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SAE-AISI T5 Steel vs. SAE-AISI M7 Steel

Both SAE-AISI T5 steel and SAE-AISI M7 steel are iron alloys. They have 75% of their average alloy composition in common.

For each property being compared, the top bar is SAE-AISI T5 steel and the bottom bar is SAE-AISI M7 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
200
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 80
77
Tensile Strength: Ultimate (UTS), MPa 860 to 2140
760 to 2210

Thermal Properties

Latent Heat of Fusion, J/g 250
270
Melting Completion (Liquidus), °C 1810
1560
Melting Onset (Solidus), °C 1750
1510
Specific Heat Capacity, J/kg-K 410
450
Thermal Conductivity, W/m-K 21
28
Thermal Expansion, µm/m-K 11
12

Otherwise Unclassified Properties

Base Metal Price, % relative 60
18
Density, g/cm3 9.4
8.1
Embodied Carbon, kg CO2/kg material 11
8.9
Embodied Energy, MJ/kg 170
130
Embodied Water, L/kg 140
100

Common Calculations

PREN (Pitting Resistance) 37
35
Stiffness to Weight: Axial, points 12
14
Stiffness to Weight: Bending, points 21
24
Strength to Weight: Axial, points 25 to 63
26 to 76
Strength to Weight: Bending, points 21 to 39
23 to 47
Thermal Diffusivity, mm2/s 5.5
7.8
Thermal Shock Resistance, points 26 to 66
24 to 69

Alloy Composition

Carbon (C), % 0.75 to 0.85
1.0 to 1.1
Chromium (Cr), % 3.8 to 5.0
3.5 to 4.0
Cobalt (Co), % 7.0 to 9.5
0
Copper (Cu), % 0 to 0.25
0 to 0.25
Iron (Fe), % 60.6 to 68.3
79.8 to 83.8
Manganese (Mn), % 0.2 to 0.4
0.15 to 0.4
Molybdenum (Mo), % 0.5 to 1.3
8.2 to 9.2
Nickel (Ni), % 0 to 0.3
0 to 0.3
Phosphorus (P), % 0 to 0.030
0 to 0.030
Silicon (Si), % 0.2 to 0.4
0.2 to 0.55
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 17.5 to 19
1.4 to 2.1
Vanadium (V), % 1.8 to 2.4
1.8 to 2.3

Comparable Variants