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EN 1.4003 Stainless Steel vs. EN 1.4618 Stainless Steel

Both EN 1.4003 stainless steel and EN 1.4618 stainless steel are iron alloys. They have 81% of their average alloy composition in common.

For each property being compared, the top bar is EN 1.4003 stainless steel and the bottom bar is EN 1.4618 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180
200 to 210
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 22
51
Fatigue Strength, MPa 210
240 to 250
Impact Strength: V-Notched Charpy, J 67
90 to 91
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
77
Shear Strength, MPa 340
480 to 500
Tensile Strength: Ultimate (UTS), MPa 540
680 to 700
Tensile Strength: Yield (Proof), MPa 320
250 to 260

Thermal Properties

Latent Heat of Fusion, J/g 270
280
Maximum Temperature: Corrosion, °C 390
410
Maximum Temperature: Mechanical, °C 720
900
Melting Completion (Liquidus), °C 1440
1400
Melting Onset (Solidus), °C 1400
1360
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 25
15
Thermal Expansion, µm/m-K 10
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 3.3
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 6.5
13
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 1.9
2.7
Embodied Energy, MJ/kg 27
39
Embodied Water, L/kg 97
150

Common Calculations

PREN (Pitting Resistance) 12
19
Resilience: Ultimate (Unit Rupture Work), MJ/m3 100
270 to 280
Resilience: Unit (Modulus of Resilience), kJ/m3 260
160 to 170
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 19
24 to 25
Strength to Weight: Bending, points 19
22 to 23
Thermal Diffusivity, mm2/s 6.7
4.0
Thermal Shock Resistance, points 19
15 to 16

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.1
Chromium (Cr), % 10.5 to 12.5
16.5 to 18.5
Copper (Cu), % 0
1.0 to 2.5
Iron (Fe), % 83.9 to 89.2
62.7 to 72.5
Manganese (Mn), % 0 to 1.5
5.5 to 9.5
Nickel (Ni), % 0.3 to 1.0
4.5 to 5.5
Nitrogen (N), % 0 to 0.030
0 to 0.15
Phosphorus (P), % 0 to 0.040
0 to 0.070
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.010