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S20910 Stainless Steel vs. AISI 321 Stainless Steel

Both S20910 stainless steel and AISI 321 stainless steel are iron alloys. They have 87% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is S20910 stainless steel and the bottom bar is AISI 321 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 230 to 290
170 to 210
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 14 to 39
34 to 50
Fatigue Strength, MPa 310 to 460
220 to 270
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 79
77
Shear Strength, MPa 500 to 570
420 to 460
Tensile Strength: Ultimate (UTS), MPa 780 to 940
590 to 690
Tensile Strength: Yield (Proof), MPa 430 to 810
220 to 350

Thermal Properties

Latent Heat of Fusion, J/g 300
290
Maximum Temperature: Corrosion, °C 460
480
Maximum Temperature: Mechanical, °C 1080
870
Melting Completion (Liquidus), °C 1420
1430
Melting Onset (Solidus), °C 1380
1400
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 13
16
Thermal Expansion, µm/m-K 16
17

Otherwise Unclassified Properties

Base Metal Price, % relative 22
16
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 4.8
3.2
Embodied Energy, MJ/kg 68
45
Embodied Water, L/kg 180
140

Common Calculations

PREN (Pitting Resistance) 34
19
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120 to 260
190 to 230
Resilience: Unit (Modulus of Resilience), kJ/m3 460 to 1640
130 to 310
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 28 to 33
21 to 25
Strength to Weight: Bending, points 24 to 27
20 to 22
Thermal Diffusivity, mm2/s 3.6
4.1
Thermal Shock Resistance, points 17 to 21
13 to 15

Alloy Composition

Carbon (C), % 0 to 0.060
0 to 0.080
Chromium (Cr), % 20.5 to 23.5
17 to 19
Iron (Fe), % 52.1 to 62.1
65.3 to 74
Manganese (Mn), % 4.0 to 6.0
0 to 2.0
Molybdenum (Mo), % 1.5 to 3.0
0
Nickel (Ni), % 11.5 to 13.5
9.0 to 12
Niobium (Nb), % 0.1 to 0.3
0
Nitrogen (N), % 0.2 to 0.4
0 to 0.1
Phosphorus (P), % 0 to 0.040
0 to 0.045
Silicon (Si), % 0 to 0.75
0 to 0.75
Sulfur (S), % 0 to 0.030
0 to 0.030
Titanium (Ti), % 0
0 to 0.7
Vanadium (V), % 0.1 to 0.3
0

Comparable Variants