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S31277 Stainless Steel vs. S40920 Stainless Steel

Both S31277 stainless steel and S40920 stainless steel are iron alloys. Both are furnished in the annealed condition. They have 53% of their average alloy composition in common. There are 28 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is S31277 stainless steel and the bottom bar is S40920 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
190
Elongation at Break, % 45
22
Fatigue Strength, MPa 380
130
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 80
75
Shear Strength, MPa 600
270
Tensile Strength: Ultimate (UTS), MPa 860
430
Tensile Strength: Yield (Proof), MPa 410
190

Thermal Properties

Latent Heat of Fusion, J/g 310
270
Maximum Temperature: Corrosion, °C 430
450
Maximum Temperature: Mechanical, °C 1100
710
Melting Completion (Liquidus), °C 1460
1450
Melting Onset (Solidus), °C 1410
1400
Specific Heat Capacity, J/kg-K 460
480
Thermal Expansion, µm/m-K 16
10

Otherwise Unclassified Properties

Base Metal Price, % relative 36
6.5
Density, g/cm3 8.1
7.7
Embodied Carbon, kg CO2/kg material 6.7
2.0
Embodied Energy, MJ/kg 90
28
Embodied Water, L/kg 220
94

Common Calculations

PREN (Pitting Resistance) 51
11
Resilience: Ultimate (Unit Rupture Work), MJ/m3 320
78
Resilience: Unit (Modulus of Resilience), kJ/m3 410
97
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 29
15
Strength to Weight: Bending, points 25
16
Thermal Shock Resistance, points 19
15

Alloy Composition

Carbon (C), % 0 to 0.020
0 to 0.030
Chromium (Cr), % 20.5 to 23
10.5 to 11.7
Copper (Cu), % 0.5 to 1.5
0
Iron (Fe), % 35.5 to 46.2
85.1 to 89.4
Manganese (Mn), % 0 to 3.0
0 to 1.0
Molybdenum (Mo), % 6.5 to 8.0
0
Nickel (Ni), % 26 to 28
0 to 0.5
Niobium (Nb), % 0
0 to 0.1
Nitrogen (N), % 0.3 to 0.4
0 to 0.030
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 0 to 0.5
0 to 1.0
Sulfur (S), % 0 to 0.010
0 to 0.020
Titanium (Ti), % 0
0.15 to 0.5