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ACI-ASTM CK20 Steel vs. ASTM A203 Steel

Both ACI-ASTM CK20 steel and ASTM A203 steel are iron alloys. There are 30 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 ACI-ASTM CK20 steel and the bottom bar is ASTM A203 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150
160 to 180
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 37
22 to 26
Fatigue Strength, MPa 220
210 to 280
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 78
73
Tensile Strength: Ultimate (UTS), MPa 530
520 to 590
Tensile Strength: Yield (Proof), MPa 260
290 to 390

Thermal Properties

Latent Heat of Fusion, J/g 310
250
Maximum Temperature: Mechanical, °C 1100
410
Melting Completion (Liquidus), °C 1400
1460
Melting Onset (Solidus), °C 1430
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 14
52
Thermal Expansion, µm/m-K 15
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
7.4 to 7.6
Electrical Conductivity: Equal Weight (Specific), % IACS 2.3
8.5 to 8.7

Otherwise Unclassified Properties

Base Metal Price, % relative 25
3.2 to 4.0
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 4.4
1.6 to 1.7
Embodied Energy, MJ/kg 62
21 to 23
Embodied Water, L/kg 190
50 to 52

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 160
110 to 120
Resilience: Unit (Modulus of Resilience), kJ/m3 170
230 to 410
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 19
18 to 21
Strength to Weight: Bending, points 19
18 to 20
Thermal Diffusivity, mm2/s 3.7
14
Thermal Shock Resistance, points 13
15 to 17