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EN 1.7767 Steel vs. AISI 418 Stainless Steel

Both EN 1.7767 steel and AISI 418 stainless steel are iron alloys. They have 85% of their average alloy composition in common. There are 32 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 1.7767 steel and the bottom bar is AISI 418 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200 to 210
330
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 20
17
Fatigue Strength, MPa 320 to 340
520
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 74
77
Shear Strength, MPa 420 to 430
680
Tensile Strength: Ultimate (UTS), MPa 670 to 690
1100
Tensile Strength: Yield (Proof), MPa 460 to 500
850

Thermal Properties

Latent Heat of Fusion, J/g 250
270
Maximum Temperature: Mechanical, °C 480
770
Melting Completion (Liquidus), °C 1470
1500
Melting Onset (Solidus), °C 1430
1460
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 40
25
Thermal Expansion, µm/m-K 13
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.7
2.8
Electrical Conductivity: Equal Weight (Specific), % IACS 8.9
3.1

Otherwise Unclassified Properties

Base Metal Price, % relative 4.5
15
Density, g/cm3 7.9
8.0
Embodied Carbon, kg CO2/kg material 2.4
2.9
Embodied Energy, MJ/kg 33
41
Embodied Water, L/kg 64
110

Common Calculations

PREN (Pitting Resistance) 6.4
19
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120 to 130
170
Resilience: Unit (Modulus of Resilience), kJ/m3 570 to 650
1830
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 24
38
Strength to Weight: Bending, points 22
29
Thermal Diffusivity, mm2/s 11
6.7
Thermal Shock Resistance, points 19 to 20
40

Alloy Composition

Carbon (C), % 0.1 to 0.15
0.15 to 0.2
Chromium (Cr), % 2.8 to 3.3
12 to 14
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 93.8 to 95.8
78.5 to 83.6
Manganese (Mn), % 0.3 to 0.6
0 to 0.5
Molybdenum (Mo), % 0.9 to 1.1
0 to 0.5
Nickel (Ni), % 0 to 0.25
1.8 to 2.2
Niobium (Nb), % 0 to 0.070
0
Nitrogen (N), % 0 to 0.012
0
Phosphorus (P), % 0 to 0.015
0 to 0.040
Silicon (Si), % 0 to 0.15
0 to 0.5
Sulfur (S), % 0 to 0.0050
0 to 0.030
Titanium (Ti), % 0 to 0.030
0
Tungsten (W), % 0
2.5 to 3.5
Vanadium (V), % 0.2 to 0.3
0