B 30 70C Stainless Steels to B 30 (2012)

B 30 70C - Specification & Application

  • B 30 (2012) - Standard Specification for Copper Alloys in Ingot Form

Standard Specification for Copper Alloys in Ingot Form

Chemical composition(wt.%) of B 30 70C grade: to B 30 (2012)

Elements Min.(≥) Max.(≤) Similar Remarks
C - 0.15
Si - 1.00
Mn 3.75 4.75
P - 0.045
S - 0.03
Ni 9.00 10.50
Cr 19.00 22.00
Al - -
Cu - -
Ti - -
Fe - -
N - -
Mo - -
V - -

B 30 70C - Detail

Standard Specification for Copper Alloys in Ingot Form

Mechanical properties of grade B 30 70C B 30 (2012)

Proof strength
Rp0.2 (MPa)
Tensile strength
Rm (MPa)
Impact energy
KV (J)
Elongation at fracture
A (%)
Reduction in cross section on fracture
Z (%)
As-Heat-Treated Condition Brinell hardness (HBW)
248 (≥) 955 (≥) 12 22 24 Solution and Aging, Annealing, Ausaging, Q+T,etc 331

Physical properties of grade B 30 70C B 30 (2012)

Property Density
kg/dm3
Temperature T
°C/F
Specific heat
J / kgK
Thermal conductivity
W/mK
Electric resistance
µΩ·cm
Modulus of elasticity
kN/mm2
Expansion rate
116 (≥) 497 (≥) 22 24 33 Solution and Aging, Annealing, Ausaging, Q+T,etc 222
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
457 421 393
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