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S31803 Stainless Steel vs. S39277 Stainless Steel

Both S31803 stainless steel and S39277 stainless steel are iron alloys. Both are furnished in the annealed condition. They have a moderately high 92% of their average alloy composition in common. There are 34 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is S31803 stainless steel and the bottom bar is S39277 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 260
250
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 29
28
Fatigue Strength, MPa 370
480
Poisson's Ratio 0.27
0.27
Reduction in Area, % 50
57
Shear Modulus, GPa 80
80
Shear Strength, MPa 460
600
Tensile Strength: Ultimate (UTS), MPa 710
930
Tensile Strength: Yield (Proof), MPa 500
660

Thermal Properties

Latent Heat of Fusion, J/g 300
300
Maximum Temperature: Corrosion, °C 430
450
Maximum Temperature: Mechanical, °C 1060
1100
Melting Completion (Liquidus), °C 1450
1460
Melting Onset (Solidus), °C 1400
1410
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 16
16
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 17
23
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 3.6
4.2
Embodied Energy, MJ/kg 49
59
Embodied Water, L/kg 160
180

Common Calculations

PREN (Pitting Resistance) 34
43
Resilience: Ultimate (Unit Rupture Work), MJ/m3 180
240
Resilience: Unit (Modulus of Resilience), kJ/m3 630
1070
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 25
33
Strength to Weight: Bending, points 23
27
Thermal Diffusivity, mm2/s 4.3
4.2
Thermal Shock Resistance, points 20
26

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.025
Chromium (Cr), % 21 to 23
24 to 26
Copper (Cu), % 0
1.2 to 2.0
Iron (Fe), % 63.7 to 71.9
56.8 to 64.3
Manganese (Mn), % 0 to 2.0
0 to 0.8
Molybdenum (Mo), % 2.5 to 3.5
3.0 to 4.0
Nickel (Ni), % 4.5 to 6.5
6.5 to 8.0
Nitrogen (N), % 0.080 to 0.2
0.23 to 0.33
Phosphorus (P), % 0 to 0.030
0 to 0.025
Silicon (Si), % 0 to 1.0
0 to 0.8
Sulfur (S), % 0 to 0.020
0 to 0.0020
Tungsten (W), % 0
0.8 to 1.2