G2500a Cast Iron and Cast Steel to ASTM A 159 (1983)

G2500a - Specification & Application

  • ASTM A 159 (1983) - Automotive gray iron castings

Used in the products of the automobile, truck, tractor, and allied industries

Chemical composition(wt.%) of G2500a grade: to ASTM A 159 (1983)

Elements Min.(≥) Max.(≤) Similar Remarks
C - 3.40
Si 1.60 2.10
Mn 0.60 0.90
P - 0.15
S - 0.12

G2500a - Detail

Brake drums and clutch plates for moderate service requirements, where high carbon iron is desired to minimize heat checking. Lamellar pearlite ferrite if present not to exceed 15%. 

Mechanical properties of grade G2500a ASTM A 159 (1983)

Proof strength
Rp0.2 (MPa)
Tensile strength
Rm (MPa)
Impact energy
KV (J)
Elongation at fracture
A (%)
Reduction in cross section on fracture
Z (%)
As-Heat-Treated Condition Brinell hardness (HBW)
299 (≥) 171 (≥) 42 33 21 Solution and Aging, Annealing, Ausaging, Q+T,etc 312

Physical properties of grade G2500a ASTM A 159 (1983)

Property Density
kg/dm3
Temperature T
°C/F
Specific heat
J / kgK
Thermal conductivity
W/mK
Electric resistance
µΩ·cm
Modulus of elasticity
kN/mm2
Expansion rate
466 (≥) 353 (≥) 24 13 41 Solution and Aging, Annealing, Ausaging, Q+T,etc 212
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
146 363 617

Equivalent Grade

Equivalent Products

We can customize the production of G2500a grade, contact us for the best solution.
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