Carbon & Alloy Steel


Comparison of foreign standards – carbon and alloy steel specifications.

Great
Britain BS970
U.S.A
AISI/SAE
Germany
W-Nr Din
Italy
UNI
Japan
JIS
France
AFNOR
Spain
UNE
230M0712131.07159
SMn28
CF9SMn28SUM22S250F.2111
11SMn28
070M20M1020
M1023
1.0402
C22
C20
C21 C23
S20C
S22C
AF42C20
XC25 1C22
F.112
1C22
080M4010401.0511
C40
C40
1C40
1C55
AF60C40
F.114A
070M5510551.0535
C55
C55
1C55
S55C1C55
AF70C55
080A15
080M13
M1015
M1016
1.0401
C15
C15
C16 1C15
S15CXC18
AF37C12
F.111
709M40
708M40
4140
4142
1.7225
42CrMo4
38CrMo4KB
42CrMo4
SCN440
SNB7
42CD4
42CrMo4
F.8332
F.8232
817M40
816M40
4340
4337
1.6582
34CrNiMo6
35NiCrMo6KBSNcM44734CrNiMo8
35NCD6
F.1272
835M301.6747
30NiCrMo16-6
35NCD16F.1260
655M13
655H13
3310
9314
1.5752
14NiCr14
SNC81512NC15
14NC12
722M241.7361
32CrMo12
32CrMo1230CD12F.124.A
905M31
905M39
E71400
G71406
1.8509
41CrAlMo7
41CrAlMo7SACM645

If the specification you require is not listed, please e-mail us with the full specification and details of your required sizes and quantities.

We’re here to help with those ‘hard to find’ steel grades.


All our carbon and alloy steel specifications are available with a cast and analysis certificate, 3.1 mill certificate or a certificate of conformity. Please request with our sales team when placing any orders.


Our steel is supplied in accordance with our ISO 9001:2008 registration.  West Yorkshire Steel aim to satisfy the quality and delivery needs of our customers and we measure our performance by meeting customers’ requirements and work to continually improve the service that we provide. In order to achieve this, it is the our policy to maintain an efficient and effective Quality Management System based upon the requirements of BS EN ISO 9001:2008. Our staff are appropriately trained in order to effectively implement our Quality Management System. The achievement of quality and continuous improvement is fundamental to all the steel products and services provided by us and are practiced by all employees as an integral part of their work.