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England B.S. 704A60 Specification for wrought steels for mechanical and allied engineering purposes. Requirements for steels for the manufacture of hot formed springs and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 704A60 / 704 A 60
Category Grade Standard Region/Area Standard Content
Metals 704 A 60 BS 970-2 England Specification for wrought steels for mechanical and allied engineering purposes. Requirements for steels for the manufacture of hot formed springs

Chemical composition(mass fraction)(wt.%) of the 704 A 60

Element Min Max Similar
Cu - 0.3500 -
Ni - 0.4000 -
Si 0.1500 0.4000 -
S - 0.0350 -
P - 0.0350 -
Mo 0.1500 0.2500 -
Mn 0.6500 1.1000 -
Cr 0.6000 1.0000 -
C 0.5500 0.6400 -

Mechanical Properties of steel grade 704 A 60

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)
922 (≥) 595 (≥) 24 34 12 Solution and Aging, Annealing, Ausaging, Q+T,etc 334

Physical Properties of steel grade 704 A 60

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 - -     0.12 -  
722 466 - 14.3 142   -  
139 - 13 21.2   143 412

Heat Treatment of steel grade 704 A 60

Heat treated : 1685°C - 1572°C

Technological Curves of steel grade 704 A 60

Cross Reference Table (Equivalent Grade) of 704 A 60

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