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EN 1.4658 Stainless Steel vs. EN 1.6579 Steel

Both EN 1.4658 stainless steel and EN 1.6579 steel are iron alloys. They have 62% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is EN 1.4658 stainless steel and the bottom bar is EN 1.6579 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 260
260 to 290
Elastic (Young's, Tensile) Modulus, GPa 210
190
Elongation at Break, % 28
11 to 14
Fatigue Strength, MPa 530
380 to 570
Impact Strength: V-Notched Charpy, J 110
35 to 41
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 81
73
Tensile Strength: Ultimate (UTS), MPa 900
850 to 980
Tensile Strength: Yield (Proof), MPa 730
600 to 910

Thermal Properties

Latent Heat of Fusion, J/g 300
250
Maximum Temperature: Mechanical, °C 1100
440
Melting Completion (Liquidus), °C 1450
1460
Melting Onset (Solidus), °C 1400
1410
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 16
39
Thermal Expansion, µm/m-K 13
13

Otherwise Unclassified Properties

Base Metal Price, % relative 25
3.7
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 4.5
1.7
Embodied Energy, MJ/kg 61
22
Embodied Water, L/kg 200
56

Common Calculations

PREN (Pitting Resistance) 49
2.4
Resilience: Ultimate (Unit Rupture Work), MJ/m3 240
100 to 120
Resilience: Unit (Modulus of Resilience), kJ/m3 1280
950 to 2210
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 32
30 to 35
Strength to Weight: Bending, points 26
25 to 28
Thermal Diffusivity, mm2/s 4.3
11
Thermal Shock Resistance, points 24
25 to 29

Alloy Composition

Carbon (C), % 0 to 0.030
0.32 to 0.38
Chromium (Cr), % 26 to 29
1.4 to 1.7
Cobalt (Co), % 0.5 to 2.0
0
Copper (Cu), % 0 to 1.0
0
Iron (Fe), % 50.9 to 63.7
94.2 to 96.1
Manganese (Mn), % 0 to 1.5
0.6 to 1.0
Molybdenum (Mo), % 4.0 to 5.0
0.15 to 0.35
Nickel (Ni), % 5.5 to 9.5
1.4 to 1.7
Nitrogen (N), % 0.3 to 0.5
0
Phosphorus (P), % 0 to 0.035
0 to 0.025
Silicon (Si), % 0 to 0.5
0 to 0.6
Sulfur (S), % 0 to 0.010
0 to 0.030