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EN 1.7725 Steel vs. EN 1.4901 Stainless Steel

Both EN 1.7725 steel and EN 1.4901 stainless steel are iron alloys. They have a moderately high 90% 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 1.7725 steel and the bottom bar is EN 1.4901 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 14
19
Fatigue Strength, MPa 390 to 550
310
Impact Strength: V-Notched Charpy, J 34 to 35
38
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
76
Tensile Strength: Ultimate (UTS), MPa 830 to 1000
740
Tensile Strength: Yield (Proof), MPa 610 to 860
490

Thermal Properties

Latent Heat of Fusion, J/g 250
260
Maximum Temperature: Mechanical, °C 440
650
Melting Completion (Liquidus), °C 1460
1490
Melting Onset (Solidus), °C 1420
1450
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 39
26
Thermal Expansion, µm/m-K 13
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
8.2
Electrical Conductivity: Equal Weight (Specific), % IACS 8.6
9.3

Otherwise Unclassified Properties

Base Metal Price, % relative 2.9
11
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 1.8
2.8
Embodied Energy, MJ/kg 24
40
Embodied Water, L/kg 54
89

Common Calculations

PREN (Pitting Resistance) 2.8
14
Resilience: Ultimate (Unit Rupture Work), MJ/m3 110 to 130
120
Resilience: Unit (Modulus of Resilience), kJ/m3 980 to 1940
620
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 29 to 35
26
Strength to Weight: Bending, points 25 to 28
23
Thermal Diffusivity, mm2/s 11
6.9
Thermal Shock Resistance, points 24 to 29
23

Alloy Composition

Aluminum (Al), % 0
0 to 0.020
Boron (B), % 0
0.0010 to 0.0060
Carbon (C), % 0.27 to 0.34
0.070 to 0.13
Chromium (Cr), % 1.3 to 1.7
8.5 to 9.5
Iron (Fe), % 95.7 to 97.5
85.8 to 89.1
Manganese (Mn), % 0.6 to 1.0
0.3 to 0.6
Molybdenum (Mo), % 0.3 to 0.5
0.3 to 0.6
Nickel (Ni), % 0
0 to 0.4
Niobium (Nb), % 0
0.040 to 0.090
Nitrogen (N), % 0
0.030 to 0.070
Phosphorus (P), % 0 to 0.025
0 to 0.020
Silicon (Si), % 0 to 0.6
0 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.010
Titanium (Ti), % 0
0 to 0.010
Tungsten (W), % 0
1.5 to 2.0
Vanadium (V), % 0.050 to 0.15
0.15 to 0.25
Zirconium (Zr), % 0
0 to 0.010