Martensitic stainless steel metal powder

The standard range of Osprey® metal powder includes martensitic stainless steel metal powder in grades of ASTM 410 to 440 types. The martensitic stainless steel metal powder is used in, for example, additive manufacturing and metal injection moulding (MIM).

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Selected martensitic stainless steels incl. chemical composition (nominal), %
Alloy (UNS) Description Fe C Cr Mo Si Mn S P
410
(S41000)		 See below1) Bal. 0.15 11.5-13.5 – 1.0 1.0 0.03 0.04
420
(S42000)		 See below2) Bal. Min.
0.15		 12-14 – 1.0 1.0 0.03 0.04
440C
(S44004)		 See below3) Bal. 0.95-1.20 16.0-18.0 0.75 1.0 1.0 0.03 0.04
440B
(S44003)		 See below4) Bal. 0.75-0.95 16.0-18.0 0.75 1.0 1.0 0.03 0.04

1) General purpose martensitic stainless steel.
2) Carbon increased to improved mechanical properties.
3) Carbon increase for highest hardness and chromium increased for corrosion resistance.
4) Carbon decreased slightly to improve toughness.

Datasheet

Osprey® 420 martensitic stainless steel metal powder(PDF document, 720 kB)