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Austria ONORM StL6 Steels for barrels of small arms; quality specifications and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: StL6 / StL 6
Category Grade Standard Region/Area Standard Content
Metals StL 6 ÖNORM M3170 Austria Steels for barrels of small arms; quality specifications

Chemical composition(mass fraction)(wt.%) of the StL 6

Element Min Max Similar
V 0.2500 0.3500 -
Si 0.1500 0.5000 -
S - 0.0250 -
P - 0.0250 -
Mo 0.8000 1.2000 -
Mn 0.4000 0.7000 -
Cr 2.8000 3.2000 -
C 0.3000 0.3500 -

Mechanical Properties of steel grade StL 6

Yield
Rp0.2 (MPa)
Tensile
Rm (MPa)
Impact
KV/Ku (J)
Elongation
A (%)
Reduction in cross section on fracture
Z (%)
As-Heat-Treated Condition Brinell hardness (HBW)
336 (≥) 814 (≥) 41 12 23 Solution and Aging, Annealing, Ausaging, Q+T,etc 431

Physical Properties of steel grade StL 6

Temperature
(°C)
Modulus of elasticity
(GPa)
Mean coefficient of thermal expansion 10-6/(°C) between 20(°C) and Thermal conductivity
(W/m·°C)
Specific thermal capacity
(J/kg·°C)
Specific electrical resistivity
(Ω mm²/m)
Density
(kg/dm³)
Poisson’s coefficient, ν
31 - -     0.41 -  
219 165 - 33.3 342   -  
781 - 11 22.2   144 211

Heat Treatment of steel grade StL 6

Heat treated : 1573°C - 1979°C

Technological Curves of steel grade StL 6

Cross Reference Table (Equivalent Grade) of StL 6

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