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S44626 Stainless Steel vs. S31730 Stainless Steel

Both S44626 stainless steel and S31730 stainless steel are iron alloys. Both are furnished in the annealed condition. They have 77% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is S44626 stainless steel and the bottom bar is S31730 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
180
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 23
40
Fatigue Strength, MPa 230
170
Poisson's Ratio 0.27
0.28
Rockwell B Hardness 83
78
Shear Modulus, GPa 80
77
Shear Strength, MPa 340
370
Tensile Strength: Ultimate (UTS), MPa 540
540
Tensile Strength: Yield (Proof), MPa 350
200

Thermal Properties

Latent Heat of Fusion, J/g 300
290
Maximum Temperature: Corrosion, °C 560
420
Maximum Temperature: Mechanical, °C 1100
990
Melting Completion (Liquidus), °C 1440
1430
Melting Onset (Solidus), °C 1390
1390
Specific Heat Capacity, J/kg-K 480
470
Thermal Expansion, µm/m-K 11
16

Otherwise Unclassified Properties

Base Metal Price, % relative 14
24
Density, g/cm3 7.7
8.0
Embodied Carbon, kg CO2/kg material 2.9
4.6
Embodied Energy, MJ/kg 42
63
Embodied Water, L/kg 160
180

Common Calculations

PREN (Pitting Resistance) 30
30
Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
170
Resilience: Unit (Modulus of Resilience), kJ/m3 300
99
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 26
24
Strength to Weight: Axial, points 19
19
Strength to Weight: Bending, points 19
18
Thermal Shock Resistance, points 18
12

Alloy Composition

Carbon (C), % 0 to 0.060
0 to 0.030
Chromium (Cr), % 25 to 27
17 to 19
Copper (Cu), % 0 to 0.2
4.0 to 5.0
Iron (Fe), % 68.1 to 74.1
52.4 to 61
Manganese (Mn), % 0 to 0.75
0 to 2.0
Molybdenum (Mo), % 0.75 to 1.5
3.0 to 4.0
Nickel (Ni), % 0 to 0.5
15 to 16.5
Nitrogen (N), % 0 to 0.040
0 to 0.045
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 0.75
0 to 1.0
Sulfur (S), % 0 to 0.020
0 to 0.010
Titanium (Ti), % 0.2 to 1.0
0