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A 791 Grade 25-4-4

Description

USA SAE A 791/A 791M, A 791 Grade 25-4-4 Specialsteel Aluminum-Zinc Alloy-Coated Wire Strand and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Specialsteel: A 791 Grade 25-4-4
Category Class Grade Type Standard Country Application
Steel GradesSpecialsteel A 791 Grade 25-4-4 Precipitation-Hardening SAE USA Aluminum-Zinc Alloy-Coated Wire Strand

Chemical composition(mass fraction)(wt.%) of the A 791 Grade 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 791 Grade 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)
342 (≥) 847 (≥) 24 11 41 Solution and Aging, Annealing, Ausaging, Q+T,etc 232

Physical Properties of steel grade A 791 Grade 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
33 - -     0.22 -  
541 737 - 22.3 433   -  
186 - 14 13.2   313 444

Heat Treatment of steel grade A 791 Grade 25-4-4

Heat treated : 1934°C - 1311°C

Technological Curves of steel grade A 791 Grade 25-4-4

Cross Reference Table (Equivalent Grade) of A 791 Grade 25-4-4

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

Relevant standard of A 791 Grade 25-4-4

A 791/A 791M Aluminum-Zinc Alloy-Coated Wire Strand A-791-A-791M.pdf

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