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EN 1.4986 Stainless Steel vs. EN 1.4434 Stainless Steel

Both EN 1.4986 stainless steel and EN 1.4434 stainless steel are iron alloys. They have a moderately high 95% of their average alloy composition in common.

For each property being compared, the top bar is EN 1.4986 stainless steel and the bottom bar is EN 1.4434 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 230
200
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 18
41
Fatigue Strength, MPa 350
270
Impact Strength: V-Notched Charpy, J 57
90
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
79
Shear Strength, MPa 460
450
Tensile Strength: Ultimate (UTS), MPa 750
660
Tensile Strength: Yield (Proof), MPa 560
310

Thermal Properties

Latent Heat of Fusion, J/g 290
290
Maximum Temperature: Corrosion, °C 520
420
Maximum Temperature: Mechanical, °C 940
980
Melting Completion (Liquidus), °C 1450
1450
Melting Onset (Solidus), °C 1400
1400
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 15
15
Thermal Expansion, µm/m-K 17
16

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 25
21
Density, g/cm3 7.9
7.9
Embodied Carbon, kg CO2/kg material 4.8
4.2
Embodied Energy, MJ/kg 67
57
Embodied Water, L/kg 150
160

Common Calculations

PREN (Pitting Resistance) 22
32
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
220
Resilience: Unit (Modulus of Resilience), kJ/m3 790
240
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 26
23
Strength to Weight: Bending, points 23
21
Thermal Diffusivity, mm2/s 4.0
4.0
Thermal Shock Resistance, points 16
15

Alloy Composition

Boron (B), % 0.050 to 0.1
0
Carbon (C), % 0.040 to 0.1
0 to 0.030
Chromium (Cr), % 15.5 to 17.5
16.5 to 19.5
Iron (Fe), % 59.4 to 66.6
59.2 to 69.9
Manganese (Mn), % 0 to 1.5
0 to 2.0
Molybdenum (Mo), % 1.6 to 2.0
3.0 to 4.0
Nickel (Ni), % 15.5 to 17.5
10.5 to 14
Niobium (Nb), % 0.4 to 1.2
0
Nitrogen (N), % 0
0.1 to 0.2
Phosphorus (P), % 0 to 0.045
0 to 0.045
Silicon (Si), % 0.3 to 0.6
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.015