4140 Steel

4140 Steel

Steel name: 4140
Diagram No.: 217
DIN designation: 41CrMo4
Mat.No. (Wr.Nr.) designation: 1.7225
AISI/SAE designation: 4140
Chemical composition in weight %: 0.40% C, 0.20% Si, 0.80% Mn, 0.025% P, 0.025% S, 1.00% Cr, 0.25% Mo
Steel group: Structural steels
Properties: No data
Applications: 4140 is the most commonly used of the high tensile steels with a wide range of applications in automotive, gear and engine construction, crankshafts, steering knuckles, connecting rods, spindles, intermediate gears, pump and gear shafts. Axles, nuts and bolts.
Reference: Not shown in this demo version.

Heat Treatment
Hardening: 830-860^oC/oil
Tempering: See the diagram

Diagram Tempering Temperature - Mechanical Properties

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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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