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AISI 439 Stainless Steel vs. AISI 204 Stainless Steel

Both AISI 439 stainless steel and AISI 204 stainless steel are iron alloys. They have a moderately high 90% of their average alloy composition in common. There are 33 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is AISI 439 stainless steel and the bottom bar is AISI 204 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160
210 to 330
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 23
23 to 39
Fatigue Strength, MPa 170
320 to 720
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
77
Shear Strength, MPa 310
500 to 700
Tensile Strength: Ultimate (UTS), MPa 490
730 to 1100
Tensile Strength: Yield (Proof), MPa 250
380 to 1080

Thermal Properties

Latent Heat of Fusion, J/g 280
280
Maximum Temperature: Corrosion, °C 530
410
Maximum Temperature: Mechanical, °C 890
850
Melting Completion (Liquidus), °C 1510
1410
Melting Onset (Solidus), °C 1430
1370
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 25
15
Thermal Expansion, µm/m-K 11
17

Electrical Properties

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

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
10
Density, g/cm3 7.7
7.7
Embodied Carbon, kg CO2/kg material 2.3
2.4
Embodied Energy, MJ/kg 34
35
Embodied Water, L/kg 120
130

Common Calculations

PREN (Pitting Resistance) 18
20
Resilience: Ultimate (Unit Rupture Work), MJ/m3 95
240 to 250
Resilience: Unit (Modulus of Resilience), kJ/m3 160
360 to 2940
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 18
27 to 40
Strength to Weight: Bending, points 18
24 to 31
Thermal Diffusivity, mm2/s 6.7
4.1
Thermal Shock Resistance, points 16
16 to 24

Alloy Composition

Aluminum (Al), % 0 to 0.15
0
Carbon (C), % 0 to 0.030
0 to 0.030
Chromium (Cr), % 17 to 19
15 to 17
Iron (Fe), % 77.1 to 82.8
69.6 to 76.4
Manganese (Mn), % 0 to 1.0
7.0 to 9.0
Nickel (Ni), % 0 to 0.5
1.5 to 3.0
Nitrogen (N), % 0 to 0.030
0.15 to 0.3
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 0.030
Titanium (Ti), % 0.2 to 1.1
0