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S20431 Stainless Steel vs. AISI 430 Stainless Steel

Both S20431 stainless steel and AISI 430 stainless steel are iron alloys. Both are furnished in the annealed condition. They have 89% of their average alloy composition in common. There are 34 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 S20431 stainless steel and the bottom bar is AISI 430 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210
160
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 46
24
Fatigue Strength, MPa 320
180
Poisson's Ratio 0.28
0.28
Rockwell B Hardness 86
77
Shear Modulus, GPa 76
77
Shear Strength, MPa 500
320
Tensile Strength: Ultimate (UTS), MPa 710
500
Tensile Strength: Yield (Proof), MPa 350
260

Thermal Properties

Latent Heat of Fusion, J/g 280
280
Maximum Temperature: Corrosion, °C 410
410
Maximum Temperature: Mechanical, °C 890
870
Melting Completion (Liquidus), °C 1400
1510
Melting Onset (Solidus), °C 1360
1430
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 15
25
Thermal Expansion, µm/m-K 17
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 2.8
3.4

Otherwise Unclassified Properties

Base Metal Price, % relative 12
8.5
Density, g/cm3 7.7
7.7
Embodied Carbon, kg CO2/kg material 2.5
2.1
Embodied Energy, MJ/kg 36
30
Embodied Water, L/kg 140
120

Common Calculations

PREN (Pitting Resistance) 20
17
Resilience: Ultimate (Unit Rupture Work), MJ/m3 270
100
Resilience: Unit (Modulus of Resilience), kJ/m3 310
170
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 25
18
Strength to Weight: Bending, points 23
18
Thermal Diffusivity, mm2/s 4.0
6.7
Thermal Shock Resistance, points 15
18

Alloy Composition

Carbon (C), % 0 to 0.12
0 to 0.12
Chromium (Cr), % 17 to 18
16 to 18
Copper (Cu), % 1.5 to 3.5
0
Iron (Fe), % 66.1 to 74.4
79.1 to 84
Manganese (Mn), % 5.0 to 7.0
0 to 1.0
Nickel (Ni), % 2.0 to 4.0
0 to 0.75
Nitrogen (N), % 0.1 to 0.25
0
Phosphorus (P), % 0 to 0.045
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030