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SAE-AISI A7 Steel vs. SAE-AISI 4028 Steel

Both SAE-AISI A7 steel and SAE-AISI 4028 steel are iron alloys. They have 86% of their average alloy composition in common. There are 21 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI A7 steel and the bottom bar is SAE-AISI 4028 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 72
73
Tensile Strength: Ultimate (UTS), MPa 800 to 2150
490 to 630

Thermal Properties

Latent Heat of Fusion, J/g 260
250
Melting Completion (Liquidus), °C 1470
1460
Melting Onset (Solidus), °C 1430
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 37
49
Thermal Expansion, µm/m-K 12
12

Otherwise Unclassified Properties

Base Metal Price, % relative 10
2.1
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 13
1.5
Embodied Energy, MJ/kg 200
19
Embodied Water, L/kg 100
47

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 29 to 77
17 to 22
Strength to Weight: Bending, points 25 to 48
18 to 21
Thermal Diffusivity, mm2/s 10
13
Thermal Shock Resistance, points 27 to 72
16 to 20

Alloy Composition

Carbon (C), % 2.0 to 2.9
0.25 to 0.3
Chromium (Cr), % 5.0 to 5.8
0
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 81.4 to 87.7
98.1 to 98.7
Manganese (Mn), % 0 to 0.8
0.7 to 0.9
Molybdenum (Mo), % 0.9 to 1.4
0.2 to 0.3
Nickel (Ni), % 0 to 0.3
0
Phosphorus (P), % 0 to 0.030
0 to 0.035
Silicon (Si), % 0 to 0.5
0.15 to 0.35
Sulfur (S), % 0 to 0.030
0.035 to 0.050
Tungsten (W), % 0.5 to 1.5
0
Vanadium (V), % 3.9 to 5.2
0

Comparable Variants