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EN 1.4439 Stainless Steel vs. EN 1.4317 Stainless Steel

Both EN 1.4439 stainless steel and EN 1.4317 stainless steel are iron alloys. They have 81% 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 1.4439 stainless steel and the bottom bar is EN 1.4317 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 40
17
Fatigue Strength, MPa 270
380
Impact Strength: V-Notched Charpy, J 90
56
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 79
76
Tensile Strength: Ultimate (UTS), MPa 680
860
Tensile Strength: Yield (Proof), MPa 310
630

Thermal Properties

Latent Heat of Fusion, J/g 290
280
Maximum Temperature: Corrosion, °C 410
390
Maximum Temperature: Mechanical, °C 980
770
Melting Completion (Liquidus), °C 1460
1440
Melting Onset (Solidus), °C 1410
1400
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 14
26
Thermal Expansion, µm/m-K 16
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
2.7
Electrical Conductivity: Equal Weight (Specific), % IACS 2.3
3.2

Otherwise Unclassified Properties

Base Metal Price, % relative 22
10
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 4.5
2.4
Embodied Energy, MJ/kg 61
33
Embodied Water, L/kg 160
110

Common Calculations

PREN (Pitting Resistance) 35
14
Resilience: Ultimate (Unit Rupture Work), MJ/m3 220
130
Resilience: Unit (Modulus of Resilience), kJ/m3 240
1010
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 24
31
Strength to Weight: Bending, points 22
26
Thermal Diffusivity, mm2/s 3.8
7.0
Thermal Shock Resistance, points 15
30

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.060
Chromium (Cr), % 16.5 to 18.5
12 to 13.5
Iron (Fe), % 58.7 to 66.9
78.7 to 84.5
Manganese (Mn), % 0 to 2.0
0 to 1.0
Molybdenum (Mo), % 4.0 to 5.0
0 to 0.7
Nickel (Ni), % 12.5 to 14.5
3.5 to 5.0
Nitrogen (N), % 0.12 to 0.22
0
Phosphorus (P), % 0 to 0.045
0 to 0.035
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.025