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GB/T20878-2007 Stainless steel grades and chemical composition standards

2024-06-29 14:39:02 wiremeshxr

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 shows the standard grades of austenitic stainless steel and their chemical compositions;

Table shows the standard grades and chemical compositions of austenitic ferritic stainless steel;

Table shows the standard grades of ferritic stainless steel and their chemical compositions;

Table shows the standard grades and chemical compositions of martensitic stainless steel;

Table 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 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