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EN 1.7703 Steel vs. EN 1.3955 Stainless Steel

Both EN 1.7703 steel and EN 1.3955 stainless steel are iron alloys. They have 73% 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 1.7703 steel and the bottom bar is EN 1.3955 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 20
23
Fatigue Strength, MPa 320 to 340
150
Impact Strength: V-Notched Charpy, J 46
90
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 74
77
Tensile Strength: Ultimate (UTS), MPa 670 to 690
520
Tensile Strength: Yield (Proof), MPa 460 to 500
220

Thermal Properties

Latent Heat of Fusion, J/g 250
290
Maximum Temperature: Mechanical, °C 460
930
Melting Completion (Liquidus), °C 1470
1430
Melting Onset (Solidus), °C 1430
1380
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 39
15
Thermal Expansion, µm/m-K 13
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.6
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 8.7
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 4.2
16
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 2.5
3.2
Embodied Energy, MJ/kg 35
45
Embodied Water, L/kg 61
140

Common Calculations

PREN (Pitting Resistance) 5.6
19
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120 to 130
95
Resilience: Unit (Modulus of Resilience), kJ/m3 570 to 650
130
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 24
18
Strength to Weight: Bending, points 22
18
Thermal Diffusivity, mm2/s 11
4.1
Thermal Shock Resistance, points 19 to 20
15

Alloy Composition

Carbon (C), % 0.11 to 0.15
0 to 0.15
Chromium (Cr), % 2.0 to 2.5
16.5 to 18.5
Copper (Cu), % 0 to 0.2
0
Iron (Fe), % 94.6 to 96.4
65.5 to 73.5
Manganese (Mn), % 0.3 to 0.6
0 to 2.0
Molybdenum (Mo), % 0.9 to 1.1
0 to 0.75
Nickel (Ni), % 0 to 0.25
10 to 12
Niobium (Nb), % 0 to 0.070
0
Nitrogen (N), % 0 to 0.012
0
Phosphorus (P), % 0 to 0.015
0 to 0.045
Silicon (Si), % 0 to 0.1
0 to 1.0
Sulfur (S), % 0 to 0.0050
0 to 0.030
Titanium (Ti), % 0 to 0.030
0
Vanadium (V), % 0.25 to 0.35
0