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S31730 Stainless Steel vs. AISI 405 Stainless Steel

Both S31730 stainless steel and AISI 405 stainless steel are iron alloys. Both are furnished in the annealed condition. They have 71% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is S31730 stainless steel and the bottom bar is AISI 405 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180
170
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 40
22
Fatigue Strength, MPa 170
130
Poisson's Ratio 0.28
0.28
Rockwell B Hardness 78
76
Shear Modulus, GPa 77
76
Shear Strength, MPa 370
300
Tensile Strength: Ultimate (UTS), MPa 540
470
Tensile Strength: Yield (Proof), MPa 200
200

Thermal Properties

Latent Heat of Fusion, J/g 290
280
Maximum Temperature: Corrosion, °C 420
390
Maximum Temperature: Mechanical, °C 990
820
Melting Completion (Liquidus), °C 1430
1530
Melting Onset (Solidus), °C 1390
1480
Specific Heat Capacity, J/kg-K 470
480
Thermal Expansion, µm/m-K 16
11

Otherwise Unclassified Properties

Base Metal Price, % relative 24
7.0
Density, g/cm3 8.0
7.7
Embodied Carbon, kg CO2/kg material 4.6
2.0
Embodied Energy, MJ/kg 63
28
Embodied Water, L/kg 180
100

Common Calculations

PREN (Pitting Resistance) 30
13
Resilience: Ultimate (Unit Rupture Work), MJ/m3 170
84
Resilience: Unit (Modulus of Resilience), kJ/m3 99
100
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 19
17
Strength to Weight: Bending, points 18
17
Thermal Shock Resistance, points 12
16

Alloy Composition

Aluminum (Al), % 0
0.1 to 0.3
Carbon (C), % 0 to 0.030
0 to 0.080
Chromium (Cr), % 17 to 19
11.5 to 14.5
Copper (Cu), % 4.0 to 5.0
0
Iron (Fe), % 52.4 to 61
82.5 to 88.4
Manganese (Mn), % 0 to 2.0
0 to 1.0
Molybdenum (Mo), % 3.0 to 4.0
0
Nickel (Ni), % 15 to 16.5
0 to 0.6
Nitrogen (N), % 0 to 0.045
0
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.010
0 to 0.030