MakeItFrom.com
Menu (ESC)

S31730 Stainless Steel vs. S40975 Stainless Steel

Both S31730 stainless steel and S40975 stainless steel are iron alloys. Both are furnished in the annealed condition. They have 70% 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 S40975 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
210
Poisson's Ratio 0.28
0.28
Rockwell B Hardness 78
81
Shear Modulus, GPa 77
75
Shear Strength, MPa 370
290
Tensile Strength: Ultimate (UTS), MPa 540
460
Tensile Strength: Yield (Proof), MPa 200
310

Thermal Properties

Latent Heat of Fusion, J/g 290
270
Maximum Temperature: Corrosion, °C 420
450
Maximum Temperature: Mechanical, °C 990
710
Melting Completion (Liquidus), °C 1430
1450
Melting Onset (Solidus), °C 1390
1400
Specific Heat Capacity, J/kg-K 470
480
Thermal Expansion, µm/m-K 16
10

Otherwise Unclassified Properties

Base Metal Price, % relative 24
6.5
Density, g/cm3 8.0
7.8
Embodied Carbon, kg CO2/kg material 4.6
2.0
Embodied Energy, MJ/kg 63
28
Embodied Water, L/kg 180
95

Common Calculations

PREN (Pitting Resistance) 30
11
Resilience: Ultimate (Unit Rupture Work), MJ/m3 170
93
Resilience: Unit (Modulus of Resilience), kJ/m3 99
250
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
17

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.030
Chromium (Cr), % 17 to 19
10.5 to 11.7
Copper (Cu), % 4.0 to 5.0
0
Iron (Fe), % 52.4 to 61
84.4 to 89
Manganese (Mn), % 0 to 2.0
0 to 1.0
Molybdenum (Mo), % 3.0 to 4.0
0
Nickel (Ni), % 15 to 16.5
0.5 to 1.0
Nitrogen (N), % 0 to 0.045
0 to 0.030
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
Titanium (Ti), % 0
0 to 0.75