Cast Grey Iron En-GJL-250 Castings

Ningbo Supreme Machinery Co., Ltd is a professional gray iron and Cast Grey Iron En-GJL-250 Castings manufacturer and supplier in China.

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Product Description

Grey iron EN-GJL-250, or grey cast iron, is a type of cast iron that has a graphite microstructure. It is named after the grey colour of the fracture it forms, which is due to the presence of graphite. It is the most common cast iron and the most widely used cast material based on weight.

EN-GJL-250 Equivalent Grades

ISO 185 - Class 250

GB 9439 - HT250 in China

ASTM A48 - Class 35 in USA

UNI 5007 - G25 in Italy

UNF - FG25 in Spain

AS 1830 - T250 in Australia

NS11 100 - SJG250 in Norway

EN-GJL-250 Chemical Composition

The normal chemical composition should be C = 2.8-3.3, Si = 1.2-1.7, Mn = 0.8-1.2, P ≤ 0.15, S ≤ 0.12.

EN-GJL-250 Mechanical Properties

Tensile Strength ≥ 250 Mpa

Yield Strength: No Requirement.

Hardness Range: 190 to 240 BH

EN-GJL-250 Advantages

This grade has comparatively high tensile strength, and will not need additional heat treatment, so its production cost is still kept low. However, its hardness is comparatively high, so as for the castings parts with thin wall thickness, the hardness for some positions will be very high, over 200 BH, therefore, will cause difficulty to machining, especially to drilling and milling.

Item Name	Cast Grey Iron En-GJL-250 Castings
Production Process	Sand Casting / Clay Sand Casting / Green Sand Casting/ Resin Sand Casting
Casting Manufacturer	Supreme Machinery Co.,Ltd
Quality Control	Spectrum Analyzer, Three-Coordinate Detector, Metallographic Analyzer, Tensile Testing Machinery
Standards	ASTM A48, ISO 185, DIN 1691, EN 1561, JIS G5501, UNI 5007, NF A32-101, BS 1452, IS 210,
Material Grade	EN-GJL-250
Application	Machinery
Machining Tolerance	0.01-0.05
Inspection Method	visual, dimensional, X-ray inspection

Production Process

We have updated our production line for making Cast Grey Iron En-GJL-250 Castings

Our production process include resin sand molding line, shell molding line, green sand casting and lost wax investment casting production process.

Machining Workshop

We have full set line of machining facilities, various CNC equipment and Machining Center can meet customers’ requirements. After machining, the casting parts will be completed. Then, they will be inspected and packed for delivery and shipment.

Quality Contro

Checking the raw material after they reach our factory------- Incoming quality control

Checking the details before the production line operated

Have full inspection and routing inspection during mass production---In process quality control

Checking the goods after they are finished---- Final quality control

Checking the goods after they are finished-----Outgoing quality control

Packing and Delivery

Packaging of Cast Grey Iron En-GJL-250 Castings can be customized based on customer requirements to meet the different needs, such as plastic bag, carton box, wooden case, crate, etc.