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S31100 Stainless Steel vs. S40977 Stainless Steel

Both S31100 stainless steel and S40977 stainless steel are iron alloys. Both are furnished in the annealed condition. They have 79% of their average alloy composition in common. There are 33 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 S31100 stainless steel and the bottom bar is S40977 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 270
160
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 4.5
21
Fatigue Strength, MPa 330
200
Poisson's Ratio 0.27
0.28
Shear Modulus, GPa 79
76
Shear Strength, MPa 580
320
Tensile Strength: Ultimate (UTS), MPa 1000
510
Tensile Strength: Yield (Proof), MPa 710
310

Thermal Properties

Latent Heat of Fusion, J/g 300
270
Maximum Temperature: Corrosion, °C 470
390
Maximum Temperature: Mechanical, °C 1100
720
Melting Completion (Liquidus), °C 1420
1440
Melting Onset (Solidus), °C 1380
1400
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 16
25
Thermal Expansion, µm/m-K 13
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 2.4
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 16
6.5
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 3.1
1.9
Embodied Energy, MJ/kg 44
27
Embodied Water, L/kg 170
97

Common Calculations

PREN (Pitting Resistance) 26
12
Resilience: Ultimate (Unit Rupture Work), MJ/m3 40
92
Resilience: Unit (Modulus of Resilience), kJ/m3 1240
250
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 36
18
Strength to Weight: Bending, points 29
18
Thermal Diffusivity, mm2/s 4.2
6.7
Thermal Shock Resistance, points 28
18

Alloy Composition

Carbon (C), % 0 to 0.060
0 to 0.030
Chromium (Cr), % 25 to 27
10.5 to 12.5
Iron (Fe), % 63.6 to 69
83.9 to 89.2
Manganese (Mn), % 0 to 1.0
0 to 1.5
Nickel (Ni), % 6.0 to 7.0
0.3 to 1.0
Nitrogen (N), % 0
0 to 0.030
Phosphorus (P), % 0 to 0.045
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.015
Titanium (Ti), % 0 to 0.25
0