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EN 1.7725 Steel vs. EN 1.4301 Stainless Steel

Both EN 1.7725 steel and EN 1.4301 stainless steel are iron alloys. They have 73% of their average alloy composition in common. There are 32 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 1.4301 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 250 to 300
190 to 270
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 14
14 to 46
Fatigue Strength, MPa 390 to 550
200 to 330
Impact Strength: V-Notched Charpy, J 34 to 35
91 to 94
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
77
Tensile Strength: Ultimate (UTS), MPa 830 to 1000
610 to 900
Tensile Strength: Yield (Proof), MPa 610 to 860
220 to 570

Thermal Properties

Latent Heat of Fusion, J/g 250
290
Maximum Temperature: Mechanical, °C 440
940
Melting Completion (Liquidus), °C 1460
1430
Melting Onset (Solidus), °C 1420
1380
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 39
15
Thermal Expansion, µm/m-K 13
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 8.6
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 2.9
15
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.8
3.0
Embodied Energy, MJ/kg 24
43
Embodied Water, L/kg 54
140

Common Calculations

PREN (Pitting Resistance) 2.8
19
Resilience: Ultimate (Unit Rupture Work), MJ/m3 110 to 130
110 to 220
Resilience: Unit (Modulus of Resilience), kJ/m3 980 to 1940
120 to 820
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 29 to 35
22 to 32
Strength to Weight: Bending, points 25 to 28
20 to 27
Thermal Diffusivity, mm2/s 11
4.0
Thermal Shock Resistance, points 24 to 29
14 to 20

Alloy Composition

Carbon (C), % 0.27 to 0.34
0 to 0.070
Chromium (Cr), % 1.3 to 1.7
17.5 to 19.5
Iron (Fe), % 95.7 to 97.5
66.8 to 74.5
Manganese (Mn), % 0.6 to 1.0
0 to 2.0
Molybdenum (Mo), % 0.3 to 0.5
0
Nickel (Ni), % 0
8.0 to 10.5
Nitrogen (N), % 0
0 to 0.1
Phosphorus (P), % 0 to 0.025
0 to 0.045
Silicon (Si), % 0 to 0.6
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.015
Vanadium (V), % 0.050 to 0.15
0

Comparable Variants