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AISI 302B Stainless Steel vs. S31727 Stainless Steel

Both AISI 302B stainless steel and S31727 stainless steel are iron alloys. Both are furnished in the annealed condition. 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 302B stainless steel and the bottom bar is S31727 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
190
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 45
40
Fatigue Strength, MPa 210
240
Poisson's Ratio 0.28
0.28
Reduction in Area, % 57
56
Rockwell B Hardness 84
83
Shear Modulus, GPa 76
78
Shear Strength, MPa 410
430
Tensile Strength: Ultimate (UTS), MPa 580
630
Tensile Strength: Yield (Proof), MPa 230
270

Thermal Properties

Latent Heat of Fusion, J/g 320
290
Maximum Temperature: Corrosion, °C 410
420
Maximum Temperature: Mechanical, °C 930
1010
Melting Completion (Liquidus), °C 1400
1440
Melting Onset (Solidus), °C 1360
1390
Specific Heat Capacity, J/kg-K 490
470
Thermal Expansion, µm/m-K 16
16

Otherwise Unclassified Properties

Base Metal Price, % relative 15
24
Density, g/cm3 7.7
8.0
Embodied Carbon, kg CO2/kg material 3.0
4.7
Embodied Energy, MJ/kg 43
64
Embodied Water, L/kg 140
180

Common Calculations

PREN (Pitting Resistance) 19
35
Resilience: Ultimate (Unit Rupture Work), MJ/m3 210
200
Resilience: Unit (Modulus of Resilience), kJ/m3 140
190
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 21
22
Strength to Weight: Bending, points 20
20
Thermal Shock Resistance, points 13
14

Alloy Composition

Carbon (C), % 0 to 0.15
0 to 0.030
Chromium (Cr), % 17 to 19
17.5 to 19
Copper (Cu), % 0
2.8 to 4.0
Iron (Fe), % 65.7 to 73
53.7 to 61.3
Manganese (Mn), % 0 to 2.0
0 to 1.0
Molybdenum (Mo), % 0
3.8 to 4.5
Nickel (Ni), % 8.0 to 10
14.5 to 16.5
Nitrogen (N), % 0 to 0.1
0.15 to 0.21
Phosphorus (P), % 0 to 0.045
0 to 0.030
Silicon (Si), % 2.0 to 3.0
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030