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EN 1.4031 Stainless Steel vs. EN 1.4640 Stainless Steel

Both EN 1.4031 stainless steel and EN 1.4640 stainless steel are iron alloys. They have 85% of their average alloy composition in common. There are 32 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 1.4031 stainless steel and the bottom bar is EN 1.4640 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 11 to 13
51
Fatigue Strength, MPa 220 to 400
230 to 250
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
77
Shear Strength, MPa 400 to 540
440 to 460
Tensile Strength: Ultimate (UTS), MPa 670 to 900
620 to 650
Tensile Strength: Yield (Proof), MPa 390 to 730
240 to 260

Thermal Properties

Latent Heat of Fusion, J/g 280
280
Maximum Temperature: Corrosion, °C 390
420
Maximum Temperature: Mechanical, °C 770
930
Melting Completion (Liquidus), °C 1440
1420
Melting Onset (Solidus), °C 1400
1380
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 30
15
Thermal Expansion, µm/m-K 11
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.1
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 3.7
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 7.0
14
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 1.9
2.8
Embodied Energy, MJ/kg 27
40
Embodied Water, L/kg 100
150

Common Calculations

PREN (Pitting Resistance) 14
20
Resilience: Ultimate (Unit Rupture Work), MJ/m3 77 to 94
250 to 260
Resilience: Unit (Modulus of Resilience), kJ/m3 380 to 1360
150 to 170
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 24 to 32
22 to 23
Strength to Weight: Bending, points 22 to 27
21
Thermal Diffusivity, mm2/s 8.1
4.0
Thermal Shock Resistance, points 23 to 32
14 to 15

Alloy Composition

Carbon (C), % 0.36 to 0.42
0.030 to 0.080
Chromium (Cr), % 12.5 to 14.5
18 to 19
Copper (Cu), % 0
1.3 to 2.0
Iron (Fe), % 83 to 87.1
67.4 to 73.6
Manganese (Mn), % 0 to 1.0
1.5 to 4.0
Nickel (Ni), % 0
5.5 to 6.9
Nitrogen (N), % 0
0.030 to 0.11
Phosphorus (P), % 0 to 0.040
0 to 0.045
Silicon (Si), % 0 to 1.0
0 to 0.5
Sulfur (S), % 0 to 0.015
0 to 0.015