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B 848 P/F 4220

Description

USA SAE B 848 (2005), B 848 P/F 4220 Specialsteel Standard Specification for Powder Forged (P/F) Ferrous Materials and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Specialsteel: B 848 P/F 4220
Category Class Grade Type Standard Country Application
Steel GradesSpecialsteel B 848 P/F 4220 Precipitation-Hardening SAE USA Standard Specification for Powder Forged (P/F) Ferrous Materials

Chemical composition(mass fraction)(wt.%) of the B 848 P/F 4220

C Si Mn P S Ni Cr Al Cu Ti Fe N Mo W V
≤0.22 ≤0.40 ≤0.75 ≤ ≥ ≤ ≥ ≤0.75 ≤12.50 ≤ ≥ ≤ ≥ ≤ ≥ ≤remaining ≤ ≥ ≤1.00 ≤1.00 ≤0.22

Mechanical Properties of steel grade B 848 P/F 4220

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)
154 (≥) 756 (≥) 22 42 11 Solution and Aging, Annealing, Ausaging, Q+T,etc 432

Physical Properties of steel grade B 848 P/F 4220

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
31 - -     0.34 -  
346 528 - 13.3 142   -  
642 - 34 44.2   234 312

Heat Treatment of steel grade B 848 P/F 4220

Heat treated : 1224°C - 1133°C

Technological Curves of steel grade B 848 P/F 4220

Cross Reference Table (Equivalent Grade) of B 848 P/F 4220

Relevant standard of B 848 P/F 4220

B 848 (2005) Standard Specification for Powder Forged (P/F) Ferrous Materials B-848-(2005).pdf

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