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S31727 Stainless Steel vs. S44330 Stainless Steel

Both S31727 stainless steel and S44330 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 (5, in this case) are not shown.

For each property being compared, the top bar is S31727 stainless steel and the bottom bar is S44330 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
160
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 40
25
Fatigue Strength, MPa 240
160
Poisson's Ratio 0.28
0.27
Rockwell B Hardness 83
79
Shear Modulus, GPa 78
78
Shear Strength, MPa 430
280
Tensile Strength: Ultimate (UTS), MPa 630
440
Tensile Strength: Yield (Proof), MPa 270
230

Thermal Properties

Latent Heat of Fusion, J/g 290
290
Maximum Temperature: Corrosion, °C 420
560
Maximum Temperature: Mechanical, °C 1010
990
Melting Completion (Liquidus), °C 1440
1440
Melting Onset (Solidus), °C 1390
1390
Specific Heat Capacity, J/kg-K 470
480
Thermal Expansion, µm/m-K 16
10

Otherwise Unclassified Properties

Base Metal Price, % relative 24
13
Density, g/cm3 8.0
7.7
Embodied Carbon, kg CO2/kg material 4.7
2.8
Embodied Energy, MJ/kg 64
40
Embodied Water, L/kg 180
140

Common Calculations

PREN (Pitting Resistance) 35
22
Resilience: Ultimate (Unit Rupture Work), MJ/m3 200
91
Resilience: Unit (Modulus of Resilience), kJ/m3 190
140
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 22
16
Strength to Weight: Bending, points 20
17
Thermal Shock Resistance, points 14
16

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.025
Chromium (Cr), % 17.5 to 19
20 to 23
Copper (Cu), % 2.8 to 4.0
0.3 to 0.8
Iron (Fe), % 53.7 to 61.3
72.5 to 79.7
Manganese (Mn), % 0 to 1.0
0 to 1.0
Molybdenum (Mo), % 3.8 to 4.5
0
Nickel (Ni), % 14.5 to 16.5
0
Niobium (Nb), % 0
0 to 0.8
Nitrogen (N), % 0.15 to 0.21
0 to 0.025
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030
Titanium (Ti), % 0
0 to 0.8