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AS 1830 T260 gray iron is a kind of cast iron used in Australia, AS 1830 is the standard and T260 is the material grade. It is equal to ISO 185/JL/275.
We summarize the following chemical composition, mechanical properties and physical properties for AS 1830 T260 according to ISO 185/JL/275, for your reference.
The Chemical Composition for AS 1830 T260 Gray Cast Iron:
For gray iron casting, there is no any standard mentioned the chemistry composition, so the iron foundry could adjust the chemical composition according to their experience, but the mechanical properties are the necessary requirement.
Mechanical properties in separately cast test pieces with 30 mm as-cast casting diameter
Characteristic |
Symbol |
SI-unit |
Material designation |
AS 1830 T260 |
ISO 185/JL/275 |
Tensile strength |
Rm |
N/mm2 |
275 to 375 |
0,1% proof strength |
Rp0,1 |
N/mm2 |
180 to 245 |
Elongation after fracture |
A |
% |
0,3 to 0,8 |
Compression strength |
σdb |
N/mm2 |
900 |
0,1% compression yield point |
σd0,1 |
N/mm2 |
360 |
Bending strength |
σbB |
N/mm2 |
365 |
Shear strength |
σaB |
N/mm2 |
320 |
Torsional strengthb |
τtB |
N/mm2 |
320 |
Modulus of elasticityc |
E |
kN/mm2 |
105 to 128 |
Poisson’s ratio |
v |
- |
0,26 |
Bending fatigue strengthd |
σbW |
N/mm2 |
130 |
Fatigue limit under reversed tension-compression stressese |
σzdW |
N/mm2 |
68 |
Fracture toughness |
KIc |
N/mm3/2 |
520 |
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 T260 |
ISO 185/JL/275 |
Density |
ρ |
kg/dm3 |
7,20 |
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) |
48,0
47,0
46,0
44,5
43,5 |
Resistivity |
ρ |
Ω mm2/m |
0,72 |
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:
Pistons, end caps, glands, support bearings, control valves, rotors.
Slide rails, gear wheels, cams, bushes, helical gears, spiral gears.
Pistons, piston rings, liquid and vacuum pump rotors, cylinder liners. Burners, blow moulds, burn off chucks, bottom plates, blanks, moulds, and textile machinery parts, ship repairs.
Worldwide equivalents of Grade T260 (Australia: AS 1830)
Australia
AS |
EU
EN |
USA
- |
Germany
DIN,WNr |
Japan
JIS |
France
AFNOR |
England
BS |
Italy
UNI |
Belgium
NBN |
T260 |
EN-GJL-250 (EN-JL1040) |
250/275
35
35B
40
40B |
0.6025
GG25 |
FC250 |
FGL250
Ft25D |
250
260 |
G25 |
FGG25 |
China
GB |
Sweden
SS |
Bulgaria
BDS |
Hungary
MSZ |
Poland
PN |
Romania
STAS |
Austria
ONORM |
Spain
UNE |
Norway
NS |
HT25-47
HT250 |
01-25-00
0125 |
Vch25 |
OV25 |
Z125 |
FC250 |
GG25 |
FG25 |
SJG250 |
Russia
GOST |
Inter
ISO |
India
IS |
Netherlands
NEN |
Denmark
DS |
Taiwan
- |
Luxembourg
- |
COPANT
- |
SCH25 |
JL275 |
FG260 |
GG25 |
GG30 |
FC250 |
FGG25 |
FG250 |
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