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SAE-AISI T2 Steel vs. AISI 439 Stainless Steel

Both SAE-AISI T2 steel and AISI 439 stainless steel are iron alloys. They have 78% of their average alloy composition in common. There are 22 material properties with values for both materials. Properties with values for just one material (14, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI T2 steel and the bottom bar is AISI 439 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 79
77
Tensile Strength: Ultimate (UTS), MPa 780 to 2150
490

Thermal Properties

Latent Heat of Fusion, J/g 250
280
Melting Completion (Liquidus), °C 1820
1510
Melting Onset (Solidus), °C 1760
1430
Specific Heat Capacity, J/kg-K 410
480
Thermal Conductivity, W/m-K 19
25
Thermal Expansion, µm/m-K 12
11

Otherwise Unclassified Properties

Base Metal Price, % relative 46
9.0
Density, g/cm3 9.3
7.7
Embodied Carbon, kg CO2/kg material 11
2.3
Embodied Energy, MJ/kg 170
34
Embodied Water, L/kg 98
120

Common Calculations

PREN (Pitting Resistance) 36
18
Stiffness to Weight: Axial, points 12
14
Stiffness to Weight: Bending, points 21
25
Strength to Weight: Axial, points 23 to 64
18
Strength to Weight: Bending, points 20 to 40
18
Thermal Diffusivity, mm2/s 4.9
6.7
Thermal Shock Resistance, points 23 to 65
16

Alloy Composition

Aluminum (Al), % 0
0 to 0.15
Carbon (C), % 0.8 to 0.9
0 to 0.030
Chromium (Cr), % 3.8 to 4.5
17 to 19
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 70.8 to 75.8
77.1 to 82.8
Manganese (Mn), % 0.2 to 0.4
0 to 1.0
Molybdenum (Mo), % 0 to 1.0
0
Nickel (Ni), % 0 to 0.3
0 to 0.5
Nitrogen (N), % 0
0 to 0.030
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 0.2 to 0.4
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030
Titanium (Ti), % 0
0.2 to 1.1
Tungsten (W), % 17.5 to 19
0
Vanadium (V), % 1.8 to 2.4
0