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EN 1.6579 Steel vs. EN 1.4125 Stainless Steel

Both EN 1.6579 steel and EN 1.4125 stainless steel are iron alloys. They have 83% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is EN 1.6579 steel and the bottom bar is EN 1.4125 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 260 to 290
250
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 11 to 14
19
Fatigue Strength, MPa 380 to 570
300
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
77
Tensile Strength: Ultimate (UTS), MPa 850 to 980
800
Tensile Strength: Yield (Proof), MPa 600 to 910
470

Thermal Properties

Latent Heat of Fusion, J/g 250
280
Maximum Temperature: Mechanical, °C 440
870
Melting Completion (Liquidus), °C 1460
1430
Melting Onset (Solidus), °C 1410
1390
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 39
15
Thermal Expansion, µm/m-K 13
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.7
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 8.8
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 3.7
9.0
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 1.7
2.3
Embodied Energy, MJ/kg 22
32
Embodied Water, L/kg 56
120

Common Calculations

PREN (Pitting Resistance) 2.4
19
Resilience: Ultimate (Unit Rupture Work), MJ/m3 100 to 120
130
Resilience: Unit (Modulus of Resilience), kJ/m3 950 to 2210
570
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 30 to 35
29
Strength to Weight: Bending, points 25 to 28
25
Thermal Diffusivity, mm2/s 11
4.1
Thermal Shock Resistance, points 25 to 29
29

Alloy Composition

Carbon (C), % 0.32 to 0.38
1.0 to 1.2
Chromium (Cr), % 1.4 to 1.7
16 to 18
Iron (Fe), % 94.2 to 96.1
78 to 82.7
Manganese (Mn), % 0.6 to 1.0
0 to 1.0
Molybdenum (Mo), % 0.15 to 0.35
0.4 to 0.8
Nickel (Ni), % 1.4 to 1.7
0
Phosphorus (P), % 0 to 0.025
0 to 0.040
Silicon (Si), % 0 to 0.6
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.015