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S35140 Stainless Steel vs. S31730 Stainless Steel

Both S35140 stainless steel and S31730 stainless steel are iron alloys. Both are furnished in the annealed condition. They have 85% of their average alloy composition in common. There are 30 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 S35140 stainless steel and the bottom bar is S31730 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210
180
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 34
40
Fatigue Strength, MPa 250
170
Poisson's Ratio 0.28
0.28
Rockwell B Hardness 88
78
Shear Modulus, GPa 78
77
Shear Strength, MPa 460
370
Tensile Strength: Ultimate (UTS), MPa 690
540
Tensile Strength: Yield (Proof), MPa 310
200

Thermal Properties

Latent Heat of Fusion, J/g 300
290
Maximum Temperature: Corrosion, °C 500
420
Maximum Temperature: Mechanical, °C 1100
990
Melting Completion (Liquidus), °C 1420
1430
Melting Onset (Solidus), °C 1370
1390
Specific Heat Capacity, J/kg-K 470
470
Thermal Expansion, µm/m-K 16
16

Otherwise Unclassified Properties

Base Metal Price, % relative 31
24
Density, g/cm3 8.0
8.0
Embodied Carbon, kg CO2/kg material 5.5
4.6
Embodied Energy, MJ/kg 78
63
Embodied Water, L/kg 190
180

Common Calculations

PREN (Pitting Resistance) 28
30
Resilience: Ultimate (Unit Rupture Work), MJ/m3 190
170
Resilience: Unit (Modulus of Resilience), kJ/m3 250
99
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 24
19
Strength to Weight: Bending, points 22
18
Thermal Shock Resistance, points 16
12

Alloy Composition

Carbon (C), % 0 to 0.1
0 to 0.030
Chromium (Cr), % 20 to 22
17 to 19
Copper (Cu), % 0
4.0 to 5.0
Iron (Fe), % 44.1 to 52.7
52.4 to 61
Manganese (Mn), % 1.0 to 3.0
0 to 2.0
Molybdenum (Mo), % 1.0 to 2.0
3.0 to 4.0
Nickel (Ni), % 25 to 27
15 to 16.5
Niobium (Nb), % 0.25 to 0.75
0
Nitrogen (N), % 0.080 to 0.2
0 to 0.045
Phosphorus (P), % 0 to 0.045
0 to 0.040
Silicon (Si), % 0 to 0.75
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.010