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AISI 204 Stainless Steel vs. AISI 420 Stainless Steel

Both AISI 204 stainless steel and AISI 420 stainless steel are iron alloys. They have 87% of their average alloy composition in common. There are 33 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is AISI 204 stainless steel and the bottom bar is AISI 420 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210 to 330
190
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 23 to 39
8.0 to 15
Fatigue Strength, MPa 320 to 720
220 to 670
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
76
Shear Strength, MPa 500 to 700
420 to 1010
Tensile Strength: Ultimate (UTS), MPa 730 to 1100
690 to 1720
Tensile Strength: Yield (Proof), MPa 380 to 1080
380 to 1310

Thermal Properties

Latent Heat of Fusion, J/g 280
280
Maximum Temperature: Corrosion, °C 410
390
Maximum Temperature: Mechanical, °C 850
620
Melting Completion (Liquidus), °C 1410
1510
Melting Onset (Solidus), °C 1370
1450
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 15
27
Thermal Expansion, µm/m-K 17
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
3.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.9
3.5

Otherwise Unclassified Properties

Base Metal Price, % relative 10
7.5
Density, g/cm3 7.7
7.7
Embodied Carbon, kg CO2/kg material 2.4
2.0
Embodied Energy, MJ/kg 35
28
Embodied Water, L/kg 130
100

Common Calculations

PREN (Pitting Resistance) 20
14
Resilience: Ultimate (Unit Rupture Work), MJ/m3 240 to 250
88 to 130
Resilience: Unit (Modulus of Resilience), kJ/m3 360 to 2940
380 to 4410
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 27 to 40
25 to 62
Strength to Weight: Bending, points 24 to 31
22 to 41
Thermal Diffusivity, mm2/s 4.1
7.3
Thermal Shock Resistance, points 16 to 24
25 to 62

Alloy Composition

Carbon (C), % 0 to 0.030
0.15 to 0.4
Chromium (Cr), % 15 to 17
12 to 14
Iron (Fe), % 69.6 to 76.4
82.3 to 87.9
Manganese (Mn), % 7.0 to 9.0
0 to 1.0
Molybdenum (Mo), % 0
0 to 0.5
Nickel (Ni), % 1.5 to 3.0
0 to 0.75
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 0.030

Comparable Variants