Cast iron ASTM A48 class 35 is a high-grade gray cast iron. This class is equal to HT250, FC250, GG25, G25, FGL250, T260, O125. Today, YIDE Casting will introduce to you the application, properties, chemical composition and our insights of this grade of gray cast iron.
Applications of ASTM A48 class 35
This iron grade is widely used to produce many castings with high tensile strength and hardness. This grade can meet high tightness and corrosion resistance requirements. The applications are as follows: boiler sprocket, cylinder, gear, base,, mechanical bed, cylinder block, cylinder liner, piston, gear box, brake wheel, connecting plate, medium pressure valve body, etc.
ASTM A48 class 35 gray iron is a common material with a wide range of applications. But compared with other cast iron materials, its total output is not large. This is because its hardness is difficult to control in production. If the Brinell hardness is higher than 200, it will cause difficulties in drilling and milling. Lower than 200 will reduce the class to 30. Therefore, if ASTM A48 class 30 can meet your application requirements, then it will be a better choice than grade 35.
Properties of ASTM A48 class 35
For this grade of cast iron, the tensile strength of the test rod should be a minimum of 250 MPa. And the hardness should be 190-240 HB. The metallographic structure should be pearlite.
Chemical compositions of ASTM A48 class 35
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. We can take properties as inspection standards. However, the chemical composition is only the reference data of the foundry’s experience and cannot be used as an inspection specification.
Most iron foundries in China can produce this grade of cast iron. However, if you have strict requirements for hardness, you should clearly state these requirements on the drawing. Hardness will be a key technical issue for production and inspection.
Yide Casting is a casting trade company, belongs to JM casting manufacturer. our casting foundry is known for top-quality grey iron casting, ductile iron cast and brass casting products at our local place. We provide both casting and machining service for our customers, and also cooperate with other strong ability steel casting foundry. We want to provide best cast iron products to our customers, and also provide OEM and ODM service. If you are looking for “JM” casting products, or you are looking for casting iron factory, please don’t hesitate to contact us. Send us your drawing file and we will make a sample according to your parameters as soon as possible.