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SAE-AISI A7 Steel vs. AISI 201LN Stainless Steel

Both SAE-AISI A7 steel and AISI 201LN stainless steel are iron alloys. They have 77% of their average alloy composition in common. There are 22 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI A7 steel and the bottom bar is AISI 201LN stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 72
77
Tensile Strength: Ultimate (UTS), MPa 800 to 2150
740 to 1060

Thermal Properties

Latent Heat of Fusion, J/g 260
280
Melting Completion (Liquidus), °C 1470
1410
Melting Onset (Solidus), °C 1430
1370
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 37
15
Thermal Expansion, µm/m-K 12
17

Otherwise Unclassified Properties

Base Metal Price, % relative 10
12
Density, g/cm3 7.7
7.7
Embodied Carbon, kg CO2/kg material 13
2.6
Embodied Energy, MJ/kg 200
38
Embodied Water, L/kg 100
140

Common Calculations

PREN (Pitting Resistance) 11
20
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 29 to 77
27 to 38
Strength to Weight: Bending, points 25 to 48
24 to 30
Thermal Diffusivity, mm2/s 10
4.0
Thermal Shock Resistance, points 27 to 72
16 to 23

Alloy Composition

Carbon (C), % 2.0 to 2.9
0 to 0.030
Chromium (Cr), % 5.0 to 5.8
16 to 17.5
Copper (Cu), % 0 to 0.25
0 to 1.0
Iron (Fe), % 81.4 to 87.7
67.9 to 73.5
Manganese (Mn), % 0 to 0.8
6.4 to 7.5
Molybdenum (Mo), % 0.9 to 1.4
0
Nickel (Ni), % 0 to 0.3
4.0 to 5.0
Nitrogen (N), % 0
0.1 to 0.25
Phosphorus (P), % 0 to 0.030
0 to 0.045
Silicon (Si), % 0 to 0.5
0 to 0.75
Sulfur (S), % 0 to 0.030
0 to 0.015
Tungsten (W), % 0.5 to 1.5
0
Vanadium (V), % 3.9 to 5.2
0

Comparable Variants