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BS 970 1991 | BS 970 1955 EN | AISI/SAE | Werkstoff |
817M40 | EN24 | 4340 | 1.6582 |
Thickness | from 3mm up to as thick as 150mm |
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Size | from 2000 x 1000mm up to 4000 x 2000mm |
Length | 3000mm-18000mm |
Supply Condition | As Rolled, Normalized Rolling, Furnace Normalizing, Vacuum Degassing, Simulated Post-Weld Heat Treatment or as per customer requirement. |
Impact tested | -52° C |
Process of Manufacturing | Hot-Rolled (HR) |
C | P | Mo | Mn | S | Cr | Si | Ni | |
EN - 24 | .35 - .45 | .040 | .20 - .40 | .45 - .70 | .040 | .90 - 1.40 | .10 - .35 | 1.30 - 1.80 |
Max Stress | 850-1000 n/mm2 | |
Yield Stress | 680 n/mm2 Min | Up to 150mm LRS |
654 n/mm2 Min | 150 to 250mm LRS | |
0.2% Proof Stress | 665 n/mm2 Min | Up to 150mm LRS |
635 n/mm2 Min | 150 to 250mm LRS | |
Elongation | 13% Min | (9% if cold drawn) |
Impact KCV | 50 Joules Min | Up to 150mm LRS |
35 Joules Min | 150 to 250mm LRS | |
Hardness | 248-302 HB |