BS1452 Grade 300 is a gray iron grade with high tensile strength, however, its price is also higher than Grade 200.
You could choose it when your casting parts require high tensile strength, and also some good properties of gray cast iron.
Chemical Analysis of BS1452 300 Grey Cast Iron(mass fraction)(%)
Carbon |
2.90-3.45% |
Phosphorous |
0.30% max |
Manganese |
0.45-0.70% |
Sulphur |
0.10% max |
Silicon |
2.10-2.90% |
Iron |
balance |
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.
Typical Properties of BS1452 300 Grey Cast Iron
Typical Tensile range of material (subject to section) N/mm² 185-220
Typical Hardness HB 190-260
Mechanical properties shown are typical and may vary subject to the size and section of this cast iron grade.
Tensile Strength of Gray Iron Casting in BS 1452 Grade 300
Grade |
Wall Thickness of Casting
/mm |
Tensile Strength σb≥/Mpa |
Test Bar with Casting |
Casting |
300 |
10~20
20~40
40~80
80~150
150~300 |
—
250
220
210
190 |
270
240
210
195
— |
Equivalent Grades of BS1452 300 Gray Cast Iron:
Country |
Standard |
Material Grade |
|
ISO |
ISO 185 |
GRADE 300 |
|
China |
GB 9439 |
HT300 |
|
USA |
ASTM A48 |
CLASS 40, CLASS45 |
|
Germany / Austria |
DIN 1691 |
GG30 |
|
European |
EN 1561 |
EN-GJL-300 |
|
Japan |
JIS G5501 |
FC300 |
|
Italy |
UNI 5007 |
G30 |
|
France |
NF A32-101 |
FGL300 |
|
UK |
BS 1452 |
300 |
|
Spain |
UNF |
FG30 |
|
Belgium |
NBN 830-01 |
FGG30 |
|
Australia |
AS 1830 |
T300 |
|
Sweden |
SS 14 01 |
O130 |
|
Norway |
NS11 100 |
SJG300 |
|
