MakeItFrom.com
Menu (ESC)

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