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AS 1830 T200 is the most common material of gray cast iron. It is used in Australia, also equal to ISO 185/JL/200 and HT200 in China.
This grade is also equal to CLASS 30 in USA, GG20 in Germany, EN-GJL-200 in European, FC200 in Japan, G20 in Italy, FGL200 in France, 200 in UK, FG20 in Spain, FGG20 in Belgium, O120 in Sweden, SJG200 in Norway, etc.
We summarize the following chemical composition, mechanical properties and physical properties for AS 1830 T200 according to ISO 185/JL/200, for your reference.
The Chemical Composition for AS 1830 T200 Gray Cast Iron:
The normal chemical composition for this grade is as the following:
Carbon (C): 3.2-3.5%, Silicon (Si): 2.0-2.5%, Manganese (Mn): 0.6-0.8%, Phosphorus (P): 0.4% max, Sulfur (S): 0-0.15%
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.
Mechanical properties in separately cast test pieces with 30 mm as-cast casting diameter
Characteristic |
Symbol |
SI-unit |
Material designation |
AS 1830 T200 |
ISO 185/JL/200 |
Tensile strength |
Rm |
N/mm2 |
200 to 300 |
0,1% proof strength |
Rp0,1 |
N/mm2 |
130 to 195 |
Elongation after fracture |
A |
% |
0,3 to 0,8 |
Compression strength |
σdb |
N/mm2 |
720 |
0,1% compression yield point |
σd0,1 |
N/mm2 |
260 |
Bending strength |
σbB |
N/mm2 |
290 |
Shear strength |
σaB |
N/mm2 |
230 |
Torsional strengthb |
τtB |
N/mm2 |
230 |
Modulus of elasticityc |
E |
kN/mm2 |
88 to 113 |
Poisson’s ratio |
v |
- |
0,26 |
Bending fatigue strengthd |
σbW |
N/mm2 |
90 |
Fatigue limit under reversed tension-compression stressese |
σzdW |
N/mm2 |
50 |
Fracture toughness |
KIc |
N/mm3/2 |
400 |
NOTE 1 N/mm2 is equivalent to 1 MPa. |
b Torsional fatigue strength τtW ≈ 0,42 × Rm.
c Depends on the quantity and form of the graphite, as well as on the loading.
d The following approximately applies: σbW ≈ 0,35 − 0,50 × Rm.
e The following approximately applies: σzdW ≈ 0,53 × σbW ≈ 0,26 × Rm. |
Physical properties in separately cast test pieces with 30 mm as cast casting diameter
Characteristic |
Symbol |
SI-unit |
Material designation |
AS 1830 T200 |
ISO 185/JL/200 |
Density |
ρ |
kg/dm3 |
7,15 |
Specific heat capacity
Between 20°C and 200°C
Between 20°C and 600°C |
c |
J/(kg K) |
460
535 |
Liner expansion coefficient
Between -100°C and +20°C
Between 20°C and 200°C
Between 20°C and 400°C |
α |
µm/(m K) |
10,0
11,7
13,0 |
Thermal conductivity
at 100°C
at 200°C
at 300°C
at 400°C
at 500°C |
λ |
W/(m K) |
50,0
49,0
48,0
47,0
46,0 |
Resistivity |
ρ |
Ω mm2/m |
0,77 |
Coercivity |
Ho |
A/m |
560 to 720 |
Maximum permeability at room temperature |
μ |
μH/m |
220 to 330 |
Hysteresis losses at B=1T |
|
J/m3 |
2500 to 3000 |
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