AISI 4140 (0.40% C)

Low alloy steel, AISI 4140, annealed

Identification Designation  AISI  AISI 4140 Condition  Anneal  Annealed ed UNS number  G41400 US name SAE H41400, SAE 4140, SAE 4142, SAE 4140, ASTM ASTM J 70, ASTM J 65, ASTM J 55, ASTM 4140, ASTM G41420, G414 20,  ASTM  ASTM E7140, E7140, ASTM ASTM B7M, B7M, ASTM ASTM B16, B16, ASTM ASTM 4142H, 4142H, ASTM ASTM 4142, 4142, ASTM ASTM 4140H, 4140H, ASTM ASTM 4140, 4140, ASTM ASTM 4137H, 4137H, ASTM ASTM 41, ~SAE 4137H, ~ASTM B4D, ~ASTM 6 EN name ~42CrMoS4, ~42CrMo4 EN number  ~1.7227, ~1.7223 ISO name ~ 42 CrMoS 4, ~ 42 CrMo 4, ~42CrMo4 GB (Chinese) name ~42CrMo JIS (Japanese) name SNB22-5, SNB22-4, SNB22-3, SNB22-2 Tradenames TKS 42CRMO4, ThyssenKrupp Stahl AG (GERMANY); LASALLE 4140, LaSalle Steel Co. (USA); A-1252, AFORA (Aceros Afora S.A.) (SPAIN); A-1250, AFORA (Aceros Afora S.A.) (SPAIN);

General Properties Density Price

7.8e3 * 1. 1.23

-

7.9e3 1.35

kg/m^3 BRL/kg

0.38 0.8 96.8 0.75 0.15 0 0 0.15

-

0.43 1.1 97.8 1 0.25 0.035 0.04 0.35

% % % % % % % %

208 * 208 80 161 0.285

-

216 216 85 85 176 0.295

GPa GPa GPa GPa

Composition overview Composition (summary) Fe/0.8-1.1Cr/0.75-1Mn/0.38-0.43C/0.15-0.35Si Fe/0.8-1.1Cr/0.75-1Mn/0. 38-0.43C/0.15-0.35Si/0.15-0.25Mo/ /0.15-0.25Mo/