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B 439 FG-0308-K16

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B 439 FG-0303-K12 B 439 FG-0308-K22
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Description

USA SAE B 439 (2012), B 439 FG-0308-K16 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 FG-0308-K16
Category Class Grade Type Standard Country Application
Steel GradesSpecialsteel B 439 FG-0308-K16 Precipitation-Hardening SAE USA Standard Specification for Iron-Base Powder Metallurgy (PM) Bearings (Oil Impregnated)

Chemical composition(mass fraction)(wt.%) of the B 439 FG-0308-K16

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 FG-0308-K16

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)
511 (≥) 546 (≥) 32 34 24 Solution and Aging, Annealing, Ausaging, Q+T,etc 442

Physical Properties of steel grade B 439 FG-0308-K16

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
23 - -     0.21 -  
538 291 - 22.3 234   -  
449 - 11 42.2   313 111

Heat Treatment of steel grade B 439 FG-0308-K16

Heat treated : 1139°C - 1253°C

Technological Curves of steel grade B 439 FG-0308-K16

Cross Reference Table (Equivalent Grade) of B 439 FG-0308-K16

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

Relevant standard of B 439 FG-0308-K16

B 439 (2012) Standard Specification for Iron-Base Powder Metallurgy (PM) Bearings (Oil Impregnated) B-439-(2012).pdf
B 439 FG-0303-K12 B 439 FG-0308-K22
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Jiangyou Longhai Special Steel Co.,Ltd.

Our main peoducts of steel are many kinds of special steel, like tool steel, mould steel, alloy steel, alloy constructural steel, heat-resistant steel, high speed tool steel,spring steel and bearing steel , stainless steel and so on, which have formed 12 series and more than 350 varieties with n...

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