4140 Steel

4140 Steel

Steel name: 4140
Diagram No.: 1622
Mat.No. (Wr.Nr.) designation: 1.7225
DIN designation: 42CrMo4
EN designation: 42CrMo4
AISI/SAE designation: 4140
JIS designation: SCM 4 H
Chemical composition in weight %: 0.38-0.43% C, 0.14-0.35% Si, 0.75-1.00% Mn, max. 0.040% P, max. 0.040% S, 0.80-1.10% Cr, 0.15-0.25% Mo
Steel group: Structural steels
Applications: 4140 Annealed is fine quality alloy steel used for brake die tooling, support tooling, die holders, short run stamping and bending dies.
Reference: Not shown in this demo version.

Heat Treatment
Hardening: 1250-1300 F/atmosphere or vacuum furnace
Tempering: See the diagram
Diagram note: Tempering at 400-1200F (205-650 C) for 1 hour per inch (25 mm) of thickness at temperature is recommended (2 hrs min). Air cool to room temperature.

Tempering Diagram

Price: 20.00 US $
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Other Steel Data links
Carbides in Steel
CCT and TTT Diagrams of Steels
CCT and TTT Diagram Calculating Service
Hardenability Diagrams of Steels
Hardenability Calculating Service
Macro Defects in Steel
Metal Etchants
Non-Metallic Inclusions in Steel
Semiconductor Etchants

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