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SAE-AISI T5 Steel vs. SAE-AISI T4 Steel

Both SAE-AISI T5 steel and SAE-AISI T4 steel are iron alloys. They have a very high 95% 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 T4 steel.

Metric UnitsUS Customary Units

Mechanical Properties

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

Thermal Properties

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

Otherwise Unclassified Properties

Base Metal Price, % relative 60
55
Density, g/cm3 9.4
9.4
Embodied Carbon, kg CO2/kg material 11
8.5
Embodied Energy, MJ/kg 170
130
Embodied Water, L/kg 140
120

Common Calculations

PREN (Pitting Resistance) 37
37
Stiffness to Weight: Axial, points 12
12
Stiffness to Weight: Bending, points 21
21
Strength to Weight: Axial, points 25 to 63
24 to 64
Strength to Weight: Bending, points 21 to 39
20 to 39
Thermal Diffusivity, mm2/s 5.5
5.4
Thermal Shock Resistance, points 26 to 66
24 to 64

Alloy Composition

Carbon (C), % 0.75 to 0.85
0.7 to 0.8
Chromium (Cr), % 3.8 to 5.0
3.8 to 4.5
Cobalt (Co), % 7.0 to 9.5
4.3 to 5.8
Copper (Cu), % 0 to 0.25
0 to 0.25
Iron (Fe), % 60.6 to 68.3
66.3 to 72.3
Manganese (Mn), % 0.2 to 0.4
0.1 to 0.4
Molybdenum (Mo), % 0.5 to 1.3
0.4 to 1.0
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 0.4
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 17.5 to 19
17.5 to 19
Vanadium (V), % 1.8 to 2.4
0.8 to 1.2

Comparable Variants