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EN 1.4317 Stainless Steel vs. EN 1.7703 Steel

Both EN 1.4317 stainless steel and EN 1.7703 steel are iron alloys. They have 85% 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 1.4317 stainless steel and the bottom bar is EN 1.7703 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 17
20
Fatigue Strength, MPa 380
320 to 340
Impact Strength: V-Notched Charpy, J 56
46
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
74
Tensile Strength: Ultimate (UTS), MPa 860
670 to 690
Tensile Strength: Yield (Proof), MPa 630
460 to 500

Thermal Properties

Latent Heat of Fusion, J/g 280
250
Maximum Temperature: Mechanical, °C 770
460
Melting Completion (Liquidus), °C 1440
1470
Melting Onset (Solidus), °C 1400
1430
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 26
39
Thermal Expansion, µm/m-K 11
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.7
7.6
Electrical Conductivity: Equal Weight (Specific), % IACS 3.2
8.7

Otherwise Unclassified Properties

Base Metal Price, % relative 10
4.2
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 2.4
2.5
Embodied Energy, MJ/kg 33
35
Embodied Water, L/kg 110
61

Common Calculations

PREN (Pitting Resistance) 14
5.6
Resilience: Ultimate (Unit Rupture Work), MJ/m3 130
120 to 130
Resilience: Unit (Modulus of Resilience), kJ/m3 1010
570 to 650
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 31
24
Strength to Weight: Bending, points 26
22
Thermal Diffusivity, mm2/s 7.0
11
Thermal Shock Resistance, points 30
19 to 20

Alloy Composition

Carbon (C), % 0 to 0.060
0.11 to 0.15
Chromium (Cr), % 12 to 13.5
2.0 to 2.5
Copper (Cu), % 0
0 to 0.2
Iron (Fe), % 78.7 to 84.5
94.6 to 96.4
Manganese (Mn), % 0 to 1.0
0.3 to 0.6
Molybdenum (Mo), % 0 to 0.7
0.9 to 1.1
Nickel (Ni), % 3.5 to 5.0
0 to 0.25
Niobium (Nb), % 0
0 to 0.070
Nitrogen (N), % 0
0 to 0.012
Phosphorus (P), % 0 to 0.035
0 to 0.015
Silicon (Si), % 0 to 1.0
0 to 0.1
Sulfur (S), % 0 to 0.025
0 to 0.0050
Titanium (Ti), % 0
0 to 0.030
Vanadium (V), % 0
0.25 to 0.35