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EN 1.4578 Stainless Steel vs. EN 1.4986 Stainless Steel

Both EN 1.4578 stainless steel and EN 1.4986 stainless steel are iron alloys. They have a moderately high 93% of their average alloy composition in common.

For each property being compared, the top bar is EN 1.4578 stainless steel and the bottom bar is EN 1.4986 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
230
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 51
18
Fatigue Strength, MPa 200
350
Impact Strength: V-Notched Charpy, J 90
57
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
77
Shear Strength, MPa 400
460
Tensile Strength: Ultimate (UTS), MPa 550
750
Tensile Strength: Yield (Proof), MPa 200
560

Thermal Properties

Latent Heat of Fusion, J/g 290
290
Maximum Temperature: Corrosion, °C 410
520
Maximum Temperature: Mechanical, °C 930
940
Melting Completion (Liquidus), °C 1430
1450
Melting Onset (Solidus), °C 1390
1400
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 14
15
Thermal Expansion, µm/m-K 16
17

Electrical Properties

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

Otherwise Unclassified Properties

Base Metal Price, % relative 19
25
Density, g/cm3 7.9
7.9
Embodied Carbon, kg CO2/kg material 3.7
4.8
Embodied Energy, MJ/kg 51
67
Embodied Water, L/kg 160
150

Common Calculations

PREN (Pitting Resistance) 25
22
Resilience: Ultimate (Unit Rupture Work), MJ/m3 220
120
Resilience: Unit (Modulus of Resilience), kJ/m3 100
790
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 19
26
Strength to Weight: Bending, points 19
23
Thermal Diffusivity, mm2/s 3.9
4.0
Thermal Shock Resistance, points 12
16

Alloy Composition

Boron (B), % 0
0.050 to 0.1
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
59.4 to 66.6
Manganese (Mn), % 0 to 2.0
0 to 1.5
Molybdenum (Mo), % 2.0 to 2.5
1.6 to 2.0
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
Phosphorus (P), % 0 to 0.045
0 to 0.045
Silicon (Si), % 0 to 1.0
0.3 to 0.6
Sulfur (S), % 0 to 0.015
0 to 0.030