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S31730 Stainless Steel vs. N08330 Stainless Steel

Both S31730 stainless steel and N08330 stainless steel are iron alloys. Both are furnished in the annealed condition. They have 79% 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 S31730 stainless steel and the bottom bar is N08330 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180
180
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 40
34
Fatigue Strength, MPa 170
190
Poisson's Ratio 0.28
0.28
Rockwell B Hardness 78
80
Shear Modulus, GPa 77
76
Shear Strength, MPa 370
360
Tensile Strength: Ultimate (UTS), MPa 540
550
Tensile Strength: Yield (Proof), MPa 200
230

Thermal Properties

Latent Heat of Fusion, J/g 290
310
Maximum Temperature: Corrosion, °C 420
420
Maximum Temperature: Mechanical, °C 990
1050
Melting Completion (Liquidus), °C 1430
1390
Melting Onset (Solidus), °C 1390
1340
Specific Heat Capacity, J/kg-K 470
480
Thermal Expansion, µm/m-K 16
16

Otherwise Unclassified Properties

Base Metal Price, % relative 24
32
Density, g/cm3 8.0
8.0
Embodied Carbon, kg CO2/kg material 4.6
5.4
Embodied Energy, MJ/kg 63
77
Embodied Water, L/kg 180
190

Common Calculations

PREN (Pitting Resistance) 30
19
Resilience: Ultimate (Unit Rupture Work), MJ/m3 170
150
Resilience: Unit (Modulus of Resilience), kJ/m3 99
140
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 19
19
Strength to Weight: Bending, points 18
18
Thermal Shock Resistance, points 12
13

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.080
Chromium (Cr), % 17 to 19
17 to 20
Copper (Cu), % 4.0 to 5.0
0 to 1.0
Iron (Fe), % 52.4 to 61
38.3 to 48.3
Lead (Pb), % 0
0 to 0.0050
Manganese (Mn), % 0 to 2.0
0 to 2.0
Molybdenum (Mo), % 3.0 to 4.0
0
Nickel (Ni), % 15 to 16.5
34 to 37
Nitrogen (N), % 0 to 0.045
0
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0 to 1.0
0.75 to 1.5
Sulfur (S), % 0 to 0.010
0 to 0.030
Tin (Sn), % 0
0 to 0.025