Nickel Chromium Molybdenum Steel Annealed – Round
Grade: 817M40
Finish: Bright Drawn/Turned
USEN 24/USALOY 24 –
Nickel Chromium Molybdenum Steel Annealed –
Colour: White/Blue
Bright: BS 970: Part 3: 1991: 817M40, BS 970: 1955: EN24 Ann
Nearest Equivalent to AISI SAE4340
Form of Supply:
Bright Bars: Softened to HB 277 max.
Stocked sizes – Drawn/Turned
Imperial Diameters (inches)
3/8, 1/2, 5/8, 3/4, 7/8, 1, 1.1/4, 1.1/2, 1.3/4, 2 & 2.1/2
Metric Diameters (mm)
10, 16, 20, 28, 42 & 50
Lengths – Standard bar lengths are 3/3.5 metres.

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