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G1800 material is SAE A 159 (2011) Automotive Gray Iron Castings Used in the products of the automobile, truck, tractor, and allied industries. Miscellaneous soft iron castings (as cast or annealed) in which strength is not of primary consideration. Exhaust manifolds may be made of this grade of iron, alloyed or unallo.

Chemical composition of G1800, G1800 mechanical properties, G1800 datasheet, G1800 equivalent grade, Heat treatment and temperature process of G1800.

G1800 property sheet

G1800 Spec.

SAE A 159 (2011)
Automotive Gray Iron Castings

Related Materials


Chemical Composition of G1800

C: 3.40 3.70
Si: 2.30 2.80
Mn: 0.50 0.80
P: Max 0.25
S: Max 0.15
CEV: 4.25 4.5

Mechanical Properties of G1800

Rp0.2 (MPa) 485 (≥)
Rm (MPa) 163 (≥)
AKV (J) 34
A (%) 22
Z (%) 23
Hardness HBW 314

G1800 shape and dimensions

G1800 Round bar: 1mm-800mm
G1800 Square bar: 10mm * 10mm-600mm *600mm
G1800 Flat bar: Thickness:8mm-800mm Width:10mm to 1500mm
G1800 Sheet or Plate: Thickness:3mm-80mm Width:1.5mm to 1500mm
G1800 Strip or Coil: Thickness:0.1mm-3mm Width:1.5mm-1500mm
G1800 Forgings: Shafts with flanks/pipes/tubes/slugs/donuts/cubes/other shapes