S20431 Stainless Steel vs. S40975 Stainless Steel
Both S20431 stainless steel and S40975 stainless steel are iron alloys. Both are furnished in the annealed condition. They have 83% of their average alloy composition in common.
For each property being compared, the top bar is S20431 stainless steel and the bottom bar is S40975 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
Brinell Hardness | 210 | |
170 |
Elastic (Young's, Tensile) Modulus, GPa | 200 | |
190 |
Elongation at Break, % | 46 | |
22 |
Fatigue Strength, MPa | 320 | |
210 |
Poisson's Ratio | 0.28 | |
0.28 |
Rockwell B Hardness | 86 | |
81 |
Shear Modulus, GPa | 76 | |
75 |
Shear Strength, MPa | 500 | |
290 |
Tensile Strength: Ultimate (UTS), MPa | 710 | |
460 |
Tensile Strength: Yield (Proof), MPa | 350 | |
310 |
Thermal Properties
Latent Heat of Fusion, J/g | 280 | |
270 |
Maximum Temperature: Corrosion, °C | 410 | |
450 |
Maximum Temperature: Mechanical, °C | 890 | |
710 |
Melting Completion (Liquidus), °C | 1400 | |
1450 |
Melting Onset (Solidus), °C | 1360 | |
1400 |
Specific Heat Capacity, J/kg-K | 480 | |
480 |
Thermal Conductivity, W/m-K | 15 | |
26 |
Thermal Expansion, µm/m-K | 17 | |
10 |
Electrical Properties
Electrical Conductivity: Equal Volume, % IACS | 2.4 | |
2.9 |
Electrical Conductivity: Equal Weight (Specific), % IACS | 2.8 | |
3.3 |
Otherwise Unclassified Properties
Base Metal Price, % relative | 12 | |
6.5 |
Density, g/cm3 | 7.7 | |
7.8 |
Embodied Carbon, kg CO2/kg material | 2.5 | |
2.0 |
Embodied Energy, MJ/kg | 36 | |
28 |
Embodied Water, L/kg | 140 | |
95 |
Common Calculations
PREN (Pitting Resistance) | 20 | |
11 |
Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 270 | |
93 |
Resilience: Unit (Modulus of Resilience), kJ/m3 | 310 | |
250 |
Stiffness to Weight: Axial, points | 14 | |
14 |
Stiffness to Weight: Bending, points | 25 | |
25 |
Strength to Weight: Axial, points | 25 | |
17 |
Strength to Weight: Bending, points | 23 | |
17 |
Thermal Diffusivity, mm2/s | 4.0 | |
7.0 |
Thermal Shock Resistance, points | 15 | |
17 |
Alloy Composition
Carbon (C), % | 0 to 0.12 | |
0 to 0.030 |
Chromium (Cr), % | 17 to 18 | |
10.5 to 11.7 |
Copper (Cu), % | 1.5 to 3.5 | |
0 |
Iron (Fe), % | 66.1 to 74.4 | |
84.4 to 89 |
Manganese (Mn), % | 5.0 to 7.0 | |
0 to 1.0 |
Nickel (Ni), % | 2.0 to 4.0 | |
0.5 to 1.0 |
Nitrogen (N), % | 0.1 to 0.25 | |
0 to 0.030 |
Phosphorus (P), % | 0 to 0.045 | |
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 0.75 |