest of the components listed in the table are maximum values.
Serial number | New grades | Old brand | Chemical composition (mass fraction), % | |||||||||||
C | Si | Mn | P | S | Ni | Cr | Mo | Cu | N | Other elements | ||||
77 | 08Cr13Al(a) | 0Cr13Al(a) | 0.08 | 1.00 | 1.00 | 0.040 | 0.030 | (b) | 11.50-14.50 | – | – | – | Al 0.10 ～0.30 | |
78 | 08Cr13 | 0Cr13 | 0.08 | 1.00 | 1.00 | 0.040 | 0.030 | (b) | 11.50-13.50 | – | – | – | – | |
79 | 08Cr11Ti | 0Cr11Ti | 0.08 | 1.00 | 1.00 | 0.040 | 0.030 | (b) | 10.50-11.75 | – | – | – | Ti 6C ～0.75 | |
80 | 03Cr11Ti | 0.03 | 1.00 | 1.00 | 0.040 | 0.030 | (b) | 10.50-11.75 | – | – | – | Ti 6C ～0.75 | ||
81 | 03Cr11NbTi | 0.03 | 1.00 | 1.00 | 0.040 | 0.020 | (b) | 10.50-11.70 | – | – | 0.030 | Ti+Nb:8(C+N)+0.08～0.75 Ti ≥0.05 | ||
82 | 03Cr12(a) | 00Cr12(a) | 0.03 | 1.00 | 1.00 | 0.040 | 0.030 | (b) | 11.00-13.50 | – | – | – | – | |
83 | 03Cr12Ni | 0.03 | 1.00 | 1.50 | 0.040 | 0.015 | 0.30-1.00 | 10.50-12.50 | – | – | 0.030 | – | ||
84 | 12Cr15 | 1Cr15 | 0.12 | 1.00 | 1.00 | 0.040 | 0.030 | (b) | 14.00-16.00 | – | – | – | – | |
85 | 12Cr17(a) | 1Cr17(a) | 0.12 | 1.00 | 1.00 | 0.040 | 0.030 | (b) | 16.00-18.00 | – | – | – | – | |
86 | Y12Cr17 | Y1Cr17 | 0.12 | 1.00 | 1.25 | 0.040 | ≥0.15 | (b) | 16.00-18.00 | (c) | – | – | – | |
87 | 03Cr18Ti | 00Cr17 | 0.03 | 0.75 | 1.00 | 0.040 | 0.030 | (b) | 16.00-19.00 | – | – | – | Ti or Nb: 0.10～1.00 | |
88 | 12Cr17Mo | 1Cr17Mo | 0.12 | 1.00 | 1.00 | 0.040 | 0.030 | (b) | 16.00-18.00 | 0.75-1.25 | – | – | – | |
89 | 12Cr17MoNb | 0.12 | 1.00 | 1.00 | 0.040 | 0.030 | (b) | 16.00-18.00 | 0.75-1.25 | – | – | Nb 5C～0.80 | ||
90 | 03Cr18MoTi | 0.03 | 1.00 | 1.00 | 0.040 | 0.030 | (b) | 16.00-19.00 | 0.75-1.50 | – | 0.025 | Ti, Nb, Zr or their combination: 8×(C%+N%)～ 0.80 | ||
91 | 03Cr18NbTi | 0.03 | 1.00 | 1.00 | 0.040 | 0.015 | (b) | 17.50-18.50 | – | – | – | Ti 0.10～0.60 Nb≥0.30+3C | ||
92 | 03Cr18Mo2NbTi | 00Cr18Mo2 | 0.03 | 1.00 | 1.00 | 0.040 | 0.030 | 1.00 | 17.50-19.50 | 1.75-2.50 | – | 0.035 | (Ti+Nb):[0.20+4(C+N)] ～0.80 | |
93 | 01Cr27Mo | 00Cr27Mo | 0.01 | 0.40 | 0.40 | 0.030 | 0.020 | (d) | 25.00-27.50 | 0.75-1.50 | 0.20 | 0.015 | (d) | |
94 | 01Cr30Mo2 | 00Cr30Mo2 | 0.01 | 0.40 | 0.40 | 0.030 | 0.020 | (d) | 28.50-32.00 | 1.50-2.50 | 0.20 | 0.015 | (d) | |
Table 3 Standard grades and chemical compositions of ferritic stainless steel
Note 1: All components listed in the table are maximum values except for those with ranges or minimum values.
Note 2: Titanium, niobium and zirconium can improve the stability of steel. According to the atomic number of these elements and the carbon content and nitrogen content, the following equivalence exists: Ti≌7/4Nb≌7/4Zr.
a Heat-resistant steel or can be used as heat-resistant steel.
b Allowed to contain less than or equal to 0.60% Ni;
c Can add less than or equal to 0.60% Mo;
d Allowed to contain less than or equal to 0.50% Ni, less than or equal to 0.20% Cu, but the content of Ni+Cu should be less than or equal to 0.50%; alloy elements other than those in the above table can be added as needed.
Serial number | New grades | Old brand | Chemical composition (mass fraction), % | ||||||||||
C | Si | Mn | P | S | Ni | Cr | Mo | Cu | N | Other elements | |||
95 | 15Cr12 | 1Cr12 | 0.15 | 0.50 | 1.00 | 0.040 | 0.030 | (b) | 11.50-13.00 | – | – | – | – |
96 | 15Cr13 | 1Cr13 | 0.15 | 1.00 | 1.00 | 0.040 | 0.030 | (b) | 11.50-13.50 | – | – | – | – |
97 | 05Cr13Ni5Mo | 0.05 | 0.60 | 0.50-1.00 | 0.030 | 0.030 | 3.50-5.50 | 11.50-14.00 | 0.50-1.00 | – | – | – | |
98 | Y15Cr13 | Y1Cr13 | 0.15 | 1.00 | 1.25 | 0.045 | ≥0.15 | (b) | 12.00-14.00 | (c) | – | – | |
99 | 21Cr13(a) | 2Cr13(a) | 0.16-0.25 | 1.00 | 1.00 | 0.040 | 0.030 | (b) | 12.00-14.00 | – | – | – | – |
100 | Y25Cr13Ni2 | Y2Cr13Ni2 | 0.20-0.30 | 0.50 | 0.80-1.20 | 0.08-0.12 | 0.15-0.25 | 1. 50-2.00 | 12.00-14.00 | (c) | – | – | – |
101 | 31Cr13 | 3Cr13 | 0.26-0.35 | 1.00 | 1.00 | 0.040 | 0.030 | (b) | 12.00-14.00 | – | – | – | – |
102 | Y31Cr13 | Y3Cr13 | 0.26-0.35 | 1.00 | 1.25 | 0.045 | ≥0.15 | (b) | 12.00-14.00 | (c) | – | – | – |
103 | 41Cr13 | 4Cr13 | 0.36-0.45 | 0.60 | 0.80 | 0.040 | 0.030 | (b) | 12.00-14.00 | – | – | – | – |
104 | 14Cr17Ni2(a) | 1Cr17Ni2(a) | 0.11-0.17 | 0.80 | 0.80 | 0.040 | 0.030 | 1.50-2.50 | 16.00-18.00 | – | – | – | – |
105 | 16Cr17Ni3(a) | 0.12-0.20 | 0.80 | 1.00 | 0.040 | 0.030 | 2.00-3.00 | 15.00-18.00 | – | – | – | – | |
106 | 68Cr17 | 7Cr17 | 0.60-0.75 | 1.00 | 1.00 | 0.040 | 0.030 | (b) | 16.00-18.00 | (d) | – | – | – |
107 | 85Cr17 | 8Cr17 | 0.75-0.95 | 1.00 | 1.00 | 0.040 | 0.030 | (b) | 16.00-18.00 | (d) | – | – | – |
108 | 108Cr17 | 11Cr17 | 0.95-1.20 | 1.00 | 1.00 | 0.040 | 0.030 | (b) | 16.00-18.00 | (d) | – | – | – |
109 | Y108Cr17 | Y11Cr17 | 0.95-1.20 | 1.00 | 1.25 | 0.045 | ≥0.15 | (b) | 16.00-18.00 | (d) | – | – | – |
110 | 95Cr18 | 9Cr18 | 0.90-1.00 | 0.80 | 0.80 | 0.040 | 0.030 | (b) | 17.00-19.00 | (d) | – | – | – |
111 | 108Cr17Mo | 9Cr18Mo | 0.95-1.10 | 0.80 | 0.80 | 0.040 | 0.030 | (b) | 16.00-18.00 | 0.40-0.70 | – | – | – |
112 | 90Cr18MoV | 9Cr18MoV | 0.85-0.95 | 0.80 | 0.80 | 0.040 | 0.030 | (b) | 17.00-19.00 | 1.00-1.30 | – | – | V 0.07～0.12 |
113 | 10Cr5Mo(a) | 1Cr5Mo(a) | 0.10 | 1.00 | 1.00 | 0.040 | 0.030 | (b) | 4.00-6.00 | 0.45-0.65 | – | – | – |
114 | 12Cr12Mo(a) | 1Cr12Mo(a) | 0.10-0.15 | 0.50 | 0.30-0.50 | 0.040 | 0.030 | 0.30-0.60 | 11.50-13.00 | 0.30-0.60 | 0.30 | – | – |
115 | 13Cr13Mo(a) | 1Cr13Mo(a) | 0.08-0.18 | 0.60 | 1.00 | 0.040 | 0.030 | (b) | 11.50-14.00 | 0.30-0.60 | – | – | – |
116 | 32Cr13Mo | 3Cr13Mo | 0.28-0.35 | 0.80 | 1.00 | 0.040 | 0.030 | (b) | 12.00-14.00 | 0.50-1.00 | – | – | – |
117 | 15Cr11MoV(a) | 1Cr11MoV(a) | 0.11-0.18 | 0.50 | 0.60 | 0.040 | 0.030 | 0.60 | 10.00-11.50 | 0.50-0.70 | – | – | V 0.25～0.40 |
118 | 15Cr12WMoV(a) | 1Cr12WMoV(a) | 0.12-0.18 | 0.50 | 0.50-0.90 | 0.040 | 0.030 | 0.40-0.80 | 11.00-13.00 | 0.50-0.70 | 0.30 | – | W 0.70～1.10 V 0.15～0.30 |
119 | 158Cr12MoV(a) | 1Cr12MoV(a) | 1.45-1.70 | 0.40 | 0.35 | 0.030 | 0.025 | – | 11.00-12.50 | 0.40-0.60 | – | – | V 0.15～0.30 |
120 | 21Cr12MoV(a) | 2Cr12MoV(a) | 0.18-0.24 | 0.10- 0.50 | 0.30-0.80 | 0.030 | 0.025 | 0.30-0.60 | 11.00-12.50 | 0.80-1.20 | 0.30 | – | V 0.25～0.35 |
121 | 18Cr12MoVNbN(a) | 2Cr12MoVNbN(a) | 0.15-0.20 | 0.50 | 0.50-1.00 | 0.040 | 0.030 | (b) | 10.00-13.00 | 0.30-0.90 | – | 0.05- 0.10 | V 0.10～0.40 Nb 0.20～0.60 |
122 | 13Cr11Ni2W2MoV(a) | 1Cr11Ni2W2MoV(a) | 0.10-0.16 | 0.60 | 0.60 | 0.035 | 0.030 | 1.40-1.80 | 10.50-12.00 | 0.35-0.50 | – | – | W 1.50～2.00 V 0.18～0.30 |
123 | 23Cr12NiWMoV(a) | 2Cr12NiMoWV(a) | 0.20-0.25 | 0.50 | 0.50-1.00 | 0.030 | 0.025 | 0.50-1.00 | 11.00-12.50 | 0.90-1.25 | 0.30 | – | W 0.9～1.25, V 0.20～0.30 |
124 | 13Cr14Ni3W2VB(a) | 1Cr14Ni3W2VB(a) | 0.10-0.16 | 0.60 | 0.60 | 0.300 | 0.030 | 2.80-3.40 | 13.00-15.00 | – | – | – | W 1.60~2.20 Ti≤0.05, B≤0.004 V 0.18~0.28 |
125 | 14Cr12Ni2WMoVNb(a) | 1Cr12Ni2WMoVNb(a) | 0.11-0.17 | 0.60 | 0.60 | 0.030 | 0.025 | 1.80-2.20 | 11.00-12.00 | 0.80-1.20 | – | – | W 0.70~1.00, V 0.20~0.30 Nb 0.15~0.30 |
126 | 15Cr11NiMoNbVN(a) | 2Cr11NiMoNbVN(a) | 0.15-0.20 | 0.50 | 0.50-0.80 | 0.020 | 0.015 | 0.30-0.60 | 10.00-12.00 | 0.60-0.90 | V 0.20~0.30, N 0.04~0.09, Cu≤0.1, Al≤0.30, Nb 0.20~0.60 | ||
127 | 45Cr9Si3(a) | 4Cr9Si2(a) | 0.40-0.50 | 3.00- 3.50 | 0.60 | 0.030 | 0.030 | (b) | 7.50-9.50 | – | – | – | – |
128 | 40Cr10Si2Mo(a) | 4Cr10Si2Mo(a) | 0.35-0.45 | 1.90- 2.60 | 0.70 | 0.035 | 0.030 | (b) | 9.00-10.50 | 0.70-0.90 | – | – | – |
129 | 80Cr20Si2Ni1(a) | 8Cr20Si2Ni(a) | 0.75-0.85 | 1.75- 2.25 | 0.20-0.60 | 0.030 | 0.030 | 1.15-1.65 | 19.00-20.50 | – | – | – | – |
Table 4 Standard grades and chemical compositions of martensitic stainless steel
Table 5 Standard grades and chemical compositions of precipitation hardening stainless steel
Serial number | New grades | Old brand | Chemical composition (mass fraction), % | ||||||||||
C | Si | Mn | P | S | Ni | Cr | Mo | Cu | N | Other elements | |||
130 | 05Cr13Ni8Mo2Al | 0.05 | 0.10 | 0.20 | 0.010 | 0.008 | 7.50-8.50 | 12.25-13.25 | 2.00-2.50 | – | 0.01 | Al 0.90～1.35 | |
131 | 03Cr12Ni9Cu2NbTi | 0.03 | 0.50 | 0.50 | 0.040 | 0.030 | 7.50-9.50 | 11.00-12.50 | 0.50 | 1.50-2.50 | – | Ti 0.80～1.40 Nb 0.10～0.50 | |
132 | 07Cr15Ni5Cu4Nb | 0.07 | 1.00 | 1.00 | 0.040 | 0.030 | 3.50-5.50 | 14.00-15.50 | – | 2.50-4.50 | – | Nb 0.15～0.45 | |
133 | 07Cr17Ni4Cu4Nb(a) | 0Cr17Ni4Cu4Nb(a) | 0.07 | 1.00 | 1.00 | 0.040 | 0.030 | 3.00-5.00 | 15.00-17.50 | – | 3.00-5.00 | – | Nb 0.15～0.45 |
134 | 09Cr17Ni7Al(a) | 0Cr17Ni7Al(a) | 0.09 | 1.00 | 1.00 | 0.040 | 0.030 | 6.50-7.70 | 16.00-18.00 | – | – | – | Al 0.75～1.50 |
135 | 09Cr15Ni7Mo3Al | 0Cr15Ni7Mo2Al | 0.09 | 1.00 | 1.00 | 0.040 | 0.030 | 6.50-7.70 | 14.00-16.00 | 2.00-3.00 | – | – | Al 0.75～1.50 |
136 | 09Cr12Mn5Ni4Mo3Al | 0Cr12Mn5Ni4Mo3Al | 0.09 | 0.80 | 4.40-5.30 | 0.030 | 0.025 | 4.00-5.00 | 11.00-12.00 | 2.70-3.30 | – | – | Al 0.50～1.00 |
137 | 09Cr17Ni5Mo3N | 0.07-0.11 | 0.50 | 0.50-1.25 | 0.040 | 0.030 | 4.00-5.00 | 16.00-17.00 | 2.50-3.20 | – | 0.07- 0.13 | – | |
138 | 08Cr17Ni7AlTi | 0.08 | 1.00 | 1.00 | 0.040 | 0.030 | 6.00-7.50 | 16.00-17.50 | – | – | – | Al≤0.40 Ti 0.40～1.20 | |
139 | 08Cr15Ni25MoTi2AlVB | 0Cr15Ni25MoTi2AlVB | 0.08 | 1.00 | 2.00 | 0.045 | 0.030 | 24.00-27.00 | 13.50-16.00 | 1.00-1.50 | – | – | Al≤0.35 Ti 1.90～2.35 B 0.001～0.010 V 0.10～0.50 |
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