070M20, also known as EN3A or EN3B, is a mild steel for general engineering use with good machinability but poor hardenability.
It is suitable for the production of low stressed components such as shafts, gears and threaded bars. It also offers good characteristics for welding, and may be case-hardened to improve wear resistance.
Chemical Analysis
Carbon | 0.16 – 0.24 |
Silicon | 0.10 – 0.40 |
Manganese | 0.50 – 0.90 |
Phosphorous | 0.00 – 0.05 |
Sulphur | 0.00 – 0.05 |
Specification Comparison
BRITISH BS 970:1991 | 070M20 |
BRITISH BS 970:1955 | EN3B |
GERMAN DIN | CK20 |
FRENCH AFNOR | XC18 |
SWEDISH SS | 1370 |
AMERICAN SAE | 1021 |
WERKSTOFF NO. | 1.1151 |
EUROPEAN STEEL NAME | C22E |
EUROPEAN STANDARD | EN10083-1 |
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