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EN 1.4901 Stainless Steel vs. EN 1.4578 Stainless Steel

Both EN 1.4901 stainless steel and EN 1.4578 stainless steel are iron alloys. They have 76% of their average alloy composition in common. There are 33 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is EN 1.4901 stainless steel and the bottom bar is EN 1.4578 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 19
51
Fatigue Strength, MPa 310
200
Impact Strength: V-Notched Charpy, J 38
90
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
77
Shear Strength, MPa 460
400
Tensile Strength: Ultimate (UTS), MPa 740
550
Tensile Strength: Yield (Proof), MPa 490
200

Thermal Properties

Latent Heat of Fusion, J/g 260
290
Maximum Temperature: Corrosion, °C 380
410
Maximum Temperature: Mechanical, °C 650
930
Melting Completion (Liquidus), °C 1490
1430
Melting Onset (Solidus), °C 1450
1390
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 26
14
Thermal Expansion, µm/m-K 12
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.2
2.3
Electrical Conductivity: Equal Weight (Specific), % IACS 9.3
2.6

Otherwise Unclassified Properties

Base Metal Price, % relative 11
19
Density, g/cm3 7.9
7.9
Embodied Carbon, kg CO2/kg material 2.8
3.7
Embodied Energy, MJ/kg 40
51
Embodied Water, L/kg 89
160

Common Calculations

PREN (Pitting Resistance) 14
25
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
220
Resilience: Unit (Modulus of Resilience), kJ/m3 620
100
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 26
19
Strength to Weight: Bending, points 23
19
Thermal Diffusivity, mm2/s 6.9
3.9
Thermal Shock Resistance, points 23
12

Alloy Composition

Aluminum (Al), % 0 to 0.020
0
Boron (B), % 0.0010 to 0.0060
0
Carbon (C), % 0.070 to 0.13
0 to 0.040
Chromium (Cr), % 8.5 to 9.5
16.5 to 17.5
Copper (Cu), % 0
3.0 to 3.5
Iron (Fe), % 85.8 to 89.1
62.3 to 68.5
Manganese (Mn), % 0.3 to 0.6
0 to 2.0
Molybdenum (Mo), % 0.3 to 0.6
2.0 to 2.5
Nickel (Ni), % 0 to 0.4
10 to 11
Niobium (Nb), % 0.040 to 0.090
0
Nitrogen (N), % 0.030 to 0.070
0 to 0.1
Phosphorus (P), % 0 to 0.020
0 to 0.045
Silicon (Si), % 0 to 0.5
0 to 1.0
Sulfur (S), % 0 to 0.010
0 to 0.015
Titanium (Ti), % 0 to 0.010
0
Tungsten (W), % 1.5 to 2.0
0
Vanadium (V), % 0.15 to 0.25
0
Zirconium (Zr), % 0 to 0.010
0