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B 439 FDCT-1802-K31

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B 439 FDCT-1802-K22 B 439 FDCT-1802-K39
#B-4

Description

USA SAE B 439 (2012), B 439 FDCT-1802-K31 Specialsteel Standard Specification for Iron-Base Powder Metallurgy (PM) Bearings (Oil Impregnated) and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Specialsteel: B 439 FDCT-1802-K31
Category Class Grade Type Standard Country Application
Steel GradesSpecialsteel B 439 FDCT-1802-K31 Precipitation-Hardening SAE USA Standard Specification for Iron-Base Powder Metallurgy (PM) Bearings (Oil Impregnated)

Chemical composition(mass fraction)(wt.%) of the B 439 FDCT-1802-K31

C Si Mn P S Ni Cr Al Cu Ti Fe Mo Co
≤0.01 ≤0.05 ≤1.50 ≤0.04 ≤0.01 ≤remaining 0.50 -1.50 0.10 -0.50 ≤0.50 ≤ ≥ 1.00 -6.00 26.00 -30.00 ≤2.50

Mechanical Properties of steel grade B 439 FDCT-1802-K31

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)
283 (≥) 372 (≥) 22 23 11 Solution and Aging, Annealing, Ausaging, Q+T,etc 413

Physical Properties of steel grade B 439 FDCT-1802-K31

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
11 - -     0.32 -  
884 144 - 21.3 212   -  
478 - 44 42.2   234 442

Heat Treatment of steel grade B 439 FDCT-1802-K31

Heat treated : 1196°C - 1347°C

Technological Curves of steel grade B 439 FDCT-1802-K31

Cross Reference Table (Equivalent Grade) of B 439 FDCT-1802-K31

Grade Standard Country Application
B-4
ASTM B-4
ASTM B-4
ASTM B-4

Relevant standard of B 439 FDCT-1802-K31

B 439 (2012) Standard Specification for Iron-Base Powder Metallurgy (PM) Bearings (Oil Impregnated) B-439-(2012).pdf
B 439 FDCT-1802-K22 B 439 FDCT-1802-K39
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Jiangyou Longhai Special Steel Co.,Ltd.

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