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SAE-AISI T1 Steel vs. S44725 Stainless Steel

Both SAE-AISI T1 steel and S44725 stainless steel are iron alloys. They have 75% 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 T1 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 80
81
Tensile Strength: Ultimate (UTS), MPa 770 to 2130
500

Thermal Properties

Latent Heat of Fusion, J/g 240
290
Melting Completion (Liquidus), °C 1810
1450
Melting Onset (Solidus), °C 1750
1410
Specific Heat Capacity, J/kg-K 410
480
Thermal Conductivity, W/m-K 20
17
Thermal Expansion, µm/m-K 12
11

Otherwise Unclassified Properties

Base Metal Price, % relative 45
15
Density, g/cm3 9.3
7.7
Embodied Carbon, kg CO2/kg material 8.2
3.1
Embodied Energy, MJ/kg 130
44
Embodied Water, L/kg 90
170

Common Calculations

PREN (Pitting Resistance) 34
33
Stiffness to Weight: Axial, points 12
15
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 5.2
4.6
Thermal Shock Resistance, points 23 to 64
16

Alloy Composition

Carbon (C), % 0.65 to 0.8
0 to 0.015
Chromium (Cr), % 3.8 to 4.5
25 to 28.5
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 73.2 to 77.2
67.6 to 73.5
Manganese (Mn), % 0.1 to 0.4
0 to 0.4
Molybdenum (Mo), % 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), % 0.2 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), % 17.3 to 18.8
0
Vanadium (V), % 0.9 to 1.3
0