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A 646 Grade Marage 250

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M-252 Marage 250
#Marage-250

Description

USA SAE A 646/A 646M (2011), A 646 Grade Marage 250 Specialsteel Premium Quality Alloy Steel Blooms and Billets for Aircraft and Aerospace Forgings and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Specialsteel: A 646 Grade Marage 250
Category Class Grade Type Standard Country Application
Steel GradesSpecialsteel A 646 Grade Marage 250 Precipitation-Hardening SAE USA Premium Quality Alloy Steel Blooms and Billets for Aircraft and Aerospace Forgings

Chemical composition(mass fraction)(wt.%) of the A 646 Grade Marage 250

C Si Mn Ni Cr Al Cu Ti Fe Mo Co
≤0.03 ≤0.10 ≤0.10 ≤18.00 ≤ ≥ ≤0.10 ≤ ≥ ≤0.40 ≤ ≥ ≤5.00 ≤8.00

Mechanical Properties of steel grade A 646 Grade Marage 250

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)
748 (≥) 482 (≥) 13 21 12 Solution and Aging, Annealing, Ausaging, Q+T,etc 114

Physical Properties of steel grade A 646 Grade Marage 250

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
34 - -     0.13 -  
687 366 - 41.3 313   -  
373 - 14 33.2   124 224

Heat Treatment of steel grade A 646 Grade Marage 250

Heat treated : 1772°C - 1141°C

Technological Curves of steel grade A 646 Grade Marage 250

Relevant standard of A 646 Grade Marage 250

A 646/A 646M (2011) Premium Quality Alloy Steel Blooms and Billets for Aircraft and Aerospace Forgings A-646-A-646M-(2011).pdf
M-252 Marage 250
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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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