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EN 1.4578 Stainless Steel vs. AISI 321H Stainless Steel

Both EN 1.4578 stainless steel and AISI 321H stainless steel are iron alloys. They have a moderately high 94% of their average alloy composition in common. There are 33 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 EN 1.4578 stainless steel and the bottom bar is AISI 321H stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
190
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 51
40
Fatigue Strength, MPa 200
200
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
77
Shear Strength, MPa 400
400
Tensile Strength: Ultimate (UTS), MPa 550
580
Tensile Strength: Yield (Proof), MPa 200
230

Thermal Properties

Latent Heat of Fusion, J/g 290
290
Maximum Temperature: Corrosion, °C 410
480
Maximum Temperature: Mechanical, °C 930
940
Melting Completion (Liquidus), °C 1430
1430
Melting Onset (Solidus), °C 1390
1380
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 14
15
Thermal Expansion, µm/m-K 16
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.3
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.6
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 19
16
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 3.7
3.2
Embodied Energy, MJ/kg 51
46
Embodied Water, L/kg 160
140

Common Calculations

PREN (Pitting Resistance) 25
18
Resilience: Ultimate (Unit Rupture Work), MJ/m3 220
190
Resilience: Unit (Modulus of Resilience), kJ/m3 100
140
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 19
21
Strength to Weight: Bending, points 19
20
Thermal Diffusivity, mm2/s 3.9
4.0
Thermal Shock Resistance, points 12
12

Alloy Composition

Carbon (C), % 0 to 0.040
0.040 to 0.1
Chromium (Cr), % 16.5 to 17.5
17 to 19
Copper (Cu), % 3.0 to 3.5
0
Iron (Fe), % 62.3 to 68.5
65.4 to 74
Manganese (Mn), % 0 to 2.0
0 to 2.0
Molybdenum (Mo), % 2.0 to 2.5
0
Nickel (Ni), % 10 to 11
9.0 to 12
Nitrogen (N), % 0 to 0.1
0
Phosphorus (P), % 0 to 0.045
0 to 0.045
Silicon (Si), % 0 to 1.0
0 to 0.75
Sulfur (S), % 0 to 0.015
0 to 0.030
Titanium (Ti), % 0
0 to 0.7