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EN 1.4318 Stainless Steel vs. EN 1.7703 Steel

Both EN 1.4318 stainless steel and EN 1.7703 steel are iron alloys. They have 77% of their average alloy composition in common. There are 33 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 1.4318 stainless steel and the bottom bar is EN 1.7703 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 230
200 to 210
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 44
20
Fatigue Strength, MPa 340
320 to 340
Impact Strength: V-Notched Charpy, J 85
46
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
74
Shear Strength, MPa 520
420 to 430
Tensile Strength: Ultimate (UTS), MPa 740
670 to 690
Tensile Strength: Yield (Proof), MPa 380
460 to 500

Thermal Properties

Latent Heat of Fusion, J/g 290
250
Maximum Temperature: Mechanical, °C 910
460
Melting Completion (Liquidus), °C 1430
1470
Melting Onset (Solidus), °C 1380
1430
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 15
39
Thermal Expansion, µm/m-K 16
13

Electrical Properties

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

Otherwise Unclassified Properties

Base Metal Price, % relative 13
4.2
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 2.8
2.5
Embodied Energy, MJ/kg 39
35
Embodied Water, L/kg 130
61

Common Calculations

PREN (Pitting Resistance) 20
5.6
Resilience: Ultimate (Unit Rupture Work), MJ/m3 280
120 to 130
Resilience: Unit (Modulus of Resilience), kJ/m3 360
570 to 650
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 27
24
Strength to Weight: Bending, points 23
22
Thermal Diffusivity, mm2/s 4.0
11
Thermal Shock Resistance, points 17
19 to 20

Alloy Composition

Carbon (C), % 0 to 0.030
0.11 to 0.15
Chromium (Cr), % 16.5 to 18.5
2.0 to 2.5
Copper (Cu), % 0
0 to 0.2
Iron (Fe), % 70.2 to 77.4
94.6 to 96.4
Manganese (Mn), % 0 to 2.0
0.3 to 0.6
Molybdenum (Mo), % 0
0.9 to 1.1
Nickel (Ni), % 6.0 to 8.0
0 to 0.25
Niobium (Nb), % 0
0 to 0.070
Nitrogen (N), % 0.1 to 0.2
0 to 0.012
Phosphorus (P), % 0 to 0.045
0 to 0.015
Silicon (Si), % 0 to 1.0
0 to 0.1
Sulfur (S), % 0 to 0.015
0 to 0.0050
Titanium (Ti), % 0
0 to 0.030
Vanadium (V), % 0
0.25 to 0.35