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S15500 Stainless Steel vs. AISI 431 Stainless Steel

Both S15500 stainless steel and AISI 431 stainless steel are iron alloys. They have a moderately high 94% 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 S15500 stainless steel and the bottom bar is AISI 431 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 290 to 430
250
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 6.8 to 16
15 to 17
Fatigue Strength, MPa 350 to 650
430 to 610
Poisson's Ratio 0.28
0.28
Rockwell C Hardness 27 to 46
26
Shear Modulus, GPa 75
77
Shear Strength, MPa 540 to 870
550 to 840
Tensile Strength: Ultimate (UTS), MPa 890 to 1490
890 to 1380
Tensile Strength: Yield (Proof), MPa 590 to 1310
710 to 1040

Thermal Properties

Latent Heat of Fusion, J/g 280
280
Maximum Temperature: Corrosion, °C 440
400
Maximum Temperature: Mechanical, °C 820
850
Melting Completion (Liquidus), °C 1430
1510
Melting Onset (Solidus), °C 1380
1450
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 17
26
Thermal Expansion, µm/m-K 11
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
2.6
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
3.0

Otherwise Unclassified Properties

Base Metal Price, % relative 13
9.0
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 2.7
2.2
Embodied Energy, MJ/kg 39
31
Embodied Water, L/kg 130
120

Common Calculations

PREN (Pitting Resistance) 15
16
Resilience: Ultimate (Unit Rupture Work), MJ/m3 98 to 120
140 to 180
Resilience: Unit (Modulus of Resilience), kJ/m3 890 to 4460
1270 to 2770
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 32 to 53
32 to 50
Strength to Weight: Bending, points 26 to 37
27 to 36
Thermal Diffusivity, mm2/s 4.6
7.0
Thermal Shock Resistance, points 30 to 50
28 to 43

Alloy Composition

Carbon (C), % 0 to 0.070
0 to 0.2
Chromium (Cr), % 14 to 15.5
15 to 17
Copper (Cu), % 2.5 to 4.5
0
Iron (Fe), % 71.9 to 79.9
78.2 to 83.8
Manganese (Mn), % 0 to 1.0
0 to 1.0
Nickel (Ni), % 3.5 to 5.5
1.3 to 2.5
Niobium (Nb), % 0.15 to 0.45
0
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030