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ASTM A48 CLASS 50 Standard gray iron test bars, as cast, required 1638 kg transverse load on test bar.
Honestly, our Dandong Foundry can not produce this material grade for now, so just sharing this material specification for reference.
Physical Properties of ASTM A48 CLASS 50 Gray Cast Iron
Density 7.15 g/cc (0.258 lb/in³)
Mechanical Properties of ASTM A48 CLASS 50 Gray Cast Iron
Hardness, Brinell 262
Hardness, Knoop 292
Hardness, Rockwell C 22.6
Hardness, Vickers 277
Tensile Strength, Ultimate 362 MPa (52500 psi)
Modulus of Elasticity 130 - 157 GPa (18900 - 22800 ksi)
Ultimate Compressive Strength 1130 MPa (164000 psi)
Poissons Ratio 0.29
Fatigue Strength 148 MPa (21500 psi)
Shear Modulus 50.0 - 55.0 GPa (7250 - 7980 ksi)
Shear Strength 503 MPa (73000 psi)
Component Elements Properties of ASTM A48 CLASS 50 Gray Cast Iron
Carbon, C 3.25 - 3.5 %
Chromium, Cr 0.050 - 0.45 %
Copper, Cu 0.15 - 0.40 %
Iron, Fe 91.9 - 94.2 %
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 %
As for normal grey iron, the chemical composition is not important comparatively. The iron foundries could adjust the compositions according to their experience as long as they could meet the physical and mechanical requirements. |
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