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SAE-AISI T15 Steel vs. S44725 Stainless Steel

Both SAE-AISI T15 steel and S44725 stainless steel are iron alloys. They have 76% of their average alloy composition in common. There are 22 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI T15 steel and the bottom bar is S44725 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 76
81
Tensile Strength: Ultimate (UTS), MPa 830 to 2240
500

Thermal Properties

Latent Heat of Fusion, J/g 250
290
Melting Completion (Liquidus), °C 1690
1450
Melting Onset (Solidus), °C 1640
1410
Specific Heat Capacity, J/kg-K 430
480
Thermal Conductivity, W/m-K 21
17
Thermal Expansion, µm/m-K 12
11

Otherwise Unclassified Properties

Base Metal Price, % relative 43
15
Density, g/cm3 8.7
7.7
Embodied Carbon, kg CO2/kg material 16
3.1
Embodied Energy, MJ/kg 250
44
Embodied Water, L/kg 140
170

Common Calculations

PREN (Pitting Resistance) 27
33
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 22
25
Strength to Weight: Axial, points 26 to 71
18
Strength to Weight: Bending, points 22 to 43
18
Thermal Diffusivity, mm2/s 5.6
4.6
Thermal Shock Resistance, points 26 to 70
16

Alloy Composition

Carbon (C), % 1.5 to 1.6
0 to 0.015
Chromium (Cr), % 3.8 to 5.0
25 to 28.5
Cobalt (Co), % 4.8 to 5.3
0
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 67.5 to 73.5
67.6 to 73.5
Manganese (Mn), % 0.15 to 0.4
0 to 0.4
Molybdenum (Mo), % 0 to 1.0
1.5 to 2.5
Nickel (Ni), % 0 to 0.3
0 to 0.3
Niobium (Nb), % 0
0 to 0.26
Nitrogen (N), % 0
0 to 0.018
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 0.15 to 0.4
0 to 0.040
Sulfur (S), % 0 to 0.030
0 to 0.020
Titanium (Ti), % 0
0 to 0.26
Tungsten (W), % 11.8 to 13
0
Vanadium (V), % 4.5 to 5.3
0