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  BS1452 Grade 300 Gray Cast Iron  
 

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

 

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