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SAE-AISI T1 Steel vs. SAE-AISI A7 Steel

Both SAE-AISI T1 steel and SAE-AISI A7 steel are iron alloys. They have 83% of their average alloy composition in common.

For each property being compared, the top bar is SAE-AISI T1 steel and the bottom bar is SAE-AISI A7 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 80
72
Tensile Strength: Ultimate (UTS), MPa 770 to 2130
800 to 2150

Thermal Properties

Latent Heat of Fusion, J/g 240
260
Melting Completion (Liquidus), °C 1810
1470
Melting Onset (Solidus), °C 1750
1430
Specific Heat Capacity, J/kg-K 410
470
Thermal Conductivity, W/m-K 20
37
Thermal Expansion, µm/m-K 12
12

Otherwise Unclassified Properties

Base Metal Price, % relative 45
10
Density, g/cm3 9.3
7.7
Embodied Carbon, kg CO2/kg material 8.2
13
Embodied Energy, MJ/kg 130
200
Embodied Water, L/kg 90
100

Common Calculations

PREN (Pitting Resistance) 34
11
Stiffness to Weight: Axial, points 12
13
Stiffness to Weight: Bending, points 21
25
Strength to Weight: Axial, points 23 to 64
29 to 77
Strength to Weight: Bending, points 20 to 40
25 to 48
Thermal Diffusivity, mm2/s 5.2
10
Thermal Shock Resistance, points 23 to 64
27 to 72

Alloy Composition

Carbon (C), % 0.65 to 0.8
2.0 to 2.9
Chromium (Cr), % 3.8 to 4.5
5.0 to 5.8
Copper (Cu), % 0 to 0.25
0 to 0.25
Iron (Fe), % 73.2 to 77.2
81.4 to 87.7
Manganese (Mn), % 0.1 to 0.4
0 to 0.8
Molybdenum (Mo), % 0
0.9 to 1.4
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 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 17.3 to 18.8
0.5 to 1.5
Vanadium (V), % 0.9 to 1.3
3.9 to 5.2

Comparable Variants