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AISI 348H Stainless Steel vs. S21600 Stainless Steel

Both AISI 348H stainless steel and S21600 stainless steel are iron alloys. Both are furnished in the annealed condition. They have 88% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is AISI 348H stainless steel and the bottom bar is S21600 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180
200
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 40
46
Fatigue Strength, MPa 200
360
Poisson's Ratio 0.28
0.28
Reduction in Area, % 51
56
Rockwell B Hardness 79
86
Shear Modulus, GPa 77
79
Shear Strength, MPa 400
500
Tensile Strength: Ultimate (UTS), MPa 580
710
Tensile Strength: Yield (Proof), MPa 230
390

Thermal Properties

Latent Heat of Fusion, J/g 290
290
Maximum Temperature: Corrosion, °C 500
420
Maximum Temperature: Mechanical, °C 940
990
Melting Completion (Liquidus), °C 1430
1420
Melting Onset (Solidus), °C 1390
1380
Specific Heat Capacity, J/kg-K 480
480
Thermal Expansion, µm/m-K 16
17

Otherwise Unclassified Properties

Base Metal Price, % relative 20
17
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 3.9
3.6
Embodied Energy, MJ/kg 56
50
Embodied Water, L/kg 150
160

Common Calculations

PREN (Pitting Resistance) 18
34
Resilience: Ultimate (Unit Rupture Work), MJ/m3 190
270
Resilience: Unit (Modulus of Resilience), kJ/m3 140
370
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 21
25
Strength to Weight: Bending, points 20
23
Thermal Shock Resistance, points 13
15

Alloy Composition

Carbon (C), % 0.040 to 0.1
0 to 0.080
Chromium (Cr), % 17 to 19
17.5 to 22
Cobalt (Co), % 0 to 0.2
0
Iron (Fe), % 63.8 to 73.6
57.6 to 67.8
Manganese (Mn), % 0 to 2.0
7.5 to 9.0
Molybdenum (Mo), % 0
2.0 to 3.0
Nickel (Ni), % 9.0 to 13
5.0 to 7.0
Niobium (Nb), % 0.32 to 1.0
0
Nitrogen (N), % 0
0.25 to 0.5
Phosphorus (P), % 0 to 0.045
0 to 0.045
Silicon (Si), % 0 to 0.75
0 to 0.75
Sulfur (S), % 0 to 0.030
0 to 0.030
Tantalum (Ta), % 0 to 0.1
0