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AISI 321H Stainless Steel vs. S20910 Stainless Steel

Both AISI 321H stainless steel and S20910 stainless steel are iron alloys. They have 87% of their average alloy composition in common. There are 32 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 AISI 321H stainless steel and the bottom bar is S20910 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
230 to 290
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 40
14 to 39
Fatigue Strength, MPa 200
310 to 460
Poisson's Ratio 0.28
0.28
Reduction in Area, % 51
56 to 62
Shear Modulus, GPa 77
79
Shear Strength, MPa 400
500 to 570
Tensile Strength: Ultimate (UTS), MPa 580
780 to 940
Tensile Strength: Yield (Proof), MPa 230
430 to 810

Thermal Properties

Latent Heat of Fusion, J/g 290
300
Maximum Temperature: Corrosion, °C 480
460
Maximum Temperature: Mechanical, °C 940
1080
Melting Completion (Liquidus), °C 1430
1420
Melting Onset (Solidus), °C 1380
1380
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 15
13
Thermal Expansion, µm/m-K 17
16

Otherwise Unclassified Properties

Base Metal Price, % relative 16
22
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 3.2
4.8
Embodied Energy, MJ/kg 46
68
Embodied Water, L/kg 140
180

Common Calculations

PREN (Pitting Resistance) 18
34
Resilience: Ultimate (Unit Rupture Work), MJ/m3 190
120 to 260
Resilience: Unit (Modulus of Resilience), kJ/m3 140
460 to 1640
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 21
28 to 33
Strength to Weight: Bending, points 20
24 to 27
Thermal Diffusivity, mm2/s 4.0
3.6
Thermal Shock Resistance, points 12
17 to 21

Alloy Composition

Carbon (C), % 0.040 to 0.1
0 to 0.060
Chromium (Cr), % 17 to 19
20.5 to 23.5
Iron (Fe), % 65.4 to 74
52.1 to 62.1
Manganese (Mn), % 0 to 2.0
4.0 to 6.0
Molybdenum (Mo), % 0
1.5 to 3.0
Nickel (Ni), % 9.0 to 12
11.5 to 13.5
Niobium (Nb), % 0
0.1 to 0.3
Nitrogen (N), % 0
0.2 to 0.4
Phosphorus (P), % 0 to 0.045
0 to 0.040
Silicon (Si), % 0 to 0.75
0 to 0.75
Sulfur (S), % 0 to 0.030
0 to 0.030
Titanium (Ti), % 0 to 0.7
0
Vanadium (V), % 0
0.1 to 0.3