Steel grades
Encyclopedia
Steel grades to classify various steel
s by their composition and physical properties have been developed by a number of standards organizations.
Steel
Steel is an alloy that consists mostly of iron and has a carbon content between 0.2% and 2.1% by weight, depending on the grade. Carbon is the most common alloying material for iron, but various other alloying elements are used, such as manganese, chromium, vanadium, and tungsten...
s by their composition and physical properties have been developed by a number of standards organizations.
- SAE steel grades
- British StandardsBritish StandardsBritish Standards are the standards produced by BSI Group which is incorporated under a Royal Charter...
- International Organization for StandardizationInternational Organization for StandardizationThe International Organization for Standardization , widely known as ISO, is an international standard-setting body composed of representatives from various national standards organizations. Founded on February 23, 1947, the organization promulgates worldwide proprietary, industrial and commercial...
ISO/TS 4949:2003 - For alloys in general (including steel), unified numbering systemUnified numbering systemThe unified numbering system is an alloy designation system widely accepted in North America. It consists of a prefix letter and five digits designating a material composition. A prefix of S indicates stainless steel alloys, C for copper, brass, or bronze alloys, T for tool steels, etc...
(UNS) of ASTM InternationalASTM InternationalASTM International, known until 2001 as the American Society for Testing and Materials , is an international standards organization that develops and publishes voluntary consensus technical standards for a wide range of materials, products, systems, and services...
and the Society of Automotive Engineers (SAE). - Japanese steel grades : JIS standard
- Germany steel grades : DIN standard
- China steel grades : GB standard
Comparison
Below is a table comparing steel grades from different grading systems.| EN steel number | EN steel name | SAE grade | UNS | DIN | BS 970 | UNI | JIS |
|---|---|---|---|---|---|---|---|
| Carbon steels | |||||||
| 1.1141 1.0401 1.0453 |
C15D C18D |
1018 | CK15 C15 C16.8 |
040A15 080M15 080A15 EN3B |
C15 C16 1C15 |
S15 S15CK S15C |
|
| 1.0503 1.1191 1.1193 1.1194 |
C45 | 1045 | C45 CK45 CF45 CQ45 |
060A47 080A46 080M46 |
C45 1C45 C46 C43 |
S45C S48C |
|
| 1.0726 1.0727 |
35S20 45S20 |
1140/1146 | 35S20 45S20 |
212M40 En8M |
|||
| 1.0715 1.0736 |
11SMn37 | 1215 | 9SMn28 9SMn36 |
230M07 En1A |
CF9SMn28 CF9SMn36 |
SUM 25 SUM 22 |
|
| 1.0718 1.0737 |
11SMnPb30 11SMnPb37 |
12L14 | 9SMnPb28 9SMnPb36 |
230M07 Leaded En1A Leaded |
CF9SMnPb29 CF9SMnPb36 |
SUM 22L SUM 23L SUM 24L |
|
| Alloy steels | |||||||
| 1.7218 | 4130 | 25CrMo4 GS-25CrMo4 |
708A30 CDS110 |
25CrMo4 (KB) 30CrMo4 |
SCM 420 SCM 430 SCCrM1 |
||
| 1.7223 1.7225 1.7227 1.3563 |
42CrMo4 | 4140/4142 | 41CrMo4 42CrMo4 42CrMoS4 43CrMo4 |
708M40 708A42 709M40 En19 En19C |
41CrMo4 38CrMo4 (KB) G40 CrMo4 42CrMo4 |
SCM 440 SCM 440H SNB 7 SCM 4M SCM 4 |
|
| 1.6582 1.6562 |
34CrNiMo6 | 4340 | 34CrNiMo6 40NiCrMo8-4 |
817M40 En24 |
35NiCrMo6 (KB) 40NiCrMo7 (KB) |
SNCM 447 SNB24-1-5 |
|
| 1.6543 1.6523 |
20NiCrMo2-2 | 8620 | 21NiCrMo22 21NiCrMo2 |
805A20 805M20 |
20NiCrMo2 | SNCM 200 (H) | |
| Stainless steels | |||||||
| 1.4310 | X10CrNi18-8 | 301 | S30100 | ||||
| 1.4318 | X2CrNiN18-7 | 301LN | |||||
| 1.4305 | X8CrNiS18-9 | 303 | S30300 | X10CrNiS18-9 | 303S 31 En58M |
X10CrNiS18-09 | SUS 303 |
| 1.4301 | X2CrNi19-11 X2CrNi18-10 |
304 | S30400 | X5CrNi18-9 X5CrNi18-10 XCrNi19-9 |
304S 15 304S 16 304S 18 304S 25 En58E |
X5CrNi18-10 | SUS 304 SUS 304-CSP |
| 1.4306 | X2CrNi19-11 | 304L | S30403 | 304S 11 | SUS304L | ||
| 1.4311 | X2CrNiN18-10 | 304LN | S30453 | ||||
| 1.4948 | X6CrNi18-11 | 304H | S30409 | ||||
| 1.4303 | X5CrNi18-12 | 305 | S30500 | ||||
| 1.4401 1.4436 |
X5CrNiMo17-12-2 X5CrNiMo18-14-3 |
316 | S31600 | X5CrNiMo17 12 2 X5CrNiMo17 13 3 X5CrNiMo 19 11 X5CrNiMo 18 11 |
316S 29 316S 31 316S 33 En58J |
X5CrNiMo17 12 X5CrNiMo17 13 X8CrNiMo17 13 |
SUS 316 SUS316TP |
| 1.4404 | X2CrNiMo17-12-2 | 316L | S31603 | 316S 11 | SUS316L | ||
| 1.4406 1.4429 |
X2CrNiMoN17-12-2 X2CrNiMoN17-13-3 |
316LN | S31653 | ||||
| 1.4571 | 316Ti | S31635 | X6CrNiMoTi17-12 | 320S 33 | |||
| 1.4438 | X2CrNiMo18-15-4 | 317L | S31703 | ||||
| 1.4541 | 321 | S32100 | X6CrNiTi18-10 | 321S 31 | SUS321 | ||
| 1.4878 | X12CrNiTi18-9 | 321H | S32109 | ||||
| 1.4512 | X6CrTi12 | 409 | S40900 | ||||
| 410 | S41000 | ||||||
| 1.4016 | 430 | S43000 | X6Cr17 | 430S 17 | SUS430 | ||
| 440A | S44002 | ||||||
| 1.4112 | 440B | S44003 | |||||
| 1.4125 | 440C | S44004 | X105CrMo17 | SUS440C | |||
| 1.4104 | 430F | S44020 | X14CrMoS17 | SUS430F | |||
| 1.4539 | X1NiCrMoCu25-20-5 | 904L | N08904 | ||||
| 1.4547 | X1CrNiMoCuN20-18-7 | S31254 | |||||
| Tool steels | |||||||
| 1.2363 | X100CrMoV5 | A-2 | T30102 | X100CrMoV51 | BA 2 | X100CrMoV5-1 KU | SKD 12 |
| A-3 | T30103 | ||||||
| A-4 | T30104 | ||||||
| A-6 | T30106 | ||||||
| A-7 | T30107 | ||||||
| A-8 | T30108 | ||||||
| A-9 | T30109 | ||||||
| 1.2379 | X153CrMoV12 | D-2 | X153CrMoV12-1 | BD 2 | X155CrVMo12-1 | SKD 11 | |
| 1.2510 | O-1 | 100MnCrW4 | Bo 1 | 95MnWCr-5 KU | |||