Overview

Each country has its own steel standards. Steels with the same purpose have different grades in different countries. This article sorts out the equivalent grade comparison table of carbon steel and alloy steel. When purchasing steel, you can refer to the table below to find the steel with the corresponding grade.

Comparison table of equivalent grades of carbon structural steel

Introduction to the grade representation method of carbon steel (GB/T700-88):

Take Q235Bb as an example, where Q represents the yield strength of steel, the first letter of the pinyin of the word “Qu”; 235 represents the yield point (strength), the value is (MPa); B represents the quality grade: A, B, C, D; b represents one of the deoxidation methods, there are four deoxidation methods, b represents semi-killed steel, F represents boiling steel, Z represents killed steel (can be omitted), and TZ represents special killed steel.

Grade examples: Q195F, Q215AF, Q255A, Q275

China GB 700Russia TOCT 380USA ASTMUK BS 4360France NF A 35-501Germany DIN 17100Japan JISInternational ISO 630 1052
Q195CrlcnA33St33 (St33-1)G3113-87 SAPH32Fe310-0
CTlKnA33St33 (St33-2)G3113-87 SAPH32Fe310-0
Q215CT2cnA 283GRBA34-2(RSt34-1)G3112-87 SPHT2
CT2KnA 113GRB A 283GRBA34-1(USt34-1)G3101-87 SS34
ECT2cnA 306GR50 A 283GRBA34-2(RSt34-2)G3112-87 SPHT2
ECT2knA 113GRB A 283GRBA34-2(USt34-2)G3101-87 SS34
Q235Cr3cnA 283GRC A 306GR55E24-2 (A37-2)RSt37-2 (RSt37-2)G3113-87 SAPH38Fe360B
CT3KnA 284GRBE24-1 (A37-1)USt37-2 (USt37-2)G3113-87 SAPH38Fe360B
ECr3cnA 283GRC A 306GR55E24-3 (A37-3)St37-3 (St37-3)G3113-87 SAPH38Fe360D
BCT3knA 284GRBE24-2 (A37-2)USt37-2 (USt37-2)G3113-87 SAPH38Fe360C
Q255Cr4cnA36GRB A131GBR A573GR58GR40C GR43CE26-2 (A42-2)St44-2 (RSt42-2)G3106-88 SM41BFe430B
Cr4 knA36GD A131GRD A283GRDGR40A GR43AE26-1 (A42-1)(USt-42-2)G3101-87 SS41Fe430C
BCr4cnA36GRB A131GBR A573GR58GR40C GR43CE26-3 (A42-3)St44-3 (St42-3)G3106-88 SM41BFe430D
ECr4knA36GD A131GRD A283GRDGR40A GR43AE26-3 (A42-3)(USt42-2)G3106-88 SM41AFe430A
Q275Cr5cnA573GR70GR50AA50-2St50-2 (St50-1)G3106-88 SM50A1052 Fe490
BCr5CnA573GR70GR50AA50-2St50-2 (St50-2)G3106-88 SM50A1052 Fe490

Comparison table of equivalent grades of high-quality carbon structural steel

Introduction to the grade representation method of high-quality carbon steel (GB/T699-1999):

Take 08F, 45, 50Mn, 20A as an example, where the number (such as 50) represents the carbon content [w(C)]: expressed in average parts per thousand; Mn represents the manganese element: it is marked when the content is high [w(Mn)0.70%~1.00%], F represents a deoxidation method; A represents a quality grade, representing high-quality, and no symbol represents high-quality.

China GB 699Russia TOCTUSA AISIUK BSFrance NFGermany DINJapan JISInternational ISO 683/1
08F08KnUSt14SPH1
10F10knUSt13SPH2
15F15knSPH3
881008040A04 050A04S9CK
10101010040A10 045A10 060A10C10 XC10C10 CK10S10C
15151015040A15 050A15 060A15C15 XC15C15 CK15S15C S15CK
20201020040A20 050A20 060A20C20 XC18C22 CK22S20C S20C
25251025060A25 070M26C25 XC25C25 CK25S25CC25 C25E4 C25M2
30301030060A30C30 XC32C30 CK30S30C(C30) (C30E4) (C30M2)
35351035060A35C35 XC35C35 CK35S35CC35 C35E4 C35M2
40401040060A40C42 XC42C40 CK40S40C(C40) (C40E4) (C40M2)
45451045060A42 060A47C45 XC45C45 CK45S45CC45 C45E4 C45M2
50501049 1050060A52C50 XC48C50 CK50S50C(C50) (C50E4) (C50M2)
55551055060A57 070M35C55 XC55C55 CK55S55CC55 C55E4 C55M2
60601060060A62C60 XC60C60 CK60S58CC60 C60E4 C60M2
65651064 1065060A67C65 XC65C67 CK67
70701069 1070060A72 070A72C70 XC70C70 CK70
75751074 1075060A78 070A78XC75C75 CK75
80801080060A83XC80CK80
85851084 1085050A86 060A86XC85CK85
15Mn15T1016080A15 080A17XC1214Mn4 15Mn3
20Mn20T1019 1022080A20 080A22XC1819Mn5 20Mn5 21Mn4
25Mn25T1025 1026080A25 080A2726Mn5
30Mn30T1033080A30 080M30XC3230Mn4 31Mn4 30Mn5
35Mn35T1037080A35 080M3635Mn4 35Mn5
40Mn40T1039080A40 080M4040M540Mn4
45Mn45T1046080A47 080M4646Mn5
50Mn5or1053 1051080A52 080M50XC4850Mn5 52Mn5
60Mn60r1062 1061080A57 080A62CK60
65Mn65T1566080A6765Mn4
70Mn70r1572080A72

Comparison table of equivalent grades of alloy structural steel

Introduction to the grade representation method of alloy structural steel (GB/T3077-1999):

Take 25Cr2MoVA as an example, 25 represents the sulfur content, expressed in parts per thousand; Cr2MoV represents the chemical element symbol and content, expressed in percentages; A represents the quality grade, and the A mark represents high-quality steel with low sulfur and phosphorus content.

China GB 1591Russia rOCTUSA ASTMUK BSFrance NFGermany DINJapan JISChina GB/T 1591
09MnVQ295
09MnNb
09Mn209T2
12Mn10r12MF413Mn6
18NbQ345
09MnCuPTi
10MnSiCu10r2C1Ⅱ
12MnVQ345
14MnNb
16Mn14T2SA299Gr.1,Cr.2A SA455Ty.1,Ty.2 SA414Gr.G1633Gr.LA52C1 A52C2 A52CR1 A52CR2~17Mn4 19Mn5 19Mn6SPV32
16MnRE
10MnPNbRE
15MnV15T@A255Gr.A A255Gr.B15MnV5Q390
15MnTi
16MnNb
14MnVTiREQ420
15MnVNQ420
China GB 3077Russia TOCTUSA AISIUK BSFrance NFGermany DINJapan JISInternational ISO
20Mn220r21320 1321150M1920M520Mn5SMn21
30Mn230T21330150M2832M530Mn5SMn24
35Mn235T21335150M3635M536Mn5SMn1
40Mn240r21340 134140M5SMn2
45Mn245T2134545M546Mn7SMn3
50Mn250T2105255M550Mn7
20MnV20MnV6
30Mn2MoW
27SiMn27Cr27MnSi5
35SiMn35Cr38MS537MnSi5
42SiMn43CT38MS538MnSi4 46MnSi4
20SiMn2MoV
25SiMn2MoV
37SiMn2MoV
40B14B3535B2
45B50B46H45B2
50B14B50
40MnB15B4138MB540MnB4
45MnB15B48 50B44
20Mn2B20MB5
20MnMoB80B20
15MnVB
20MnVB
40MnVB
20MnTiB
25MnTiBRE
20SiMnVB
15Cr15X5015 5115523A14 523M1512C315Cr3SCr21
15CrA15XA
20Cr20X5120527A19 527M2018C3 18C420Cr4SCr22683/11 20Cr4 20CrS4
30Cr30X5130530A30 530A3228C4 32C428Cr4SCr2
35Cr35X5135530A3638C434Cr4 37Cr4SCr3683/8 3,3a,3b
40Cr40X5140530A40 530M4042C438Cr4 41Cr4SCr4683/1 4.4a.4b
45Cr45X514545C442Cr4SCr5
50Cr50X5150 5152En4850C4
38CrSi37XC 38XC
12CrMo12XM411912CD413CrMo4.4
15CrMo15XMASTM A-387Gr.BBS165315CD4.0515CrMo5 16CrMo4.4SCM21
20CrMo20XM4118CDS12 CDS11018CD4 20CD420CrMo5 22CrMo4SCM22
30CrMo30XM4130CDS1330CD425CrMo4SCM2
30CrMoA32CrMo12 31CrMo12
35CrMo35XM4135 4137708A3735CD434CrMo4 35CrMo4SCM3683/1 C35ea C35eb
42CrMo38XM4140 4142708M40 708A42 709M4040CD4 42CD441CrMo4 42CrMo4SCM4683/1 3
12CrMoV12XMO
35CrMoV35XM@ 40XMOA35CrMoV5
12Cr1MoV12X1MO13CrMoV4.2
25Cr2MolVA25X2MOA24CrMoV5.5
25Cr2Mo1VA25X2M10
20Cr3MoWVA20X3MBO21CrVMbW12
38CrMoAl38XMHOA6370(AMS)905M3940CAD6.1234CrAlMo5 41CrAIMo7SACM645683/10 41CrAlMo74
20CrV20XO612022CrV422CrV4
40CrV40XOA614042CrV442CrV
50CrVA50XOA6150735A5050CV450CrV4SUP10
15CrMn15XT 18XT16MC516MnCr5
20CrMn20XT512020MC520MnCr5SMC21
40CrMn40XT5140SMC3
20CrMnSi20XTC
25CrMnSi25XTCSMK1
30CrMnSi30XTC
30CrMnSiA30XTCA
35CrMnSiA35XTCASMK2
20CrMnMo18XTM411920CrMo5SCM23
40CrMnMo40XTM4140
20CrMnTi18XITSMK22
30CrMnTi30XTT30MnCrTi4
20CrNi20XH3120637A16 637M1720NC620NiCr6
40CrNi40XH3140640A35 640M4035NC646NiCr6SNCI
45CrNi45XH314545NiCr6
50CrNi50XH3150
12CrNi212XH2311510NC11 14NC1114NiCr10SNC21
12CrNi312XH33310 9310655A12 655M1310NC12 14NC1213NiCr12SNC22
20CrNi320XH320NC1122NiCr14
30CrNi330XH3653M3130NC11 30NC1228NiCr10 31NiCr14SNC2
37CrNi337XH335NC1535NiCr18SNC3
12Cr2Ni412X2H4E331012NC1514NiCr18
20Cr2Ni420X2H4E3316659A15 659M1520NC1422NiCr14
20CrNiMo20XH2M8620 8720805A20 805M2020NCD220NiCrMo2 21NiCrMo2
40CrNiMoA40XHMA4340 9840817M40 816M4035NCD5 40NCD336NiCrMo4 40NiCrMo6SNCM8683/1 4.4a.4b
45CrNiMoVA45XHMOA4347SNCM9
18Cr2Ni4WA18X2H4MA
25Cr2Ni4WA25X2H4MA

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