MakeItFrom.com
Menu (ESC)

SAE-AISI A7 Steel vs. SAE-AISI H25 Steel

Both SAE-AISI A7 steel and SAE-AISI H25 steel are iron alloys. They have 86% of their average alloy composition in common.

For each property being compared, the top bar is SAE-AISI A7 steel and the bottom bar is SAE-AISI H25 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 72
79
Tensile Strength: Ultimate (UTS), MPa 800 to 2150
710 to 1620

Thermal Properties

Latent Heat of Fusion, J/g 260
250
Melting Completion (Liquidus), °C 1470
1750
Melting Onset (Solidus), °C 1430
1700
Specific Heat Capacity, J/kg-K 470
420
Thermal Conductivity, W/m-K 37
26
Thermal Expansion, µm/m-K 12
12

Otherwise Unclassified Properties

Base Metal Price, % relative 10
38
Density, g/cm3 7.7
9.1
Embodied Carbon, kg CO2/kg material 13
6.2
Embodied Energy, MJ/kg 200
93
Embodied Water, L/kg 100
83

Common Calculations

PREN (Pitting Resistance) 11
29
Stiffness to Weight: Axial, points 13
12
Stiffness to Weight: Bending, points 25
22
Strength to Weight: Axial, points 29 to 77
22 to 50
Strength to Weight: Bending, points 25 to 48
20 to 34
Thermal Diffusivity, mm2/s 10
6.7
Thermal Shock Resistance, points 27 to 72
22 to 49

Alloy Composition

Carbon (C), % 2.0 to 2.9
0.22 to 0.32
Chromium (Cr), % 5.0 to 5.8
3.8 to 4.5
Copper (Cu), % 0 to 0.25
0 to 0.25
Iron (Fe), % 81.4 to 87.7
77.2 to 81.3
Manganese (Mn), % 0 to 0.8
0.15 to 0.4
Molybdenum (Mo), % 0.9 to 1.4
0
Nickel (Ni), % 0 to 0.3
0 to 0.3
Phosphorus (P), % 0 to 0.030
0 to 0.030
Silicon (Si), % 0 to 0.5
0.15 to 0.4
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 0.5 to 1.5
14 to 16
Vanadium (V), % 3.9 to 5.2
0.4 to 0.6

Comparable Variants