Investment Casting & Sand Casting Foundry

Castings of Stainless Steel, Alloy & Carbon Steel, Cast Iron, etc.

Gray Cast Iron Mechanical Properties

Gray iron, or grey cast iron, is a type of cast iron that has a graphite microstructure. It is named after the gray color of the fracture it forms. The gray cast iron is used for custom grey iron castings where the stiffness of the component is more important than its tensile strength, such as internal combustion engine cylinder blocks, pump housings, valve bodies, electrical boxes, counter weights and decorative castings. Grey cast iron's high thermal conductivity and specific head capacity are often exploited to make cast iron cookware and disc brake rotors. Grey cast iron (also called grey cast iron) is a group of cast iron including several kinds of grade according to different designation of diverse standards. Gray cast iron is a kind of iron-carbon alloy and it gets its name "grey" from the fact that their cutting sections looks grey. The metallographic structure of gray cast iron is mainly composed of flake graphite, metal matrix and grain boundary eutectic. During the grey iron, the Carbon is in the flake graphite. As one of the widely used casting metals, cast gray iron has many advangates in costs, castability and machinablity. 

 

Mechanical Properties of Cast Gray Iron

Tensile Strength of Separately Cast Samples of Gray Cast Irons
Material Designation HT100 HT150 HT200 HT250 HT300 HT350
Equivalent Materials GG-10, EN-GJL-100 GG-15, EN-GJL-150 GG-20, EN-GJL-200 GG-25, EN-GJL-250 GG-30, EN-GJL-300 GG-35, EN-GJL-350
Tensile Strength (MPa) ≥100 ≥150 ≥200 ≥250 ≥300 ≥350
             

Tensile Strength of Cast-on Samples of Gray Cast Irons

Material Designation Wall Thickness of Casting (mm) Tensile Strength (MPa) ≥
Sample Bar Dia. (mm) Sample Block (mm) Castings (Reference)
φ30 φ50 R15 R25
HT150, GG-15, EN-GJL-150 20-40 130 / 120 / 120
40-80 115 115 110 / 105
80-150 / 105 / 100 90
150-300 / 100 / 90 80
HT200, GG-20, EN-GJL-200 20-40 180 / 170 / 165
40-80 160 155 150 / 145
80-150 / 145 / 140 130
150-300 / 135 / 130 120
HT250, GG-25, EN-GJL-250 20-40 220 / 210 / 205
40-80 200 190 190 / 180
80-150 / 180 / 170 165
150-300 / 165 / 160 150
HT300, GG-30, EN-GJL-300 20-40 260 / 250 / 245
40-80 235 230 225 / 215
80-150 / 210 / 200 195
150-300 / 195 / 185 180
HT350, GG-35, EN-GJL-350 20-40 300 / 290 / 285
40-80 270 265 260 / 255
80-150 / 240 / 230 225
150-300 / 215 / 210 205
Note: When the thickness is over 300 mm, the exact mechanical properties are confirmed by the venders and buyers.
             

Tensile Strength of Gray Iron Casting in Different Wall Thickness

Cast Wall Thickness (mm) Material Designation
HT100, GG-1, EN-GJL-100 HT150, GG-15, EN-GJL-150 HT200, GG-20, EN-GJL-200 HT250, GG-25, EN-GJL-250 HT300, GG-30, EN-GJL-300 HT350, GG-35, EN-GJL-350
Tensile Strength (MPa) ≥
2.5-4.0 130 175 220 / / /
4.0-10 270
10-20 100 145 195 240 290 340
20-30 90 130 170 220 250 290
30-50 80 120 160 200 230 260
grey cast iron machining parts
grey cast iron castings for truck

Grey Cast Iron Casting Parts

grey iron casting truck spare parts

Grey Iron Casting Truck Spare Parts


Post time: May-22-2021