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AISI 204 Stainless Steel vs. ACI-ASTM CH20 Steel

Both AISI 204 stainless steel and ACI-ASTM CH20 steel are iron alloys. They have 80% of their average alloy composition in common. There are 32 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 ACI-ASTM CH20 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210 to 330
190
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 23 to 39
38
Fatigue Strength, MPa 320 to 720
290
Poisson's Ratio 0.28
0.27
Shear Modulus, GPa 77
78
Tensile Strength: Ultimate (UTS), MPa 730 to 1100
610
Tensile Strength: Yield (Proof), MPa 380 to 1080
350

Thermal Properties

Latent Heat of Fusion, J/g 280
310
Maximum Temperature: Corrosion, °C 410
440
Maximum Temperature: Mechanical, °C 850
1100
Melting Completion (Liquidus), °C 1410
1410
Melting Onset (Solidus), °C 1370
1430
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 15
14
Thermal Expansion, µm/m-K 17
15

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.9
2.3

Otherwise Unclassified Properties

Base Metal Price, % relative 10
20
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.4
3.7
Embodied Energy, MJ/kg 35
53
Embodied Water, L/kg 130
180

Common Calculations

PREN (Pitting Resistance) 20
25
Resilience: Ultimate (Unit Rupture Work), MJ/m3 240 to 250
200
Resilience: Unit (Modulus of Resilience), kJ/m3 360 to 2940
300
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 27 to 40
22
Strength to Weight: Bending, points 24 to 31
21
Thermal Diffusivity, mm2/s 4.1
3.7
Thermal Shock Resistance, points 16 to 24
15

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.2
Chromium (Cr), % 15 to 17
22 to 26
Iron (Fe), % 69.6 to 76.4
54.7 to 66
Manganese (Mn), % 7.0 to 9.0
0 to 1.5
Molybdenum (Mo), % 0
0 to 0.5
Nickel (Ni), % 1.5 to 3.0
12 to 15
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 2.0
Sulfur (S), % 0 to 0.030
0 to 0.040