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EN 1.4618 Stainless Steel vs. EN 1.4912 Stainless Steel

Both EN 1.4618 stainless steel and EN 1.4912 stainless steel are iron alloys. They have a moderately high 92% of their average alloy composition in common.

For each property being compared, the top bar is EN 1.4618 stainless steel and the bottom bar is EN 1.4912 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200 to 210
180
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 51
40
Fatigue Strength, MPa 240 to 250
200
Impact Strength: V-Notched Charpy, J 90 to 91
90
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
77
Shear Strength, MPa 480 to 500
420
Tensile Strength: Ultimate (UTS), MPa 680 to 700
610
Tensile Strength: Yield (Proof), MPa 250 to 260
230

Thermal Properties

Latent Heat of Fusion, J/g 280
290
Maximum Temperature: Corrosion, °C 410
520
Maximum Temperature: Mechanical, °C 900
940
Melting Completion (Liquidus), °C 1400
1430
Melting Onset (Solidus), °C 1360
1390
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 15
16
Thermal Expansion, µm/m-K 16
16

Electrical Properties

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

Otherwise Unclassified Properties

Base Metal Price, % relative 13
20
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.7
3.8
Embodied Energy, MJ/kg 39
55
Embodied Water, L/kg 150
140

Common Calculations

PREN (Pitting Resistance) 19
18
Resilience: Ultimate (Unit Rupture Work), MJ/m3 270 to 280
190
Resilience: Unit (Modulus of Resilience), kJ/m3 160 to 170
130
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 24 to 25
22
Strength to Weight: Bending, points 22 to 23
20
Thermal Diffusivity, mm2/s 4.0
4.2
Thermal Shock Resistance, points 15 to 16
14

Alloy Composition

Carbon (C), % 0 to 0.1
0.040 to 0.1
Chromium (Cr), % 16.5 to 18.5
17 to 19
Copper (Cu), % 1.0 to 2.5
0
Iron (Fe), % 62.7 to 72.5
64.6 to 73.6
Manganese (Mn), % 5.5 to 9.5
0 to 2.0
Nickel (Ni), % 4.5 to 5.5
9.0 to 12
Niobium (Nb), % 0
0.4 to 1.2
Nitrogen (N), % 0 to 0.15
0
Phosphorus (P), % 0 to 0.070
0 to 0.045
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.010
0 to 0.015