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EN 1.7725 Steel vs. EN 1.4347 Stainless Steel

Both EN 1.7725 steel and EN 1.4347 stainless steel are iron alloys. They have 68% 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 1.4347 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 14
23
Fatigue Strength, MPa 390 to 550
320
Impact Strength: V-Notched Charpy, J 34 to 35
34
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 73
79
Tensile Strength: Ultimate (UTS), MPa 830 to 1000
660
Tensile Strength: Yield (Proof), MPa 610 to 860
480

Thermal Properties

Latent Heat of Fusion, J/g 250
300
Maximum Temperature: Mechanical, °C 440
1100
Melting Completion (Liquidus), °C 1460
1410
Melting Onset (Solidus), °C 1420
1370
Specific Heat Capacity, J/kg-K 470
490
Thermal Conductivity, W/m-K 39
15
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
2.1
Electrical Conductivity: Equal Weight (Specific), % IACS 8.6
2.4

Otherwise Unclassified Properties

Base Metal Price, % relative 2.9
16
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 1.8
3.1
Embodied Energy, MJ/kg 24
44
Embodied Water, L/kg 54
170

Common Calculations

PREN (Pitting Resistance) 2.8
28
Resilience: Ultimate (Unit Rupture Work), MJ/m3 110 to 130
140
Resilience: Unit (Modulus of Resilience), kJ/m3 980 to 1940
570
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 29 to 35
24
Strength to Weight: Bending, points 25 to 28
22
Thermal Diffusivity, mm2/s 11
4.0
Thermal Shock Resistance, points 24 to 29
19

Alloy Composition

Carbon (C), % 0.27 to 0.34
0 to 0.050
Chromium (Cr), % 1.3 to 1.7
25 to 27
Iron (Fe), % 95.7 to 97.5
62.2 to 69.4
Manganese (Mn), % 0.6 to 1.0
0 to 1.5
Molybdenum (Mo), % 0.3 to 0.5
0
Nickel (Ni), % 0
5.5 to 7.5
Nitrogen (N), % 0
0.1 to 0.2
Phosphorus (P), % 0 to 0.025
0 to 0.035
Silicon (Si), % 0 to 0.6
0 to 1.5
Sulfur (S), % 0 to 0.030
0 to 0.020
Vanadium (V), % 0.050 to 0.15
0