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AISI 431 Stainless Steel vs. S21603 Stainless Steel

Both AISI 431 stainless steel and S21603 stainless steel are iron alloys. They have 82% of their average alloy composition in common. There are 29 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is AISI 431 stainless steel and the bottom bar is S21603 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 250
200
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 15 to 17
45
Fatigue Strength, MPa 430 to 610
360
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
79
Shear Strength, MPa 550 to 840
490
Tensile Strength: Ultimate (UTS), MPa 890 to 1380
690
Tensile Strength: Yield (Proof), MPa 710 to 1040
390

Thermal Properties

Latent Heat of Fusion, J/g 280
290
Maximum Temperature: Corrosion, °C 400
420
Maximum Temperature: Mechanical, °C 850
990
Melting Completion (Liquidus), °C 1510
1420
Melting Onset (Solidus), °C 1450
1380
Specific Heat Capacity, J/kg-K 480
480
Thermal Expansion, µm/m-K 12
17

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
17
Density, g/cm3 7.7
7.7
Embodied Carbon, kg CO2/kg material 2.2
3.6
Embodied Energy, MJ/kg 31
50
Embodied Water, L/kg 120
160

Common Calculations

PREN (Pitting Resistance) 16
34
Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 180
270
Resilience: Unit (Modulus of Resilience), kJ/m3 1270 to 2770
380
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 32 to 50
25
Strength to Weight: Bending, points 27 to 36
22
Thermal Shock Resistance, points 28 to 43
15

Alloy Composition

Carbon (C), % 0 to 0.2
0 to 0.030
Chromium (Cr), % 15 to 17
17.5 to 22
Iron (Fe), % 78.2 to 83.8
57.6 to 67.8
Manganese (Mn), % 0 to 1.0
7.5 to 9.0
Molybdenum (Mo), % 0
2.0 to 3.0
Nickel (Ni), % 1.3 to 2.5
5.0 to 7.0
Nitrogen (N), % 0
0.25 to 0.5
Phosphorus (P), % 0 to 0.040
0 to 0.045
Silicon (Si), % 0 to 1.0
0 to 0.75
Sulfur (S), % 0 to 0.030
0 to 0.030