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America SAE J81 Thread rolling screws and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: J81 / J 81
Category Grade Standard Region/Area Standard Content
Metals J 81 SAE J 81 America Thread rolling screws

Chemical composition(mass fraction)(wt.%) of the J 81

Element Min Max Similar
Mn 0.7000 1.6500 -
C 0.1500 0.2500 -

Mechanical Properties of steel grade J 81

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)
773 (≥) 413 (≥) 33 21 13 Solution and Aging, Annealing, Ausaging, Q+T,etc 113

Physical Properties of steel grade J 81

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
13 - -     0.13 -  
657 132 - 22.3 131   -  
666 - 12 14.2   223 442

Heat Treatment of steel grade J 81

Heat treated : 1194°C - 1458°C

Technological Curves of steel grade J 81

Cross Reference Table (Equivalent Grade) of J 81

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