Call us on +44 (0) 1709 570212
  • Language

ASTM A193 B7

Alias

ASTM A193 B7
42CrMo4, 1.7225
42 CD4
708M40T
709M40

Chemistry

Alloy Steel/ Stainless Steel
Base Element Fe(Iron)

Element Amount (Max/Min)
C(Carbon) 0.37 to 0.49%
Cr(Chromium) 0.75 to 1.2%
Mn(Manganese) 0.65 to 1.1%
P(phosphorus) 0.035% (maximum)
S(Sulphur) 0.04% (maximum)
Si(Silicon) 0.15 to 0.35% (maximum)
Mechanical Property Statistic (Max/Min)
Ultimate Tensile Strength (UTS) 860 MPa (minimum)
0.2% Proof Stress 720 MPa (minimum)
Elongtion 16% (minimum)
Hardness (Brinell) A4D 321 HB (maximum)
Hardness (Rockwell C) 35 HRC (maximum)

Heat Treatment; Minimum tempering temperature: 593 degs C.

Uses

Bolting for pressure vessels, valves, flanges and fittings for high temperature or high pressure services, or other special purpose applications.

error: Content is Copyright Tachart Bolt & Nut Manufacturing !!