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EN 1.4581 Stainless Steel vs. AISI 304Cu Stainless Steel

Both EN 1.4581 stainless steel and AISI 304Cu stainless steel are iron alloys. They have a moderately high 95% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is EN 1.4581 stainless steel and the bottom bar is AISI 304Cu stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150
160
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 28
45
Fatigue Strength, MPa 150
190
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 78
76
Tensile Strength: Ultimate (UTS), MPa 510
530
Tensile Strength: Yield (Proof), MPa 210
210

Thermal Properties

Latent Heat of Fusion, J/g 300
290
Maximum Temperature: Corrosion, °C 490
420
Maximum Temperature: Mechanical, °C 990
930
Melting Completion (Liquidus), °C 1440
1410
Melting Onset (Solidus), °C 1400
1370
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 15
13
Thermal Expansion, µm/m-K 16
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.3
2.8

Otherwise Unclassified Properties

Base Metal Price, % relative 21
16
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 4.2
3.0
Embodied Energy, MJ/kg 59
43
Embodied Water, L/kg 160
150

Common Calculations

PREN (Pitting Resistance) 26
18
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
190
Resilience: Unit (Modulus of Resilience), kJ/m3 110
110
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 18
19
Strength to Weight: Bending, points 18
19
Thermal Diffusivity, mm2/s 3.9
3.5
Thermal Shock Resistance, points 12
12

Alloy Composition

Carbon (C), % 0 to 0.070
0 to 0.030
Chromium (Cr), % 18 to 20
17 to 19
Copper (Cu), % 0
3.0 to 4.0
Iron (Fe), % 61.4 to 71
63.9 to 72
Manganese (Mn), % 0 to 1.5
0 to 2.0
Molybdenum (Mo), % 2.0 to 2.5
0
Nickel (Ni), % 9.0 to 12
8.0 to 10
Niobium (Nb), % 0 to 1.0
0
Phosphorus (P), % 0 to 0.040
0 to 0.045
Silicon (Si), % 0 to 1.5
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030