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EN 1.4458 Stainless Steel vs. EN 1.7706 Steel

Both EN 1.4458 stainless steel and EN 1.7706 steel are iron alloys. They have 50% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is EN 1.4458 stainless steel and the bottom bar is EN 1.7706 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150
210
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 34
17
Fatigue Strength, MPa 150
330
Impact Strength: V-Notched Charpy, J 67
30
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 78
73
Tensile Strength: Ultimate (UTS), MPa 510
690
Tensile Strength: Yield (Proof), MPa 190
500

Thermal Properties

Latent Heat of Fusion, J/g 300
260
Maximum Temperature: Mechanical, °C 1100
440
Melting Completion (Liquidus), °C 1420
1470
Melting Onset (Solidus), °C 1370
1430
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 16
40
Thermal Expansion, µm/m-K 15
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.7
7.6
Electrical Conductivity: Equal Weight (Specific), % IACS 1.9
8.7

Otherwise Unclassified Properties

Base Metal Price, % relative 30
3.7
Density, g/cm3 8.0
7.9
Embodied Carbon, kg CO2/kg material 5.4
2.3
Embodied Energy, MJ/kg 75
32
Embodied Water, L/kg 200
57

Common Calculations

PREN (Pitting Resistance) 30
4.7
Resilience: Ultimate (Unit Rupture Work), MJ/m3 140
110
Resilience: Unit (Modulus of Resilience), kJ/m3 89
670
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 17
24
Strength to Weight: Bending, points 18
22
Thermal Diffusivity, mm2/s 4.2
11
Thermal Shock Resistance, points 12
20

Alloy Composition

Carbon (C), % 0 to 0.030
0.15 to 0.2
Chromium (Cr), % 19 to 22
1.2 to 1.5
Copper (Cu), % 0 to 2.0
0 to 0.3
Iron (Fe), % 40.2 to 53
94.7 to 97.1
Manganese (Mn), % 0 to 2.0
0.5 to 0.9
Molybdenum (Mo), % 2.0 to 2.5
0.9 to 1.1
Nickel (Ni), % 26 to 30
0 to 0.4
Nitrogen (N), % 0 to 0.2
0
Phosphorus (P), % 0 to 0.035
0 to 0.020
Silicon (Si), % 0 to 1.0
0 to 0.6
Sulfur (S), % 0 to 0.025
0 to 0.015
Vanadium (V), % 0
0.2 to 0.3