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AS 1830 T300 gray iron is a kind of cast iron used in Australia, AS 1830 is the standard, and T300 is the material grade. It is equal to ISO 185/JL/300.
The chemical composition for AS 1830 T300 Gray Cast Iron:
The normal chemical composition for this grade is as the following:
C |
Si |
Mn |
S |
P |
3 - 3.2 |
1.3 – 1.9 |
0.7 - 1 |
max 0.12 |
max 0.2 |
This is just an experience data. According to the related standards, the mechanical properties are the inspection standard. The iron foundries can adjust the chemical components according to their own experience.
Mechanical properties in separately cast test pieces with 30 mm as-cast casting diameter
- Summarized from ISO 185/JL/300, for your reference.
Characteristic |
Symbol |
SI-unit |
Material designation |
AS 1830 T300 |
ISO 185/JL/300 |
Tensile strength |
Rm |
N/mm2 |
300 to 400 |
0,1% proof strength |
Rp0,1 |
N/mm2 |
195 to 260 |
Elongation after fracture |
A |
% |
0,3 to 0,8 |
Compression strength |
σdb |
N/mm2 |
960 |
0,1% compression yield point |
σd0,1 |
N/mm2 |
390 |
Bending strength |
σbB |
N/mm2 |
390 |
Shear strength |
σaB |
N/mm2 |
345 |
Torsional strengthb |
τtB |
N/mm2 |
345 |
Modulus of elasticityc |
E |
kN/mm2 |
108 to 137 |
Poisson’s ratio |
v |
- |
0,26 |
Bending fatigue strengthd |
σbW |
N/mm2 |
140 |
Fatigue limit under reversed tension-compression stressese |
σzdW |
N/mm2 |
75 |
Fracture toughness |
KIc |
N/mm3/2 |
560 |
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
- Summarized from ISO 185/JL/300, for your reference.
Characteristic |
Symbol |
SI-unit |
Material designation |
AS 1830 T300 |
ISO 185/JL/300 |
Density |
ρ |
kg/dm3 |
7,25 |
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) |
47,5
46,0
45,0
44,0
43,0 |
Resistivity |
ρ |
Ω mm2/m |
0,70 |
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 |
Applications for AS 1830 T300 Gray Cast Iron:
Used for important castings in machinery manufacturing, such as bed guide rails, lathes, punching machines, large stressed beds, spindle box gears, etc. Also can be used for high pressure cylinders, pump bodies, valve bodies, upsetting dies, cold dies and surface quenching parts.
Worldwide equivalents of grade T300 (Australia: AS 1830):
Australia
AS |
EU
EN |
USA
- |
Germany
DIN,WNr |
Japan
JIS |
France
AFNOR |
England
BS |
Belgium
NBN |
Italy
UNI |
T300 |
EN-GJL-300 (EN-JL1050) |
CLASS 40 CLASS 45 |
0.6030
GG30 |
FC300 |
FGL300
Ft30D |
300 |
FGG30 |
G30 |
China
GB |
Sweden
SS |
Bulgaria
BDS |
Hungary
MSZ |
Poland
PN |
Romania
STAS |
Netherlands
NEN |
Austria
ONORM |
HT3-54
HT300 |
01-30-00
0130 |
Vch30 |
OV30 |
Z130 |
FC300 |
GG30 |
GG30 |
Norway
NS |
Russia
GOST |
Inter
ISO |
India
IS |
Spain
UNE |
Taiwan
- |
Luxembourg
- |
COPANT
- |
SJG300 |
SCH30 |
JL300 |
FG300 |
FG30 |
FC300 |
FGG30 |
FG300 |
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