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S31730 Stainless Steel vs. SAE-AISI 1084 Steel

Both S31730 stainless steel and SAE-AISI 1084 steel are iron alloys. They have 57% of their average alloy composition in common. There are 27 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is S31730 stainless steel and the bottom bar is SAE-AISI 1084 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180
220 to 270
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 40
11
Fatigue Strength, MPa 170
320 to 370
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
72
Shear Strength, MPa 370
470 to 550
Tensile Strength: Ultimate (UTS), MPa 540
780 to 930
Tensile Strength: Yield (Proof), MPa 200
510 to 600

Thermal Properties

Latent Heat of Fusion, J/g 290
240
Maximum Temperature: Mechanical, °C 990
400
Melting Completion (Liquidus), °C 1430
1450
Melting Onset (Solidus), °C 1390
1410
Specific Heat Capacity, J/kg-K 470
470
Thermal Expansion, µm/m-K 16
12

Otherwise Unclassified Properties

Base Metal Price, % relative 24
1.8
Density, g/cm3 8.0
7.8
Embodied Carbon, kg CO2/kg material 4.6
1.4
Embodied Energy, MJ/kg 63
19
Embodied Water, L/kg 180
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 170
81 to 89
Resilience: Unit (Modulus of Resilience), kJ/m3 99
700 to 960
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 19
28 to 33
Strength to Weight: Bending, points 18
24 to 27
Thermal Shock Resistance, points 12
25 to 30

Alloy Composition

Carbon (C), % 0 to 0.030
0.8 to 0.93
Chromium (Cr), % 17 to 19
0
Copper (Cu), % 4.0 to 5.0
0
Iron (Fe), % 52.4 to 61
98.1 to 98.6
Manganese (Mn), % 0 to 2.0
0.6 to 0.9
Molybdenum (Mo), % 3.0 to 4.0
0
Nickel (Ni), % 15 to 16.5
0
Nitrogen (N), % 0 to 0.045
0
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0
Sulfur (S), % 0 to 0.010
0 to 0.050