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S39274 Stainless Steel vs. S31254 Stainless Steel

Both S39274 stainless steel and S31254 stainless steel are iron alloys. Both are furnished in the annealed condition. They have 85% of their average alloy composition in common. There are 34 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 S39274 stainless steel and the bottom bar is S31254 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 270
190
Elastic (Young's, Tensile) Modulus, GPa 210
200
Elongation at Break, % 17
40
Fatigue Strength, MPa 380
290
Poisson's Ratio 0.27
0.28
Reduction in Area, % 34
56
Shear Modulus, GPa 81
80
Shear Strength, MPa 560
490
Tensile Strength: Ultimate (UTS), MPa 900
720
Tensile Strength: Yield (Proof), MPa 620
330

Thermal Properties

Latent Heat of Fusion, J/g 300
300
Maximum Temperature: Corrosion, °C 450
420
Maximum Temperature: Mechanical, °C 1100
1090
Melting Completion (Liquidus), °C 1480
1460
Melting Onset (Solidus), °C 1430
1420
Specific Heat Capacity, J/kg-K 470
460
Thermal Conductivity, W/m-K 16
14
Thermal Expansion, µm/m-K 13
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.4
2.3

Otherwise Unclassified Properties

Base Metal Price, % relative 24
28
Density, g/cm3 8.0
8.0
Embodied Carbon, kg CO2/kg material 4.3
5.5
Embodied Energy, MJ/kg 60
74
Embodied Water, L/kg 180
190

Common Calculations

PREN (Pitting Resistance) 43
44
Resilience: Ultimate (Unit Rupture Work), MJ/m3 140
240
Resilience: Unit (Modulus of Resilience), kJ/m3 940
270
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 32
25
Strength to Weight: Bending, points 26
22
Thermal Diffusivity, mm2/s 4.2
3.8
Thermal Shock Resistance, points 25
15

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.020
Chromium (Cr), % 24 to 26
19.5 to 20.5
Copper (Cu), % 0.2 to 0.8
0.5 to 1.0
Iron (Fe), % 57 to 65.6
51.4 to 56.3
Manganese (Mn), % 0 to 1.0
0 to 1.0
Molybdenum (Mo), % 2.5 to 3.5
6.0 to 6.5
Nickel (Ni), % 6.0 to 8.0
17.5 to 18.5
Nitrogen (N), % 0.24 to 0.32
0.18 to 0.22
Phosphorus (P), % 0 to 0.030
0 to 0.030
Silicon (Si), % 0 to 0.8
0 to 0.8
Sulfur (S), % 0 to 0.020
0 to 0.010
Tungsten (W), % 1.5 to 2.5
0