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Company: OMEJA CASTING
Phone: +86-15243599988
Email: whp@omj-casting.com
Address: Longnan Economic and Technological Development Zone, Longnan City, Ganzhou City, Jiangxi Province, China
When it comes to precision-engineered metal components, selecting a reliable custom gray and malleable iron casting supplier can make a world of difference. At OMEJA CASTING, we specialize in gray iron and malleable iron casting solutions that meet ISO and ASTM international standards.
With years of foundry experience and modern casting technology, OMEJA delivers high-performance, cost-efficient, and fully customized casting parts to industries such as automotive, construction, machinery, energy, rail, and agriculture.
Our commitment as an ISO & ASTM certified foundry ensures every product meets stringent mechanical and dimensional accuracy — offering customers consistent quality and long-term durability.
Founded in Jiangxi Province, OMEJA CASTING has developed into a leading gray and malleable iron casting manufacturer in China.
Our factory integrates pattern making, mold design, casting production, machining, heat treatment, and inspection under one roof.
Feature | Details |
Foundry Certification | ISO 9001:2015, ISO/TS 16949, ASTM International Standards |
Main Casting Materials | Gray Iron (HT150–HT300), Malleable Iron (KTH300–06, KTH350–10, KTH450–06) |
Casting Processes | Green Sand Casting, Resin Sand Casting, Shell Molding, Lost Foam Casting |
Annual Capacity | 20,000+ tons of finished castings |
Machining Capabilities | CNC lathes, milling, boring, drilling, and surface treatment |
Quality Control | CMM inspection, spectrometer analysis, tensile and hardness testing |
Export Markets | Europe, North America, Australia, and Southeast Asia |
As a custom gray and malleable iron casting supplier, OMEJA’s foundry team works closely with clients to design and produce tailored solutions that fit performance and budget needs.
Gray iron (also known as flake graphite cast iron) is widely used due to its excellent machinability, vibration damping, and wear resistance. The graphite flakes give gray iron its characteristic gray fracture appearance.
Applications:
Engine blocks, cylinder heads
Machine tool bases
Pump housings
Gearbox covers
Brake discs
Advantages:
High thermal conductivity
Good castability
Low cost
Excellent damping properties
Malleable iron is produced by heat-treating white cast iron, converting brittle carbon into temper carbon nodules. The result is a strong yet ductile material ideal for components that require impact resistance and flexibility.
Applications:
Pipe fittings
Agricultural machinery parts
Suspension brackets
Electrical fittings
Construction connectors
Advantages:
High tensile strength
Superior impact resistance
Excellent machinability
Good weldability
Choosing an ISO & ASTM certified foundry like OMEJA CASTING ensures strict quality control, traceability, and compliance with international standards.
ISO Certification (ISO 9001:2015) guarantees that every process — from raw material sourcing to final inspection — follows a consistent quality management system.
ASTM Standards define mechanical and chemical requirements for cast iron grades, ensuring that each casting achieves desired hardness, tensile strength, elongation, and composition.
Reliable product consistency
Enhanced mechanical properties
Global acceptance and compliance
Reduced failure rates and rework
Confidence in long-term partnerships
OMEJA’s custom casting services provide flexibility across design, volume, and material specifications.
Design & Simulation – 3D modeling, mold flow simulation, and material analysis.
Mold Making – CNC pattern machining for dimensional accuracy.
Casting – Automated pouring and temperature-controlled melting.
Heat Treatment – Normalizing, annealing, or quenching for desired strength.
Machining & Finishing – Precision CNC operations and surface coatings.
Quality Inspection – Spectrometer, CMM, and tensile tests ensure compliance with ISO & ASTM standards.
Typical Custom Parts:
Gear housings
Bearing supports
Transmission components
Clutch housings
Valve bodies
Hydraulic pump covers
Whether for prototype development or mass production, OMEJA CASTING can customize each product to meet specific mechanical, dimensional, and performance needs.
Property | Gray Iron | Malleable Iron |
Graphite Form | Flake Graphite | Temper Carbon Nodules |
Tensile Strength (MPa) | 150–300 | 300–450 |
Elongation (%) | 0–1 | 6–10 |
Impact Resistance | Moderate | High |
Machinability | Excellent | Excellent |
Typical Use | Rigid components | Impact-bearing parts |
Interpretation:
If your project requires stiffness and vibration damping, choose gray iron. For toughness and ductility, malleable iron is the better option. OMEJA CASTING engineers can help select the right grade for your application.
OMEJA’s quality assurance system integrates international standards, advanced testing equipment, and traceable documentation.
Key Inspection Methods:
Spectrometer Analysis: Verifies chemical composition
Tensile & Hardness Testing: Confirms mechanical strength
Ultrasonic & Magnetic Testing: Detects internal flaws
CMM Dimensional Inspection: Ensures geometric precision
Visual & Surface Testing: Checks casting finish
Certifications:
ISO 9001:2015
ISO/TS 16949 (Automotive industry quality management)
ASTM A48, A47, A536 material compliance
With these certifications, OMEJA maintains its position as a trusted custom gray & malleable iron casting supplier globally recognized for reliability and consistency.
As an ISO & ASTM certified foundry, OMEJA serves multiple industries with precision and trust.
Industry | Representative Products |
Automotive | Brake calipers, clutch housings, brackets |
Agricultural Machinery | Gearboxes, hubs, housings |
Construction Equipment | Counterweights, couplers, joint fittings |
Energy & Power | Valve bodies, pump casings |
Railway | Coupler components, brake shoes |
Hydraulic Systems | Pump bodies, manifolds |
Each project follows a detailed workflow ensuring tight tolerance, superior surface finish, and guaranteed mechanical performance.
OMEJA CASTING promotes green foundry practices by implementing:
Recyclable sand systems to reduce waste.
Energy-efficient furnaces to lower carbon emissions.
Emission monitoring systems that meet Chinese and international regulations.
As a modern foundry, we take sustainability seriously — ensuring each casting contributes to a safer and cleaner industrial future.
Q1: What’s the difference between gray iron and malleable iron?
A: Gray iron offers excellent damping and machinability but limited ductility, while malleable iron provides higher strength and impact resistance.
Q2: What certifications does OMEJA CASTING hold?
A: We are ISO 9001:2015 and ASTM certified, ensuring strict compliance with global quality standards.
Q3: Can you manufacture according to custom drawings?
A: Yes. Our engineering team works with CAD and 3D files to produce fully customized castings per customer requirements.
Q4: What are your minimum order quantities (MOQ)?
A: Depending on the part size and complexity, our MOQ can be as low as 100 pieces for pilot runs.
Q5: What testing equipment do you use for quality control?
A: Spectrometer, tensile testing machines, hardness testers, CMM, and NDT equipment for defect detection.
Q6: Do you provide machining services after casting?
A: Yes, OMEJA CASTING offers full CNC machining, drilling, and surface finishing to deliver ready-to-assemble parts.
Q7: Which international standards do you follow?
A: We produce castings according to ASTM, DIN, ISO, and GB/T specifications.
Q8: How can I get a quotation?
A: Send your drawings or samples to whp@omj-casting.com — our team will reply with a detailed quote within 24 hours.
As a custom gray & malleable iron casting supplier and ISO & ASTM certified foundry, OMEJA CASTING stands out for its technical expertise, advanced production lines, and commitment to excellence.
We provide:
Material customization (gray, malleable, ductile iron)
Precision machining and heat treatment
Fast delivery and consistent quality
Technical support for product design
OMEJA is not just a supplier — we are your strategic manufacturing partner, supporting your projects from concept to completion.
For inquiries or quotations, reach out today:
Phone: +86-15243599988
Email: whp@omj-casting.com
Address: Longnan Economic and Technological Development Zone, Longnan City, Ganzhou City, Jiangxi Province, China
OMEJA CASTING – Your Trusted ISO & ASTM Certified Custom Gray & Malleable Iron Casting Supplier.
Delivering quality, precision, and performance worldwide.