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SAE-AISI T4 Steel vs. AISI 440C Stainless Steel

Both SAE-AISI T4 steel and AISI 440C 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 (9, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI T4 steel and the bottom bar is AISI 440C stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
200
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 80
76
Tensile Strength: Ultimate (UTS), MPa 800 to 2140
710 to 1970

Thermal Properties

Latent Heat of Fusion, J/g 250
280
Melting Completion (Liquidus), °C 1810
1480
Melting Onset (Solidus), °C 1750
1370
Specific Heat Capacity, J/kg-K 410
480
Thermal Conductivity, W/m-K 21
22
Thermal Expansion, µm/m-K 12
10

Otherwise Unclassified Properties

Base Metal Price, % relative 55
9.0
Density, g/cm3 9.4
7.7
Embodied Carbon, kg CO2/kg material 8.5
2.2
Embodied Energy, MJ/kg 130
31
Embodied Water, L/kg 120
120

Common Calculations

PREN (Pitting Resistance) 37
18
Stiffness to Weight: Axial, points 12
14
Stiffness to Weight: Bending, points 21
25
Strength to Weight: Axial, points 24 to 64
26 to 71
Strength to Weight: Bending, points 20 to 39
23 to 46
Thermal Diffusivity, mm2/s 5.4
6.0
Thermal Shock Resistance, points 24 to 64
26 to 71

Alloy Composition

Carbon (C), % 0.7 to 0.8
1.0 to 1.2
Chromium (Cr), % 3.8 to 4.5
16 to 18
Cobalt (Co), % 4.3 to 5.8
0
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 66.3 to 72.3
78 to 83.1
Manganese (Mn), % 0.1 to 0.4
0 to 1.0
Molybdenum (Mo), % 0.4 to 1.0
0 to 0.75
Nickel (Ni), % 0 to 0.3
0
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 0.015
Tungsten (W), % 17.5 to 19
0
Vanadium (V), % 0.8 to 1.2
0

Comparable Variants