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AISI 204 Stainless Steel vs. EN 1.4509 Stainless Steel

Both AISI 204 stainless steel and EN 1.4509 stainless steel are iron alloys. They have a moderately high 90% of their average alloy composition in common.

For each property being compared, the top bar is AISI 204 stainless steel and the bottom bar is EN 1.4509 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210 to 330
180
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 23 to 39
21
Fatigue Strength, MPa 320 to 720
170
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
77
Shear Strength, MPa 500 to 700
330
Tensile Strength: Ultimate (UTS), MPa 730 to 1100
530
Tensile Strength: Yield (Proof), MPa 380 to 1080
260

Thermal Properties

Latent Heat of Fusion, J/g 280
280
Maximum Temperature: Corrosion, °C 410
570
Maximum Temperature: Mechanical, °C 850
890
Melting Completion (Liquidus), °C 1410
1440
Melting Onset (Solidus), °C 1370
1400
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 15
25
Thermal Expansion, µm/m-K 17
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 2.9
3.4

Otherwise Unclassified Properties

Base Metal Price, % relative 10
13
Density, g/cm3 7.7
7.7
Embodied Carbon, kg CO2/kg material 2.4
2.8
Embodied Energy, MJ/kg 35
41
Embodied Water, L/kg 130
120

Common Calculations

PREN (Pitting Resistance) 20
18
Resilience: Ultimate (Unit Rupture Work), MJ/m3 240 to 250
90
Resilience: Unit (Modulus of Resilience), kJ/m3 360 to 2940
180
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 27 to 40
19
Strength to Weight: Bending, points 24 to 31
19
Thermal Diffusivity, mm2/s 4.1
6.8
Thermal Shock Resistance, points 16 to 24
19

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.030
Chromium (Cr), % 15 to 17
17.5 to 18.5
Iron (Fe), % 69.6 to 76.4
77.8 to 82.1
Manganese (Mn), % 7.0 to 9.0
0 to 1.0
Nickel (Ni), % 1.5 to 3.0
0
Niobium (Nb), % 0
0.3 to 1.0
Nitrogen (N), % 0.15 to 0.3
0
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.015
Titanium (Ti), % 0
0.1 to 0.6