Gray Cast Iron for Machinery Parts Part Prices Per Kg

Gray cast iron is a foundational material in machinery manufacturing, valued for its cost-effectiveness, reliable mechanical properties, and manufacturing versatility. With part prices typically ranging between $1.7–$2.0 per kilogram (or ¥10–12/kg in domestic markets) -1-9, it remains a competitive choice for industrial components. This article explores its material characteristics, production processes, and applications to help engineers and procurement specialists make informed decisions.

Material Properties and Advantages

Gray cast iron, primarily composed of iron, carbon (2.7–4.0%), and silicon (1.0–2.0%) -2, derives its name from the gray fracture surface formed by its unique graphite flake structure -2. This microstructure delivers exceptional damping capacity -1, making it ideal for components requiring vibration reduction, such as machine bases and engine blocks. Key properties include:

• Compressive Strength: Comparable to steel, ensuring stability under heavy loads -2.

• Wear Resistance: Suitable for sliding components like guides and pistons -1.

• Castability and Machinability: Allows for intricate shapes and smooth finishes (e.g., Ra ≤3.2 μm) with minimal tool wear -1-6.
  While its tensile strength (100–350 MPa, depending on grades like HT100 to HT350) is lower than ductile iron or steel -1-2, its low notch sensitivity and thermal conductivity suit high-temperature environments, such as exhaust manifolds or cylinder heads -4.

Production Processes and Cost Efficiency

The affordability of gray cast iron stems from efficient manufacturing methods like sand casting (e.g., resin-bonded molds) -5 and clay sand molding -5. These processes minimize material waste and secondary machining, reducing production costs. Key steps include:

1. Melting and Inoculation: Precise control of carbon equivalents and additives (e.g., silicon) refines graphite flakes, enhancing strength -3.

2. Heat Treatment: Stress-relief annealing (500–600°C) prevents deformation, while surface hardening improves wear resistance -6.

3. Quality Assurance: Standards like GB/T 9439-2010 -1 ensure hardness (163–255 HB for HT100 -1) and pressure tightness, critical for hydraulic components.

By optimizing cooling rates and using synthetic iron (e.g., high scrap steel ratios) -3, foundries achieve higher performance grades like HT250 at lower costs -7.

Applications in Machinery and Industry

Gray cast iron’s balance of performance and economy makes it ubiquitous in:

• Automotive Systems: Engine blocks, cylinder liners, and brake drums -1-4.

• Industrial Equipment: Machine tool beds, gearbox housings, and pump bodies -2-5.

• Structural Components: Frames, brackets, and press frames where rigidity and vibration damping are critical -6.

Its adaptability to complex geometries—such as thin-walled engine housings -5—further solidifies its role in cost-sensitive yet performance-driven sectors.

Conclusion

Gray cast iron offers an unparalleled combination of functional reliability, manufacturing adaptability, and per-kg affordability. For machinery parts subjected to static loads, friction, or vibrations, it continues to be a smart, economical solution. Partnering with a certified foundry ensures compliance with international standards (e.g., ISO, ASTM) -5 and consistent quality for large-scale production.

1.Investment-casting production process: The model number L001 utilizes a cutting-edge investment casting process for the Stainless Steel Valve Body, ensuring superior quality and precision.

2.Compatibility with various industries: This product is tailor-made for Machinery Parts applications, being suitable for a wide range of industrial sectors.

3.ISO/TS/RoHS certifications: Pengxin boasts adherence to strict quality and safety standards with its ISO9001/TS16949/RoHS certifications, assuring customers of reliable and eco-friendly products.

4.High production efficiency: Situated in the traditional industrial production hub of Dandong City, Liaoning Province, the factory encompasses a 5,000 square meter facility housing over 600 employees, with engineers accounting for 2/3 of the workforce.

5.Comprehensive services: pengxin offers a one-stop service package, including customization and OEM/ODM services, ensuring that customers' unique needs and requirements are met efficiently and effectively.

Established in 1998, Dandong City Pengxin Machinery Co., Ltd. excels as a versatile private enterprise, integrating casting, machining, and assembly. Based on a 66,000 square-meter site, its 40,000 square-meter plant houses a 220 million yuan fixed asset value and a workforce of 330 personnel, including 46 technical and managerial staff.

The company manufactures various ductile iron, gray iron castings, and compacted graphite irons capable of annual production capacity up to 100,000 tons. Key products include engine flywheels, clutch pressure plates, brake discs, chassis parts, axle components, boxes, body pumps, etc. These engineering marvels have forged strong partnerships with Dahua Kyrgyzstan, Changchun Yidong Clutch Co., Ltd., SG Automotive Group, Shenyang Brilliance, CRRC-Shenyang, Great Wall Motor, and Fawer shock absorbers.

Of note, Dandong City Pengxin Machinery Co., Ltd.'s AMF-07L & R, AMF-08L, and 1.5-ton electric furnace technologies, coupled with Oxford spectrometers and Germany Bruker spectrometry, enable comprehensive physical and chemical analysis. The robust machining center, including Taiwan and USA USA heck heck machining centers and CNC automatic lathe, Germany WENZER CMM, and over 170 CNC lathes, mills, drills, etc., ensures high precision.

In a commitment to quality, the company holds certifications such as ISO9001-2015, IATF 16949-2016, AD2000-Merkblatt W0 pressure vessel material quality system certification. US Environmental Protection Agency (EPA), OSHA 18001, ISO 14001, and Quality Management System certifications further attest to its rigorous quality control. The foundry industry has a high-level team of expert advisers for product development and technology research.

Dandong City Pengxin Machinery Co., Ltd. adheres to the modern management mode, with strong partnerships and technological prowess exhibited by its production machinery, inspection equipment, and high-quality products. The company's commitment to innovation and customer satisfaction is reflected in its ability to work with prominent international players such as John Deere from the US, Binotto from the UK, Mercedes-Benz, Weir from Italy, WILO from Germany, and KOBERT from Austria. Our professionals look forward to establishing long-lasting relationships with customers and partners alike. Visit our state-of-the-art facility to experience our offerings first-hand.

Your satisfaction is our pursuit, and our team is dedicated to providing the best products and services. We are poised to rise together on this exciting journey!

1. who are we?
We are based in Liaoning, China, start from 2020,sell to North America(42.00%),Western Europe(25.00%),Northern Europe(14.00%),Eastern Europe(11.00%),Southeast Asia(8.00%). There are total about 51-100 people in our office.

2. how can we guarantee quality?
Always a pre-production sample before mass production;
Always final Inspection before shipment;

3.what can you buy from us?
Sand Casting,Shell Casting,Investment Casting,Gravity Casting,Machining Parts

4. why should you buy from us not from other suppliers?
Dandong City Pengxin Machinery Co., Ltd (PX-Casting) is a professional manufacture focusing on forging, casting and machinery. We produce forging & casting parts according to your own specifications via our highly-control production process. Our customiz

5. what services can we provide?
Accepted Delivery Terms: FOB,CFR,CIF,EXW,FAS,CIP,FCA,CPT,DEQ,DDP,DDU,Express Delivery,DAF,DES;
Accepted Payment Currency: USD,EUR,JPY,CAD,AUD,HKD,GBP,CNY,CHF;
Accepted Payment Type: T/T,L/C,D/P D/A,MoneyGram,Credit Card,PayPal,Western Union,Cash,Escrow;
Language Spoken: English,Chinese,Spanish,Japanese,Portuguese,German,Arabic,French,Russian,Korean,Hindi,Italian