Through hardening steels

CLARMHB7

Spécifications

EU
40NiCrMoV15

Composition

C
0.4
Ni
3.7
Cr
1.6
Mo
0.9
V
0.3
Mn
0.1

Applications

• Large caliber gun barrels and accessories (breech rings, breech blocks, muzzle brakes, etc…).
• Pressure vessels.
• Mechanical parts in the range of YS 1250 to 1400 N/mm2.

Characteristics

• High mechanical characteristics.
• Good impact strength at low temperature.
• High level of hardenability.
• Good characteristics at high temperatures.
• Good temper resistance.

Mechanical properties

Heat
treatment
UTS
(N/mm²)
0,2%
YS
(N/mm²)
A
(%)
KV
-40°C
(J)
T + Rv 560°C 1480 1350 13 32
T + Rv 585°C135012601440

Key to heat treatment symbols

Solution treated H Annealed R
Thermo-mechanical treatment TM Quenched and tempered T+RV
Sub-zero treatment F Solution treated and aged H+V

See also

CLARMHB3

Through hardening steels