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Description

UK B.S. BS 3072, BS 3074, BS 3076, NA21 Specialsteel Specification for nickel and nickel alloys: bar and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Specialsteel: NA21
Category Class Grade Standard Country Application
Steel GradesSpecialsteel NA21 B.S. UK Specification for nickel and nickel alloys: bar

Chemical composition(mass fraction)(wt.%) of the NA21

C Si Mn P S Cr Ni Mo Al Cu Ti Fe Co Nb+Ta
≤0.10 ≤0.50 ≤0.50 ≤0.015 ≤0.015 20.00 -23.00 58.00 - ≥ 8.00 -10.00 ≤0.40 ≤ ≥ ≤0.40 ≤5.00 ≤1.00 3.15 -4.15

Mechanical Properties of steel grade NA21

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)
232 (≥) 185 (≥) 41 44 21 Solution and Aging, Annealing, Ausaging, Q+T,etc 334

Physical Properties of steel grade NA21

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 - -     0.13 -  
677 588 - 24.3 131   -  
959 - 32 13.2   114 211

Heat Treatment of steel grade NA21

Heat treated : 1664°C - 1816°C

Technological Curves of steel grade NA21

Relevant standard of NA21

BS 3072 Specification for nickel and nickel alloys: sheet and plate BS-3072.pdf
BS 3074 Specification for nickel and nickel alloys: seamless tube BS-3074.pdf
BS 3076 Specification for nickel and nickel alloys: bar BS-3076.pdf

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