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Low-alloy steels

Osprey® 4340

G43400 · 4340

Osprey® 4340 is a medium-carbon, low-alloy steel alloyed with nickel, chromium and molybdenum, and is suitable for heat treatment by quench and tempering to achieve high hardness and toughness.

Chemical composition, %

C
0.38-0.43
Si
0.15-0.35
Mn
0.6-0.8
P
<0.035
S
<0.040
Cr
0.7-0.9
Ni
1.65-2.00
Mo
0.2-0.3
Fe
Bal.

Designations

UNSG43400
ASTM, AISI4340

Suitable processes

  • Additive manufacturing
  • Metal injection moulding

Other low-alloy steels

Osprey® 4140 G41400 · 4140 Osprey® 4365 Osprey® 4605 4605 Osprey® 8620 G86200 · 8620 Osprey® SAE 52100 52100 · 1.3505 · 100Cr6 · G4805 · UNS G52986 Osprey® SCM415 G41180 · 15CrMo · 4118 · SCM415