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EN 1.4305 Stainless Steel vs. EN 1.4818 Stainless Steel

Both EN 1.4305 stainless steel and EN 1.4818 stainless steel are iron alloys. They have a very high 97% of their average alloy composition in common.

For each property being compared, the top bar is EN 1.4305 stainless steel and the bottom bar is EN 1.4818 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200 to 270
180
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 14 to 40
40
Fatigue Strength, MPa 190 to 330
280
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
77
Shear Strength, MPa 420 to 550
480
Tensile Strength: Ultimate (UTS), MPa 610 to 900
700
Tensile Strength: Yield (Proof), MPa 220 to 570
330

Thermal Properties

Latent Heat of Fusion, J/g 290
300
Maximum Temperature: Corrosion, °C 410
420
Maximum Temperature: Mechanical, °C 930
1050
Melting Completion (Liquidus), °C 1420
1410
Melting Onset (Solidus), °C 1380
1370
Specific Heat Capacity, J/kg-K 480
490
Thermal Conductivity, W/m-K 15
17
Thermal Expansion, µm/m-K 16
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
2.4

Otherwise Unclassified Properties

Base Metal Price, % relative 15
16
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 3.0
3.1
Embodied Energy, MJ/kg 42
44
Embodied Water, L/kg 140
150

Common Calculations

PREN (Pitting Resistance) 19
22
Resilience: Ultimate (Unit Rupture Work), MJ/m3 110 to 190
230
Resilience: Unit (Modulus of Resilience), kJ/m3 120 to 830
270
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 22 to 32
25
Strength to Weight: Bending, points 20 to 27
23
Thermal Diffusivity, mm2/s 4.0
4.5
Thermal Shock Resistance, points 14 to 20
15

Alloy Composition

Carbon (C), % 0 to 0.1
0.040 to 0.080
Cerium (Ce), % 0
0.030 to 0.080
Chromium (Cr), % 17 to 19
18 to 20
Copper (Cu), % 0 to 1.0
0
Iron (Fe), % 66.4 to 74.9
65.6 to 71.8
Manganese (Mn), % 0 to 2.0
0 to 1.0
Nickel (Ni), % 8.0 to 10
9.0 to 11
Nitrogen (N), % 0 to 0.1
0.12 to 0.2
Phosphorus (P), % 0 to 0.045
0 to 0.045
Silicon (Si), % 0 to 1.0
1.0 to 2.0
Sulfur (S), % 0.15 to 0.35
0 to 0.015