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Gray Cast Iron, ASTM A 48 Class 40
Categories: Metal; Ferrous Metal; Cast Iron; Gray Cast Iron
Material Notes: Carbon listed in the composition table is the total carbon. Can be oil quench hardened from 860°C to attain a Rockwell C 50 minimum surface hardness. Data provided by the manufacturer, Siltin Industries, Inc.
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Physical PropertiesOriginal ValueComments
Density 7.15 g/ccTypical for Gray Cast Iron
 
Mechanical PropertiesOriginal ValueComments
Hardness, Brinell 183 - 234
Hardness, Knoop 258Converted from Brinell
Hardness, Rockwell B 97Converted from Brinell
Hardness, Rockwell C 20Converted from Brinell
Hardness, Vickers 246Converted from Brinell
Tensile Strength, Ultimate >= 276 MPa
Ultimate Compressive Strength >= 1034 MPa
Machinability 0.0 %Very good machinability. No numerical rating available.
 
Component Elements PropertiesOriginal ValueComments
Carbon, C 3.25 - 3.5 %
Chromium, Cr 0.050 - 0.45 %
Copper, Cu 0.15 - 0.40 %
Iron, Fe 91.9 - 94.2 %As Balance
Manganese, Mn 0.50 - 0.90 %
Molybdenum, Mo 0.050 - 0.10 %
Nickel, Ni 0.050 - 0.20 %
Phosphorus, P <= 0.12 %
Silicon, Si 1.8 - 2.3 %
Sulfur, S <= 0.15 %

References for this datasheet.

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