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EN 1.4578 Stainless Steel vs. EN 1.4945 Stainless Steel

Both EN 1.4578 stainless steel and EN 1.4945 stainless steel are iron alloys. They have a moderately high 90% 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 1.4578 stainless steel and the bottom bar is EN 1.4945 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
200 to 220
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 51
19 to 34
Fatigue Strength, MPa 200
230 to 350
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
77
Shear Strength, MPa 400
430 to 460
Tensile Strength: Ultimate (UTS), MPa 550
640 to 740
Tensile Strength: Yield (Proof), MPa 200
290 to 550

Thermal Properties

Latent Heat of Fusion, J/g 290
290
Maximum Temperature: Corrosion, °C 410
520
Maximum Temperature: Mechanical, °C 930
920
Melting Completion (Liquidus), °C 1430
1490
Melting Onset (Solidus), °C 1390
1440
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 14
14
Thermal Expansion, µm/m-K 16
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.3
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 2.6
3.2

Otherwise Unclassified Properties

Base Metal Price, % relative 19
30
Density, g/cm3 7.9
8.1
Embodied Carbon, kg CO2/kg material 3.7
5.0
Embodied Energy, MJ/kg 51
73
Embodied Water, L/kg 160
150

Common Calculations

PREN (Pitting Resistance) 25
23
Resilience: Ultimate (Unit Rupture Work), MJ/m3 220
130 to 180
Resilience: Unit (Modulus of Resilience), kJ/m3 100
210 to 760
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 19
22 to 25
Strength to Weight: Bending, points 19
20 to 22
Thermal Diffusivity, mm2/s 3.9
3.7
Thermal Shock Resistance, points 12
14 to 16

Alloy Composition

Carbon (C), % 0 to 0.040
0.040 to 0.1
Chromium (Cr), % 16.5 to 17.5
15.5 to 17.5
Copper (Cu), % 3.0 to 3.5
0
Iron (Fe), % 62.3 to 68.5
57.9 to 65.7
Manganese (Mn), % 0 to 2.0
0 to 1.5
Molybdenum (Mo), % 2.0 to 2.5
0
Nickel (Ni), % 10 to 11
15.5 to 17.5
Niobium (Nb), % 0
0.4 to 1.2
Nitrogen (N), % 0 to 0.1
0.060 to 0.14
Phosphorus (P), % 0 to 0.045
0 to 0.035
Silicon (Si), % 0 to 1.0
0.3 to 0.6
Sulfur (S), % 0 to 0.015
0 to 0.015
Tungsten (W), % 0
2.5 to 3.5