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S44725 Stainless Steel vs. S31254 Stainless Steel

Both S44725 stainless steel and S31254 stainless steel are iron alloys. Both are furnished in the annealed condition. They have 76% 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 S44725 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, % 22
40
Fatigue Strength, MPa 210
290
Poisson's Ratio 0.27
0.28
Rockwell B Hardness 84
84
Shear Modulus, GPa 81
80
Shear Strength, MPa 320
490
Tensile Strength: Ultimate (UTS), MPa 500
720
Tensile Strength: Yield (Proof), MPa 310
330

Thermal Properties

Latent Heat of Fusion, J/g 290
300
Maximum Temperature: Corrosion, °C 500
420
Maximum Temperature: Mechanical, °C 1100
1090
Melting Completion (Liquidus), °C 1450
1460
Melting Onset (Solidus), °C 1410
1420
Specific Heat Capacity, J/kg-K 480
460
Thermal Conductivity, W/m-K 17
14
Thermal Expansion, µm/m-K 11
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.8
2.3

Otherwise Unclassified Properties

Base Metal Price, % relative 15
28
Density, g/cm3 7.7
8.0
Embodied Carbon, kg CO2/kg material 3.1
5.5
Embodied Energy, MJ/kg 44
74
Embodied Water, L/kg 170
190

Common Calculations

PREN (Pitting Resistance) 33
44
Resilience: Ultimate (Unit Rupture Work), MJ/m3 99
240
Resilience: Unit (Modulus of Resilience), kJ/m3 240
270
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 18
25
Strength to Weight: Bending, points 18
22
Thermal Diffusivity, mm2/s 4.6
3.8
Thermal Shock Resistance, points 16
15

Alloy Composition

Carbon (C), % 0 to 0.015
0 to 0.020
Chromium (Cr), % 25 to 28.5
19.5 to 20.5
Copper (Cu), % 0
0.5 to 1.0
Iron (Fe), % 67.6 to 73.5
51.4 to 56.3
Manganese (Mn), % 0 to 0.4
0 to 1.0
Molybdenum (Mo), % 1.5 to 2.5
6.0 to 6.5
Nickel (Ni), % 0 to 0.3
17.5 to 18.5
Niobium (Nb), % 0 to 0.26
0
Nitrogen (N), % 0 to 0.018
0.18 to 0.22
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0 to 0.040
0 to 0.8
Sulfur (S), % 0 to 0.020
0 to 0.010
Titanium (Ti), % 0 to 0.26
0