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EN 1.4959 Stainless Steel vs. EN 1.4031 Stainless Steel

Both EN 1.4959 stainless steel and EN 1.4031 stainless steel are iron alloys. They have 59% of their average alloy composition in common.

For each property being compared, the top bar is EN 1.4959 stainless steel and the bottom bar is EN 1.4031 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 40
11 to 13
Fatigue Strength, MPa 170
220 to 400
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
76
Shear Strength, MPa 430
400 to 540
Tensile Strength: Ultimate (UTS), MPa 630
670 to 900
Tensile Strength: Yield (Proof), MPa 190
390 to 730

Thermal Properties

Latent Heat of Fusion, J/g 300
280
Maximum Temperature: Corrosion, °C 510
390
Maximum Temperature: Mechanical, °C 1090
770
Melting Completion (Liquidus), °C 1400
1440
Melting Onset (Solidus), °C 1350
1400
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 12
30
Thermal Expansion, µm/m-K 15
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.7
3.1
Electrical Conductivity: Equal Weight (Specific), % IACS 2.0
3.7

Otherwise Unclassified Properties

Base Metal Price, % relative 31
7.0
Density, g/cm3 8.0
7.7
Embodied Carbon, kg CO2/kg material 5.4
1.9
Embodied Energy, MJ/kg 76
27
Embodied Water, L/kg 200
100

Common Calculations

PREN (Pitting Resistance) 21
14
Resilience: Ultimate (Unit Rupture Work), MJ/m3 190
77 to 94
Resilience: Unit (Modulus of Resilience), kJ/m3 96
380 to 1360
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 22
24 to 32
Strength to Weight: Bending, points 20
22 to 27
Thermal Diffusivity, mm2/s 3.2
8.1
Thermal Shock Resistance, points 15
23 to 32

Alloy Composition

Aluminum (Al), % 0.25 to 0.65
0
Carbon (C), % 0.050 to 0.1
0.36 to 0.42
Chromium (Cr), % 19 to 22
12.5 to 14.5
Cobalt (Co), % 0 to 0.5
0
Copper (Cu), % 0 to 0.5
0
Iron (Fe), % 39.4 to 50.5
83 to 87.1
Manganese (Mn), % 0 to 1.5
0 to 1.0
Nickel (Ni), % 30 to 34
0
Nitrogen (N), % 0 to 0.030
0
Phosphorus (P), % 0 to 0.015
0 to 0.040
Silicon (Si), % 0 to 0.7
0 to 1.0
Sulfur (S), % 0 to 0.010
0 to 0.015
Titanium (Ti), % 0.25 to 0.65
0