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IS 9321 Grade 8B

India IS IS9321Grade8B Material for alloy cast iron valve seat inserts and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: IS9321Grade8B / IS 9321 Grade 8B
Category Grade Standard Region/Area Standard Content
Metals IS 9321 Grade 8B IS 9321 India Material for alloy cast iron valve seat inserts

Chemical composition(mass fraction)(wt.%) of the IS 9321 Grade 8B

Element Min Max Similar

Mechanical Properties of steel grade IS 9321 Grade 8B

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)
994 (≥) 611 (≥) 33 31 31 Solution and Aging, Annealing, Ausaging, Q+T,etc 124

Physical Properties of steel grade IS 9321 Grade 8B

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
12 - -     0.24 -  
395 254 - 11.3 342   -  
349 - 34 34.2   311 222

Heat Treatment of steel grade IS 9321 Grade 8B

Heat treated : 1883°C - 1753°C

Technological Curves of steel grade IS 9321 Grade 8B

Cross Reference Table (Equivalent Grade) of IS 9321 Grade 8B

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