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A 959 Type 25-4-4

Favorite Datasheet
A 803 Grade 25-4-4 K42544
#25-4-4

Description

USA SAE A 959 (2011), A 959 Type 25-4-4 Specialsteel Standard Guide for Specifying Harmonized Standard Grade Compositions for Wrought Stainless Steels and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Specialsteel: A 959 Type 25-4-4
Category Class Grade Type Standard Country Application
Steel GradesSpecialsteel A 959 Type 25-4-4 Precipitation-Hardening SAE USA Standard Guide for Specifying Harmonized Standard Grade Compositions for Wrought Stainless Steels

Chemical composition(mass fraction)(wt.%) of the A 959 Type 25-4-4

C Si Mn P S Ni Cr Al Cu Ti Fe N Mo
≤0.025 ≤0.75 ≤1.00 ≤0.04 ≤0.04 3.35 -4.50 24.50 -26.00 ≤ ≥ ≤0.50 ≤ ≥ ≤ ≥ ≤0.035 3.50 -4.50

Mechanical Properties of steel grade A 959 Type 25-4-4

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)
133 (≥) 243 (≥) 11 24 13 Solution and Aging, Annealing, Ausaging, Q+T,etc 424

Physical Properties of steel grade A 959 Type 25-4-4

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
22 - -     0.22 -  
129 155 - 34.3 424   -  
498 - 13 42.2   412 341

Heat Treatment of steel grade A 959 Type 25-4-4

Heat treated : 1768°C - 1127°C

Technological Curves of steel grade A 959 Type 25-4-4

Cross Reference Table (Equivalent Grade) of A 959 Type 25-4-4

Grade Standard Country Application
25-4-4
25-4-4
25-4-4

Relevant standard of A 959 Type 25-4-4

A 959 (2011) Standard Guide for Specifying Harmonized Standard Grade Compositions for Wrought Stainless Steels A-959-(2011).pdf
A 803 Grade 25-4-4 K42544
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Jiangyou Longhai Special Steel Co.,Ltd.
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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