What makes one steel grade superior to another? In the world of construction and manufacturing, choosing the right carbon structural steel is crucial. This guide provides a comprehensive comparison of carbon steel grades from various international standards, helping you understand their specific applications and properties. By the end of this article, you’ll have a clear understanding of how to select the optimal steel grade for your projects, ensuring both safety and efficiency. Dive into the detailed chart to make informed decisions for your next venture.
| China | United States | Germany | Japan | France | United Kingdom | International |
| GB700 | ASTM | DIN 17100 | JIS | NF A35-501 | BS 4360 | ISO 630/1052 |
| Q195 | St33 （St33-1） | G3113-87 SAPH32 | A33 | Fe310-0 | ||
| St33 (St33-2) | G3113-87 SAPH32 | A33 | Fe310-0 | |||
| Q215 | A283GRB | (RSt34-1） | G3112-87 SPHT2 | A34-2 | ||
| A113GRB A283GRB | (USt34-1) | G3101-87 SS34 | A342-1 | |||
| AA306GR50 A283GRB | (RSt34-2) | G3112-87 SPHT2 | A34-2 | |||
| A113GRB A283GRB | (USt3-2) | G3101-87 SS34 | A34-2 | |||
| Q235 | A283GRC A306GR55 | RSt37-2 (RSt37-2) | G3113-87 SAPH38 | E24-2 (A37-2) | Fe360B | |
| A284GRB | USt37-2 (USt37-2) | G3113-87 SAPH38 | E24-1 (A37-1) | Fe360B | ||
| A283GRC A306GR55 | St37-3 (St37-3) | G3113-87 SAPH38 | E24-3 (A37-3) | Fe360D | ||
| A284GRB | USt37-2 (USt37-2) | G3113-87 SAPH38 | E24-2 (A37-2) | Fe360C | ||
| Q255 | A36GRB A131GBR A573GRB | (RSt42-2) | G3106-88 SM41B | E26-2 (A42-2) | GR40C GR43C | Fe430B |
| A36GRD A131GRD A283GRD | (USt42-2) | G3101-87 SS41 | E26-1 (A42-1) | GR40A GR43A | Fe430C | |
| A36GRB A131GBR A573GRB | St44-3 (St42-3) | G3106-88 SM41B | E26-3 (A42-3) | GR40C GR43C | Fe430D | |
| A36GD A131GRD A283GRD | (USt42-2) | G3106-88 SM41A | E26-3 (A42-3) | GR40A GR43A | Fe430A | |
| Q275 | A573GR70 | St50-2 (St50-1) | G3106-88 SM50A | A50-2 | GR50A | 1052 Fe490 |
| A573GR70 | St50-2 (St50-2) | G3106-88 SM50A | A50-2 | GR50A | 1052 Fe490 |
| China | United States | Germany | Japan | France | United Kingdom | International |
| GB699 | AISI | DIN | JIS | NF A35-501 | BS 4360 | ISO630/1052 |
| 08F | USt14 | SPH1 | ||||
| 10F | USt13 | SPH2 | ||||
| 15F | SPH3 | |||||
| 08 | 1008 | S9CK | 140A04 050A04 | |||
| 10 | 1010 | C10 CK10 | S10C | C10 XC10 | 040A10 045A10 060A10 | |
| 15 | 1015 | C15 CK15 | S15CS15CK | C15 XC15 | 040A15 050A15 060A15 | |
| 20 | 1020 | C22 CK22 | S20CS20C | C20 XC18 | 040A20 050A20 060A20 | |
| 25 | 1025 | C25 CK25 | S25C | C25 XC25 | 060A25 070M26 | C25 C25E4 C25M2 |
| 30 | 1030 | C30 CK30 | S30C | C30 XC32 | 060A30 | (C30) (C30E4) (C30M2) |
| 35 | 1035 | C35 CK35 | S35C | C35 XC35 | 060A35 | C35 C35E4 C35M2 |
| 40 | 1040 | C40 CK40 | S40C | C42 XC42 | 060A40 | (C40) (C40E4) (C40M2) |
| 45 | 1045 | C45 CK45 | S45C | C45 XC45 | 060A42 060A47 | C45 C45E4 C45M2 |
| 50 | 1049 1050 | C50 CK50 | S50C | C50 XC48 | 060A52 | (C50) (C50E4) (C50M2) |
| 55 | 1055 | C55 CK55 | S55C | C55 XC55 | 060A57 070M35 | C55 C55E4 C55M2 |
| 60 | 1060 | C60 CK60 | S58C | C60 XC60 | 060A62 | C60 C60E4 C60M2 |
| 65 | 1064 1065 | C67 CK67 | C65 XC65 | 060A67 | ||
| 70 | 1069 1070 | C70 CK70 | C70 XC70 | 060A72 070A72 | ||
| 75 | 1074 1075 | C75 CK75 | XC75 | 060A78 070A78 | ||
| 80 | 1080 | CK80 | XC80 | 060A83 | ||
| 85 | 1084 1085 | CK85 | XC85 | 050A86 060A86 | ||
| 15Mn | 1016 | 14Mn4 15Mn3 | XC12 | 080A15 080A17 | ||
| 20Mn | 1019 1022 | 19Mn5 20Mn5 21Mn4 | XC18 | 080A20 080A22 | ||
| 25Mn | 1025 1026 | 26Mn5 | 080A25 080A27 | |||
| 30Mn | 1033 | 30Mn4 31Mn4 30Mn5 | XC32 | 080A30 080M30 | ||
| 35Mn | 1037 | 35Mn4 35Mn5 | 080A35 080M36 | |||
| 40Mn | 1039 | 40Mn4 | 40M5 | 080A40 080M40 | ||
| 45Mn | 1046 | 46Mn5 | 080A47 080M46 | |||
| 50Mn | 1051 1053 | 50Mn5 52Mn5 | XC48 | 080M50 080A52 | ||
| 60Mn | 1061 1062 | CK60 | 080A62 080A57 | |||
| 65Mn | 1066 | 65Mn4 | 080A67 | |||
| 70Mn | 1572 | 080A72 |
As the founder of MachineMFG, I have dedicated over a decade of my career to the metalworking industry. My extensive experience has allowed me to become an expert in the fields of sheet metal fabrication, machining, mechanical engineering, and machine tools for metals. I am constantly thinking, reading, and writing about these subjects, constantly striving to stay at the forefront of my field. Let my knowledge and expertise be an asset to your business.
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