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EN 1.7725 Steel vs. EN 1.4558 Stainless Steel

Both EN 1.7725 steel and EN 1.4558 stainless steel are iron alloys. They have 46% 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 1.7725 steel and the bottom bar is EN 1.4558 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 14
39
Fatigue Strength, MPa 390 to 550
170
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
77
Tensile Strength: Ultimate (UTS), MPa 830 to 1000
510
Tensile Strength: Yield (Proof), MPa 610 to 860
200

Thermal Properties

Latent Heat of Fusion, J/g 250
300
Maximum Temperature: Mechanical, °C 440
1100
Melting Completion (Liquidus), °C 1460
1400
Melting Onset (Solidus), °C 1420
1350
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 39
12
Thermal Expansion, µm/m-K 13
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 8.6
1.9

Otherwise Unclassified Properties

Base Metal Price, % relative 2.9
31
Density, g/cm3 7.8
8.0
Embodied Carbon, kg CO2/kg material 1.8
5.5
Embodied Energy, MJ/kg 24
77
Embodied Water, L/kg 54
200

Common Calculations

PREN (Pitting Resistance) 2.8
22
Resilience: Ultimate (Unit Rupture Work), MJ/m3 110 to 130
160
Resilience: Unit (Modulus of Resilience), kJ/m3 980 to 1940
100
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 29 to 35
18
Strength to Weight: Bending, points 25 to 28
18
Thermal Diffusivity, mm2/s 11
3.1
Thermal Shock Resistance, points 24 to 29
12

Alloy Composition

Aluminum (Al), % 0
0.15 to 0.45
Carbon (C), % 0.27 to 0.34
0 to 0.030
Chromium (Cr), % 1.3 to 1.7
20 to 23
Iron (Fe), % 95.7 to 97.5
39.2 to 47.9
Manganese (Mn), % 0.6 to 1.0
0 to 1.0
Molybdenum (Mo), % 0.3 to 0.5
0
Nickel (Ni), % 0
32 to 35
Phosphorus (P), % 0 to 0.025
0 to 0.020
Silicon (Si), % 0 to 0.6
0 to 0.7
Sulfur (S), % 0 to 0.030
0 to 0.015
Titanium (Ti), % 0
0 to 0.6
Vanadium (V), % 0.050 to 0.15
0