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S31730 Stainless Steel vs. S31254 Stainless Steel

Both S31730 stainless steel and S31254 stainless steel are iron alloys. Both are furnished in the annealed condition. They have a moderately high 93% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is S31730 stainless steel and the bottom bar is S31254 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180
190
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 40
40
Fatigue Strength, MPa 170
290
Poisson's Ratio 0.28
0.28
Rockwell B Hardness 78
84
Shear Modulus, GPa 77
80
Shear Strength, MPa 370
490
Tensile Strength: Ultimate (UTS), MPa 540
720
Tensile Strength: Yield (Proof), MPa 200
330

Thermal Properties

Latent Heat of Fusion, J/g 290
300
Maximum Temperature: Corrosion, °C 420
420
Maximum Temperature: Mechanical, °C 990
1090
Melting Completion (Liquidus), °C 1430
1460
Melting Onset (Solidus), °C 1390
1420
Specific Heat Capacity, J/kg-K 470
460
Thermal Expansion, µm/m-K 16
17

Otherwise Unclassified Properties

Base Metal Price, % relative 24
28
Density, g/cm3 8.0
8.0
Embodied Carbon, kg CO2/kg material 4.6
5.5
Embodied Energy, MJ/kg 63
74
Embodied Water, L/kg 180
190

Common Calculations

PREN (Pitting Resistance) 30
44
Resilience: Ultimate (Unit Rupture Work), MJ/m3 170
240
Resilience: Unit (Modulus of Resilience), kJ/m3 99
270
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 19
25
Strength to Weight: Bending, points 18
22
Thermal Shock Resistance, points 12
15

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.020
Chromium (Cr), % 17 to 19
19.5 to 20.5
Copper (Cu), % 4.0 to 5.0
0.5 to 1.0
Iron (Fe), % 52.4 to 61
51.4 to 56.3
Manganese (Mn), % 0 to 2.0
0 to 1.0
Molybdenum (Mo), % 3.0 to 4.0
6.0 to 6.5
Nickel (Ni), % 15 to 16.5
17.5 to 18.5
Nitrogen (N), % 0 to 0.045
0.18 to 0.22
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0 to 1.0
0 to 0.8
Sulfur (S), % 0 to 0.010
0 to 0.010