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B 30 70C

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A 958 Grade SC 8630 Class 70/36 B 30 72C
#307

Description

USA SAE B 30 (2012), B 30 70C Specialsteel Standard Specification for Copper Alloys in Ingot Form and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Specialsteel: B 30 70C
Category Class Grade Type Standard Country Application
Steel GradesSpecialsteel B 30 70C Precipitation-Hardening SAE USA Standard Specification for Copper Alloys in Ingot Form

Chemical composition(mass fraction)(wt.%) of the B 30 70C

C Si Mn P S Ni Cr Al Cu Ti Fe N Mo V
≤0.15 ≤1.00 3.75 -4.75 ≤0.045 ≤0.03 9.00 -10.50 19.00 -22.00 ≤ ≥ ≤ ≥ ≤ ≥ ≤ ≥ ≤ ≥ ≤ ≥ ≤ ≥

Mechanical Properties of steel grade B 30 70C

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)
722 (≥) 925 (≥) 31 12 22 Solution and Aging, Annealing, Ausaging, Q+T,etc 411

Physical Properties of steel grade B 30 70C

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
44 - -     0.23 -  
614 671 - 44.3 143   -  
421 - 24 43.2   323 321

Heat Treatment of steel grade B 30 70C

Heat treated : 1124°C - 1414°C

Technological Curves of steel grade B 30 70C

Cross Reference Table (Equivalent Grade) of B 30 70C

Grade Standard Country Application
1.4307
1.2307
307
K30736
K30736
AWS E307
UNS W30710
AWS ER307
UNS S30780
T11307
T11307
1.2307
1.2307
1.4307
1.4307

Relevant standard of B 30 70C

B 30 (2012) Standard Specification for Copper Alloys in Ingot Form B-30-(2012).pdf
A 958 Grade SC 8630 Class 70/36 B 30 72C
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