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EN 1.4640 Stainless Steel vs. EN 1.4558 Stainless Steel

Both EN 1.4640 stainless steel and EN 1.4558 stainless steel are iron alloys. They have 69% 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 1.4640 stainless steel and the bottom bar is EN 1.4558 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 51
39
Fatigue Strength, MPa 230 to 250
170
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
77
Shear Strength, MPa 440 to 460
350
Tensile Strength: Ultimate (UTS), MPa 620 to 650
510
Tensile Strength: Yield (Proof), MPa 240 to 260
200

Thermal Properties

Latent Heat of Fusion, J/g 280
300
Maximum Temperature: Corrosion, °C 420
480
Maximum Temperature: Mechanical, °C 930
1100
Melting Completion (Liquidus), °C 1420
1400
Melting Onset (Solidus), °C 1380
1350
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 15
12
Thermal Expansion, µm/m-K 16
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
1.9

Otherwise Unclassified Properties

Base Metal Price, % relative 14
31
Density, g/cm3 7.8
8.0
Embodied Carbon, kg CO2/kg material 2.8
5.5
Embodied Energy, MJ/kg 40
77
Embodied Water, L/kg 150
200

Common Calculations

PREN (Pitting Resistance) 20
22
Resilience: Ultimate (Unit Rupture Work), MJ/m3 250 to 260
160
Resilience: Unit (Modulus of Resilience), kJ/m3 150 to 170
100
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 22 to 23
18
Strength to Weight: Bending, points 21
18
Thermal Diffusivity, mm2/s 4.0
3.1
Thermal Shock Resistance, points 14 to 15
12

Alloy Composition

Aluminum (Al), % 0
0.15 to 0.45
Carbon (C), % 0.030 to 0.080
0 to 0.030
Chromium (Cr), % 18 to 19
20 to 23
Copper (Cu), % 1.3 to 2.0
0
Iron (Fe), % 67.4 to 73.6
39.2 to 47.9
Manganese (Mn), % 1.5 to 4.0
0 to 1.0
Nickel (Ni), % 5.5 to 6.9
32 to 35
Nitrogen (N), % 0.030 to 0.11
0
Phosphorus (P), % 0 to 0.045
0 to 0.020
Silicon (Si), % 0 to 0.5
0 to 0.7
Sulfur (S), % 0 to 0.015
0 to 0.015
Titanium (Ti), % 0
0 to 0.6