ASTM A48 Gray Cast Iron

Metal: Ductile cast iron, ASTM A48 class 20, class 25, class 30, class 35, class 40, class 45, class 50, class 55, class 60.

Metal casting: clay sand casting, resin sand casting, shell molding casting

Casting tolerance: ISO 8062 CT9-CT12

Casting surface roughness: 1.6μm Ra ~ 6.3μm Ra

Weight controlled: 0.5~10,000 kgs

Please note that the accuracy level of sand castings is not only affected by the mold process and material quality, but also by the selected metal materials, pouring temperature, and cooling rate. Please contact gina@guokuncasting.com to get a quotation

Iron Casting Tags: pump casing

Description

What is cast iron?

Cast Iron is an iron-carbon alloys with a carbon content 2-4% and silicon content around 1-3%. With its relatively low melting point, good fluidity, castability, excellent machinability, resistance to deformation and wear resistance, cast irons have become an engineering material with a wide range of applications and are used in construction, transportation, oil and gas, pump, valve, marine, power, gearbox, agriculture and railway. In general, cast iron is notoriously difficult to weld.

Types of cast iron

The main types of cast iron are: gray cast iron, white cast iron, ductile cast iron and malleable cast iron. Baoding Guokun can select the suitable cast iron as per customer’s requirements and specifications. And the chemical composition of cast iron will be carefully inspected by Baoding Guokun’s spectrometer.

Gray cast iron	Gray cast iron is the most frequently type of cast iron. It is named for its gray fracture color due to graphite flakes in its composition. The grey cast iron has excellent compressive strength, and good machinability and limited brittleness.
Ductile cast iron	Ductile cast iron or nodular cast iron, is with graphite nodules that provide flexibility and toughness compared to gray cast iron, making the material less brittle overall. It has high tensile strength and impact resistance, making it a good choice for load-bearing components, such as automotive parts, gears, crankshafts, pump parts, gearbox, etc.
White cast iron	Named for its off-white color, which comes from iron compounds called cementite. White cast iron’s hard and wear-resistant surface makes it suitable for many wear-resistant applications, such as milling liners, motor frame, marine parts.
Malleable cast iron	Also known as malleable steel, it comes from annealed white cast iron. It’s resistant to wear and tear, has good plasticity and toughness, and is relatively easy to machine.

Gray cast iron: ASTM A48 Standard Specification for Gray Iron Castings

This specification covers gray iron castings intended for general engineering use where tensile strength is a major consideration. Castings are classified on the basis of the tensile strength of the iron in separately cast test bars. The casting surface shall be free of adhering sand, scale, cracks and hot tears, as determined by visual examination.

ASTM A48 Gray Iron castings

A cast iron castings is typically made from gray iron as it is the most common cast iron due to its good castability, machinability, and vibration damping properties, although in situations requiring higher strength and impact resistance, ductile iron might be used instead.

Gray cast iron	ASTM A48 Standard Specification for Gray Iron Castings, for example, ASTM A48 Class 30, ASTM A48M class 35, ASTM A48 class 40, etc.	More brittle but has better vibration damping and is generally cheaper than ductile iron.
Ductile cast iron	ASTM A536 Standard Specification for Ductile Iron Castings. ASTM A536 grade 65-45-12, ASTM A536 Grade 80-55-06, ASTM Gade 60-40-18, etc	Offers greater strength and ductility, making it suitable for applications with higher impact loads.

Gray cast iron is the most common cast iron and is favored for its strength and affordability. It is produced by sand casting process. Baoding Guokun can use grey cast iron to produce the following products:

Pump casting: Pump casing, pump housing, pump shell, pump back liner, pump cover plate, hydraulic pump parts and other customized pump replacement parts.

Valve casting: Valve body, valve seating, industrial valve fittings and other valve casting components.

Automotive casting: engine blocks, brake systems, brake disc, clutch plates, cylinder liners, and positions, etc.

Agricultural machinery casting parts: plow shares, tillers, irrigation system components, and other tractor casting parts.

Metal casting process of cast iron products

Baoding Guokun casting factory can offer you green sand-casting process, resin sand casting process or shell mold casting process.

The process of Baoding Guokun sand casting involves several steps after producing a professional tool or mold, including:

Ductile iron sand casting technique steps

A High Quality China Foundry！

Guokun Casting, of Baoding Hebei is an ISO 9001-2008 registered iron and steel foundry & supplier of high quality carbon steel, cast iron and machined castings used in power, mining, railway, agricultural, tillage, truck, automobile, pump, valve, motor, pipe fittings and gear industry.

With a monthly capacity of 10,000kgs and with more than 15 years of experience ensure the short delivery and the highest valued iron & steel casting parts.