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America SAE 4820H Hardenability bands for carbon and alloy H steels and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 4820H / 4820 H
Category Grade Standard Region/Area Standard Content
Metals 4820 H SAE J 1268 America Hardenability bands for carbon and alloy H steels

Chemical composition(mass fraction)(wt.%) of the 4820 H

Element Min Max Similar
Si 0.1500 0.3500 -
S - 0.0400 -
P - 0.0300 -
Ni 3.2000 3.8000 -
Mo 0.2000 0.3000 -
Mn 0.4000 0.8000 -
Cu - 0.3500 -
Cr - 0.2000 -
C 0.1700 0.2300 -

Mechanical Properties of steel grade 4820 H

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)
197 (≥) 414 (≥) 23 13 42 Solution and Aging, Annealing, Ausaging, Q+T,etc 124

Physical Properties of steel grade 4820 H

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
41 - -     0.41 -  
447 973 - 41.3 422   -  
797 - 13 42.2   244 132

Heat Treatment of steel grade 4820 H

Heat treated : 1179°C - 1164°C

Technological Curves of steel grade 4820 H

Cross Reference Table (Equivalent Grade) of 4820 H

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