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AISI 420 Stainless Steel vs. SAE-AISI 1144 Steel

Both AISI 420 stainless steel and SAE-AISI 1144 steel are iron alloys. They have 86% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is AISI 420 stainless steel and the bottom bar is SAE-AISI 1144 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
220 to 230
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 8.0 to 15
11 to 17
Fatigue Strength, MPa 220 to 670
280 to 430
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
72
Shear Strength, MPa 420 to 1010
460 to 510
Tensile Strength: Ultimate (UTS), MPa 690 to 1720
750 to 840
Tensile Strength: Yield (Proof), MPa 380 to 1310
420 to 690

Thermal Properties

Latent Heat of Fusion, J/g 280
250
Maximum Temperature: Mechanical, °C 620
400
Melting Completion (Liquidus), °C 1510
1450
Melting Onset (Solidus), °C 1450
1410
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 27
51
Thermal Expansion, µm/m-K 10
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.0
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 3.5
8.2

Otherwise Unclassified Properties

Base Metal Price, % relative 7.5
1.9
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.0
1.4
Embodied Energy, MJ/kg 28
19
Embodied Water, L/kg 100
47

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 88 to 130
91 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 380 to 4410
480 to 1290
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 25 to 62
27 to 30
Strength to Weight: Bending, points 22 to 41
23 to 25
Thermal Diffusivity, mm2/s 7.3
14
Thermal Shock Resistance, points 25 to 62
22 to 24

Alloy Composition

Carbon (C), % 0.15 to 0.4
0.4 to 0.48
Chromium (Cr), % 12 to 14
0
Iron (Fe), % 82.3 to 87.9
97.5 to 98
Manganese (Mn), % 0 to 1.0
1.4 to 1.7
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 0 to 0.75
0
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0
Sulfur (S), % 0 to 0.030
0.24 to 0.33