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EN 1.4646 Stainless Steel vs. EN 1.4618 Stainless Steel

Both EN 1.4646 stainless steel and EN 1.4618 stainless steel are iron alloys. They have a moderately high 95% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is EN 1.4646 stainless steel and the bottom bar is EN 1.4618 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 220
200 to 210
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 34
51
Fatigue Strength, MPa 340
240 to 250
Impact Strength: V-Notched Charpy, J 90
90 to 91
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
77
Shear Strength, MPa 500
480 to 500
Tensile Strength: Ultimate (UTS), MPa 750
680 to 700
Tensile Strength: Yield (Proof), MPa 430
250 to 260

Thermal Properties

Latent Heat of Fusion, J/g 290
280
Maximum Temperature: Corrosion, °C 410
410
Maximum Temperature: Mechanical, °C 910
900
Melting Completion (Liquidus), °C 1390
1400
Melting Onset (Solidus), °C 1340
1360
Specific Heat Capacity, J/kg-K 480
480
Thermal Expansion, µm/m-K 17
16

Otherwise Unclassified Properties

Base Metal Price, % relative 13
13
Density, g/cm3 7.7
7.7
Embodied Carbon, kg CO2/kg material 2.8
2.7
Embodied Energy, MJ/kg 41
39
Embodied Water, L/kg 160
150

Common Calculations

PREN (Pitting Resistance) 23
19
Resilience: Ultimate (Unit Rupture Work), MJ/m3 220
270 to 280
Resilience: Unit (Modulus of Resilience), kJ/m3 460
160 to 170
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 27
24 to 25
Strength to Weight: Bending, points 24
22 to 23
Thermal Shock Resistance, points 16
15 to 16

Alloy Composition

Carbon (C), % 0.020 to 0.1
0 to 0.1
Chromium (Cr), % 17 to 19
16.5 to 18.5
Copper (Cu), % 1.5 to 3.0
1.0 to 2.5
Iron (Fe), % 59 to 67.3
62.7 to 72.5
Manganese (Mn), % 10.5 to 12.5
5.5 to 9.5
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 3.5 to 4.5
4.5 to 5.5
Nitrogen (N), % 0.2 to 0.3
0 to 0.15
Phosphorus (P), % 0 to 0.050
0 to 0.070
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.010