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Description

UK B.S. 9/0a Steel for cold forged fasteners and similar components and 9/0a Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Special Alloy: 9/0a
Category Type Steel Grade Standard Country Application
Steel GradesSpecial Alloy 9/0a B.S. UK Steel for cold forged fasteners and similar components
1/1
1/2
1/3
2/1
2/2
3/1
3/2
5/1
5/2
Grade 7

Chemical composition(mass fraction)(wt.%) of the 9/0a

C(%) Si(%) Mn(%) P(%) S(%) B(%)
0.15-0.20 0.40 0.60-0.90 0.035 0.035 0.0008-0.005

Mechanical Properties of steel grade 9/0a

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)
158 (≥) 897 (≥) 24 13 34 Solution and Aging, Annealing, Ausaging, Q+T,etc 433

Physical Properties of steel grade 9/0a

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 -  
227 113 - 12.3 312   -  
313 - 14 31.2   211 343

Heat Treatment of steel grade 9/0a

Heat treated : 1298°C - 1389°C

Technological Curves of steel grade 9/0a

Cross Reference Table (Equivalent Grade) of 9/0a

Grade Standard Country Application
9/0a B.S. UK Steel for cold forged fasteners and similar components

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