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S21600 Stainless Steel vs. S40920 Stainless Steel

Both S21600 stainless steel and S40920 stainless steel are iron alloys. Both are furnished in the annealed condition. They have 75% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is S21600 stainless steel and the bottom bar is S40920 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200
150
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 46
22
Fatigue Strength, MPa 360
130
Poisson's Ratio 0.28
0.28
Rockwell B Hardness 86
77
Shear Modulus, GPa 79
75
Shear Strength, MPa 500
270
Tensile Strength: Ultimate (UTS), MPa 710
430
Tensile Strength: Yield (Proof), MPa 390
190

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 1420
1450
Melting Onset (Solidus), °C 1380
1400
Specific Heat Capacity, J/kg-K 480
480
Thermal Expansion, µm/m-K 17
10

Otherwise Unclassified Properties

Base Metal Price, % relative 17
6.5
Density, g/cm3 7.7
7.7
Embodied Carbon, kg CO2/kg material 3.6
2.0
Embodied Energy, MJ/kg 50
28
Embodied Water, L/kg 160
94

Common Calculations

PREN (Pitting Resistance) 34
11
Resilience: Ultimate (Unit Rupture Work), MJ/m3 270
78
Resilience: Unit (Modulus of Resilience), kJ/m3 370
97
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 25
15
Strength to Weight: Bending, points 23
16
Thermal Shock Resistance, points 15
15

Alloy Composition

Carbon (C), % 0 to 0.080
0 to 0.030
Chromium (Cr), % 17.5 to 22
10.5 to 11.7
Iron (Fe), % 57.6 to 67.8
85.1 to 89.4
Manganese (Mn), % 7.5 to 9.0
0 to 1.0
Molybdenum (Mo), % 2.0 to 3.0
0
Nickel (Ni), % 5.0 to 7.0
0 to 0.5
Niobium (Nb), % 0
0 to 0.1
Nitrogen (N), % 0.25 to 0.5
0 to 0.030
Phosphorus (P), % 0 to 0.045
0 to 0.040
Silicon (Si), % 0 to 0.75
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.020
Titanium (Ti), % 0
0.15 to 0.5