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SAE-AISI T4 Steel vs. SAE-AISI S7 Steel

Both SAE-AISI T4 steel and SAE-AISI S7 steel are iron alloys. They have 75% of their average alloy composition in common. There are 22 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI T4 steel and the bottom bar is SAE-AISI S7 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
190
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 80
74
Tensile Strength: Ultimate (UTS), MPa 800 to 2140
670 to 2030

Thermal Properties

Latent Heat of Fusion, J/g 250
260
Melting Completion (Liquidus), °C 1810
1460
Melting Onset (Solidus), °C 1750
1420
Specific Heat Capacity, J/kg-K 410
470
Thermal Conductivity, W/m-K 21
40
Thermal Expansion, µm/m-K 12
12

Otherwise Unclassified Properties

Base Metal Price, % relative 55
5.0
Density, g/cm3 9.4
7.8
Embodied Carbon, kg CO2/kg material 8.5
2.3
Embodied Energy, MJ/kg 130
31
Embodied Water, L/kg 120
65

Common Calculations

PREN (Pitting Resistance) 37
8.4
Stiffness to Weight: Axial, points 12
14
Stiffness to Weight: Bending, points 21
25
Strength to Weight: Axial, points 24 to 64
24 to 72
Strength to Weight: Bending, points 20 to 39
22 to 46
Thermal Diffusivity, mm2/s 5.4
11
Thermal Shock Resistance, points 24 to 64
22 to 66

Alloy Composition

Carbon (C), % 0.7 to 0.8
0.45 to 0.55
Chromium (Cr), % 3.8 to 4.5
3.0 to 3.5
Cobalt (Co), % 4.3 to 5.8
0
Copper (Cu), % 0 to 0.25
0 to 0.25
Iron (Fe), % 66.3 to 72.3
91.6 to 94.9
Manganese (Mn), % 0.1 to 0.4
0.2 to 0.9
Molybdenum (Mo), % 0.4 to 1.0
1.3 to 1.8
Nickel (Ni), % 0 to 0.3
0
Phosphorus (P), % 0 to 0.030
0 to 0.030
Silicon (Si), % 0.2 to 0.4
0.2 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 17.5 to 19
0
Vanadium (V), % 0.8 to 1.2
0 to 0.3

Comparable Variants