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EN 1.7725 Steel vs. EN 1.4417 Stainless Steel

Both EN 1.7725 steel and EN 1.4417 stainless steel are iron alloys. They have 65% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (2, 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 1.4417 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 14
25
Fatigue Strength, MPa 390 to 550
380
Impact Strength: V-Notched Charpy, J 34 to 35
56
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 73
81
Tensile Strength: Ultimate (UTS), MPa 830 to 1000
730
Tensile Strength: Yield (Proof), MPa 610 to 860
550

Thermal Properties

Latent Heat of Fusion, J/g 250
300
Maximum Temperature: Mechanical, °C 440
1100
Melting Completion (Liquidus), °C 1460
1450
Melting Onset (Solidus), °C 1420
1410
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 39
17
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 8.6
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 2.9
21
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 1.8
4.1
Embodied Energy, MJ/kg 24
57
Embodied Water, L/kg 54
180

Common Calculations

PREN (Pitting Resistance) 2.8
41
Resilience: Ultimate (Unit Rupture Work), MJ/m3 110 to 130
170
Resilience: Unit (Modulus of Resilience), kJ/m3 980 to 1940
730
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 29 to 35
26
Strength to Weight: Bending, points 25 to 28
23
Thermal Diffusivity, mm2/s 11
4.6
Thermal Shock Resistance, points 24 to 29
20

Alloy Composition

Carbon (C), % 0.27 to 0.34
0 to 0.030
Chromium (Cr), % 1.3 to 1.7
24 to 26
Copper (Cu), % 0
0 to 1.0
Iron (Fe), % 95.7 to 97.5
56.7 to 66.9
Manganese (Mn), % 0.6 to 1.0
0 to 1.5
Molybdenum (Mo), % 0.3 to 0.5
3.0 to 4.0
Nickel (Ni), % 0
6.0 to 8.5
Nitrogen (N), % 0
0.15 to 0.25
Phosphorus (P), % 0 to 0.025
0 to 0.030
Silicon (Si), % 0 to 0.6
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.020
Tungsten (W), % 0
0 to 1.0
Vanadium (V), % 0.050 to 0.15
0