Machinery Gear Parts Ductile Cast Iron Casting ASTM A536 Material Sand Castings Foundry

Product Description and Process

1. Machinery Gear Parts Ductile Cast Iron Casting ASTM A536 Material Sand Castings Foundry

2. Production process: green sand molding, pre-coated sand molding and resin sand molding which can produce iron castings from 50 gram to 2000 kilograms

3. Machining process: CNC machine, machining center, lathe, mill machine, drill machine, etc.

4. Surface treatment process: paint coating, electrophoretic coating, electrogalvanizing coating, black oxide coating, phosphate coating, powder coating, etc.

Product Material and Uses

1. Normally produce with gray iron HT200, HT250, ductile iron 65-45-12, 60-40-18, 80-55-06, 80-60-03, etc.
2. The ductile iron casting products are widely used for Auto-cars, trains, trucks, vehicle components, mining machinery components, agricultural machinery parts, textile machinery parts, construction machinery parts, valves and pump parts, etc.

Ductile Iron Castings & Ductile Cast Iron

If cast iron is subject to a compressive load, these stress points are not particularly detrimental and flake graphite cast iron is excellent under compression. However, tensile loading above the natural tensile strength of the cast iron can cause rapid tensile failure as cracks propagate rapidly out from these stress points. The result of this is that cast iron has virtually no elongation, is a brittle material and is therefore limited in its use in tensile and shock loading applications. For years foundrymen and metallurgists tried to develop a new type of cast iron that would withstand bending and shock loading and would have the characteristics more of malleable cast iron but could be produced at the lower cost of grey cast iron. This resulted in the development of Ductile Cast Iron.

What is the difference between Ductile Iron and Cast Iron?

Cast iron refers to all iron parts that are cast and have a high carbon content, but in normal usage, “cast iron” refers to gray iron, the cast parts with weaker iron structures containing graphite flakes. Ductile iron must specifically have the spherical graphite structure in the metal.
Regular cast iron can be cast cheaply, machined very easily, and strength can be added through heat treating. Gray iron lacks the strength and durability of ductile cast iron. Ductile iron castings are not much more expensive than gray iron castings yet if there is no need for the benefits of ductile iron you should probably stick with the gray iron castings.

What is in Ductile Iron? (Composition)

If you were to do a chemical analysis of ductile iron, this is what you would normally find:
Iron ~94%
Carbon 3.2 – 3.60%
Silicon 2.2 – 2.8%
Manganese 0.1 – 0.2%
Magnesium 0.03 – 0.04%
Phosphorus 0.005 – 0.04%
Sulfur 0.005 – 0.02%
Copper <= 0.40%
To improve the strength of ductile iron, additional tin or copper can be added. To improve corrosion resistance, copper, nickel, or chromium can replace anywhere from 15-30% of the iron.

Ductile Iron Grade Chart
ASTM A536 1993 (USA)

GB/T 1348 1998 (China)

Low temperature V notch impact tested (-20±2℃)

Common Ductile Iron Grades

While there are many different ductile iron specifications, foundries routinely offer 3 common grades;

Zhengzhou Yu-Long Machinery Equipment Co., Ltd.is located in Zhengzhou city, Henan Province, China. The city of Zhengzhou is featured of the transportation hub of China with convenient transportation and abundant resources.

Zhengzhou Yu-Long Machinery Equipment Co., Ltd. is a powerful combination of trade and manufacture. As an OEM supplier of over 10 year exporting experience, Yu-Long company has professionally provided the iron and steel casting, forging parts, metal stamping, and machining products, as well as technical services after sales.

We supply the casting, forgings, metal stamping products, and machining products mainly according to the drawings or samples from the customers, following the customer-designated standards such as ASTM, BS, DIN or JIS. The products are used in many industrial fields such as auto cars, trucks & trailers, trains, oil and gas pipelines, machinery equipments, power devices and so on. These products are mostly exported to the North America, Europe, Australia, and Japan, and we have established long term and close relationship with our customers with our good quality and excellent service.

Through more than ten years growth, we have accumulated abundant experience and resources, and are still being exploring and making progress.

All staff in Yu-Long have a common faith: through our effort, continuously production process improvement, scientific production arrangement, finally provide the high quality products with competitive price to our customers.

Our office environment

Our foundry shop 

Our machining shop

Our Products

1. Parts used for autos, trucks, and trailers:

Front hanger castings; Top pad castings; Rear hanger castings; Upper kingpin connection castings;

Torque rod castings; Exhaust plug castings; Flange castings; Rivet castings; Trigger pin castings;

Outrigger castings; Wheel hub castings; Actuating cam castings;

2. Parts used for trains:

Manganese steel wear plate castings; Handle castings; Actuating lever castings; Control Rod Assembly castings; Clevis castings; Tee branch castings; Actuating tube castings; Actuating collar castings;

3. Parts used for municipal constructions and residence water tubes, coal gas tubes, natural gas tubes and so on:

Sleeve body cast steel parts; Saddle bodies castings; Cast iron bonnets; Manhole cover casting;

Tube coupling body castings;

4. Parts used for engineering and machinery equipments:

Cast iron pistons; Stuffing box castings;

5. Gear box parts:

Turbo Box castings;

6. Hardware and tools products;

Door hinge base parts; hinge stamping parts; Door hinge strap parts; Lift handle stamping parts;

Anchor stamping parts; spring gauge parts; Spring plug repair block casting; Sheave castings;

Sheave block castings; bolts and nuts; Washer castings; Manhole cover hooks; Inverted trolley castings;

7. Chainwheels:

Stainless steel safety restraint caps; ductile iron chainwheels; Stainless steel chainwheels; Aluminum chainwheels;

8. Valves:

All types of valves made of different materials;

9. Parts used for agricultural machinery equipment; Mining machinery and equipment.

The material standards we have used:

1. Carbon Steel Casting: ASTM A27 (Grade 60-30, 65-35, 70-36);

2. Grey Iron Casting: ASTM A48 (Class 20 A B C S; Class 25 A B C S; Class 30 A B C S; Class 35 A B C S);

3. Grey Iron Castings used on valve flanges and pipes: ASTM A126-04 (Class A B C);

4. High Manganese Steel Casting: ASTM A128/128M-93

5. Structure High Strength Steel: ASTM A148 (80-40, 80-50, 90-60, 105-85);

6. Grey Iron Castings used on vehicles: ASTM A159 (G 2500a; G 3500b);

7. Carbon Steel Casting used in high temperature with good weldability: ASTM A216 (WCA, WCB, WCC);

8. Pressure Steel Castings: ASTM A487/487M;

9. Wear-resistant Ductile Iron Casting: ASTM A532/A522M (12%Cr; 15%Cr-Mo);

10. Ductile Iron Casting: ASTM A536-84 (60-40-18; 65-45-12; 80-55-6; 80-60-03);

11. Isothermal Quenching (austenite) Ductile Iron Castings: ASTM A 897-97 (850-550-10; 1050-700-7; 1200-850-4; 1400-1100-1);

12. Stainless Steel Castings: ASTM A747-89 (CF8M; CF3M; CF8; CF3);

13. Aluminum Castings: ASTM B26 (A201, A204, A208)

14. Forging parts: 1020 steel, 1035 steel, 1045 steel, 4140 steel, 1541 steel etc.

We also can meet the BS, DIN and JIS standards.

Chemical Components and Mechanical Properties Inspection Equipments

Our customers distribution

Our Contact Information 

Zhengzhou Yu-Long Machinery Equipment Co., Ltd.

High-Tech Zone, Zhengzhou City, Henan Province, China 

Email: yuloncasting@163.com 

Sales Manager: James Wang