Nickel Chromium Molybdenum Steel Hardened and Tempered – Round
Grade: 817M40
Finish: Bright Drawn/Turned
USEN 24T/USALOY 24T –
Nickel Chromium Molybdenum Steel Hardened and Tempered –
Colour: White/Brown
Bright: BS 970: Part 3: 1991: 817M40, BS 970: 1955: EN24T
Nearest Equivalent to AISI SAE4340
Form of Supply:
Bright Bars: Hardened and Tempered to T condition.
Stocked sizes – Bright Drawn/Turned
Imperial Diameters (inches)
1/4, 5/16, 3/8, 1/2, 5/8, 3/4, 7/8, 1, 1.1/8, 1.1/4, 1.3/8, 1.1/2, 1.5/8, 1.3/4, 1.7/8, 2, 2.1/4, 2.1/2. 2.3/4, 3 & 3.1/2
Metric Diameters (mm)
10, 12, 16, 20, 22, 25, 28, 30, 32, 35, 38, 40, 42, 45, 50, 55 & 60
Lengths – Standard bar lengths are 3/3.5 metres

Nickel Chromium Molybdenum Steel
Bright Drawn/Turned
Round – 817M40
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