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S31730 Stainless Steel vs. S40910 Stainless Steel

Both S31730 stainless steel and S40910 stainless steel are iron alloys. Both are furnished in the annealed condition. They have 69% 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 S31730 stainless steel and the bottom bar is S40910 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180
160
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 40
23
Fatigue Strength, MPa 170
130
Poisson's Ratio 0.28
0.28
Rockwell B Hardness 78
76
Shear Modulus, GPa 77
75
Shear Strength, MPa 370
270
Tensile Strength: Ultimate (UTS), MPa 540
430
Tensile Strength: Yield (Proof), MPa 200
190

Thermal Properties

Latent Heat of Fusion, J/g 290
270
Maximum Temperature: Corrosion, °C 420
440
Maximum Temperature: Mechanical, °C 990
710
Melting Completion (Liquidus), °C 1430
1450
Melting Onset (Solidus), °C 1390
1410
Specific Heat Capacity, J/kg-K 470
480
Thermal Expansion, µm/m-K 16
10

Otherwise Unclassified Properties

Base Metal Price, % relative 24
7.0
Density, g/cm3 8.0
7.8
Embodied Carbon, kg CO2/kg material 4.6
2.0
Embodied Energy, MJ/kg 63
28
Embodied Water, L/kg 180
94

Common Calculations

PREN (Pitting Resistance) 30
11
Resilience: Ultimate (Unit Rupture Work), MJ/m3 170
80
Resilience: Unit (Modulus of Resilience), kJ/m3 99
94
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 19
16
Strength to Weight: Bending, points 18
16
Thermal Shock Resistance, points 12
16

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.030
Chromium (Cr), % 17 to 19
10.5 to 11.7
Copper (Cu), % 4.0 to 5.0
0
Iron (Fe), % 52.4 to 61
85 to 89.5
Manganese (Mn), % 0 to 2.0
0 to 1.0
Molybdenum (Mo), % 3.0 to 4.0
0
Nickel (Ni), % 15 to 16.5
0 to 0.5
Niobium (Nb), % 0
0 to 0.17
Nitrogen (N), % 0 to 0.045
0 to 0.030
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.010
0 to 0.020
Titanium (Ti), % 0
0 to 0.5