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AISI 201L Stainless Steel vs. SAE-AISI 4720 Steel

Both AISI 201L stainless steel and SAE-AISI 4720 steel are iron alloys. They have 74% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is AISI 201L stainless steel and the bottom bar is SAE-AISI 4720 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190 to 320
150
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 22 to 46
25
Fatigue Strength, MPa 270 to 530
260
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
73
Shear Strength, MPa 520 to 660
310
Tensile Strength: Ultimate (UTS), MPa 740 to 1040
490
Tensile Strength: Yield (Proof), MPa 290 to 790
350

Thermal Properties

Latent Heat of Fusion, J/g 280
250
Maximum Temperature: Mechanical, °C 880
410
Melting Completion (Liquidus), °C 1410
1460
Melting Onset (Solidus), °C 1370
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 15
39
Thermal Expansion, µm/m-K 17
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 2.9
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 12
2.9
Density, g/cm3 7.7
7.9
Embodied Carbon, kg CO2/kg material 2.6
1.6
Embodied Energy, MJ/kg 38
21
Embodied Water, L/kg 140
50

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 210 to 300
110
Resilience: Unit (Modulus of Resilience), kJ/m3 220 to 1570
330
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 27 to 37
17
Strength to Weight: Bending, points 24 to 30
18
Thermal Diffusivity, mm2/s 4.0
10
Thermal Shock Resistance, points 16 to 23
14

Alloy Composition

Carbon (C), % 0 to 0.030
0.17 to 0.22
Chromium (Cr), % 16 to 18
0.35 to 0.55
Iron (Fe), % 67.9 to 75
96.7 to 97.8
Manganese (Mn), % 5.5 to 7.5
0.5 to 0.7
Molybdenum (Mo), % 0
0.15 to 0.25
Nickel (Ni), % 3.5 to 5.5
0.9 to 1.2
Nitrogen (N), % 0 to 0.25
0
Phosphorus (P), % 0 to 0.045
0 to 0.035
Silicon (Si), % 0 to 0.75
0.15 to 0.35
Sulfur (S), % 0 to 0.030
0 to 0.040