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England B.S. S98 Specifition for aircraft material.2.5 Per cent nickel-chromium-molybdenum steel(high carbon) (75/85 tonf/sq in:limited ruling section 6 in) ) and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: S98 / S 98
Category Grade Standard Region/Area Standard Content
Metals S 98 BS 2S 98 England Specifition for aircraft material.2.5 Per cent nickel-chromium-molybdenum steel(high carbon) (75/85 tonf/sq in:limited ruling section 6 in) )

Chemical composition(mass fraction)(wt.%) of the S 98

Element Min Max Similar
C 0.3600 0.4400 -
Mn 0.4500 0.7000 -
P - 0.0250 -
S - 0.0150 -
Si 0.1000 0.3500 -
Ni 2.3000 2.8000 -
Cr 0.5000 0.8000 -
Mo 0.4500 0.6500 -
Al 0.0150 0.0500 -

Mechanical Properties of steel grade S 98

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)
937 (≥) 988 (≥) 22 14 41 Solution and Aging, Annealing, Ausaging, Q+T,etc 423

Physical Properties of steel grade S 98

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
34 - -     0.13 -  
785 668 - 22.3 344   -  
832 - 23 13.2   314 124

Heat Treatment of steel grade S 98

Heat treated : 1837°C - 1477°C

Technological Curves of steel grade S 98

Cross Reference Table (Equivalent Grade) of S 98

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