Gunmetal Flat Bars
Gunmetal Flat Bars are precision-engineered components widely used in various industrial applications due to their excellent corrosion resistance and mechanical strength. Manufactured from a copper-based alloy primarily containing tin and zinc, these flat bars offer superior durability and wear resistance, making them ideal for heavy-duty environments. Their flat, rectangular cross-section allows for easy fabrication and integration into complex assemblies.
These bars typically come in a range of thicknesses and widths to accommodate diverse engineering requirements. With high tensile strength and good machinability, they are suitable for manufacturing valves, pumps, marine fittings, and bearing components. The alloy’s resistance to seawater corrosion makes it particularly valuable in maritime and offshore industries.
Produced under stringent quality control measures, the product adheres to international standards such as ASTM B505 and BS EN 1982, ensuring consistency and reliability for global clients. Surface finish options include polished and mill finish, catering to both functional and aesthetic preferences. Custom dimensions and heat treatment processes are also available to meet specific project demands.
Due to their robust properties and versatility, these bars are essential in sectors such as automotive, aerospace, and heavy machinery. They facilitate enhanced performance in environments subject to friction, pressure, and chemical exposure. Their adaptability to welding and soldering processes further expands their usability across various fabrication workflows.
Export-ready packaging and documentation comply with international shipping regulations, ensuring safe delivery to industrial buyers worldwide. Suppliers typically provide certifications, material test reports, and traceability data to support quality assurance and regulatory compliance. This focus on export readiness makes these flat bars a reliable choice for multinational manufacturing operations.
Lead Time
2–7 weeks depending on size
Delivery Terms
FOB, CIF, DDP
Shipping Modes
Sea / Air / Express
Why Gunmetal Flat Bars Are Preferred by Global Buyers
- ✔ Factory Pricing: Direct manufacturer rates with bulk stock
- ✔ Certified Quality: ISO & 3rd-party tested, EN 10204 certified
- ✔ Export-Ready: Sea-worthy packaging for on-time delivery
- ✔ Fast RFQs: Quick quotes for custom sizes & quantities
- ✔ Traceability: 100% heat number tracking from raw material to finished product
Trusted by industries like oil & gas, petrochemicals, power, marine, and heavy engineering.
- Manufacturing Capacity: 550 MT / Month
- Export Experience: 10+ Years
- Countries Served: 50+
- Annual Export Volume: 5,530 MT
Table of Contents
- 1. What is Gunmetal Flat Bars
- 2. How to Choose the Right Manufacturer
- 3.Comparison of Gunmetal Flat Bars
- 4. Why Global Buyers Source from Ragnar Metals and Tubes
- 5. Features
- 6. Technical Overview
- 7. Specifications
- 8. Available Grades
- 9. Available Sizes
- 10. Chemical Properties
- 11. Mechanical Properties
- 12. Physical & Thermal Properties
- 13. Electrical Resistivity
- 14. Equivalent Grades
- 15. Manufacturing Process & Heat Treatment
- 16. Various Types
- 17. Applications & Uses
- 18. Industries We Serve
- 19. Latest Price List
- 20. MOQ & Payment Terms
- 21. Export Packaging & Shipping
- 22. Cities We Supply in India
- 23. Countries We Export Worldwide
- 24. Our Certifications
- 25. Quality Inspection & Testing
- 26. Our Other Product Types
- 27. People Also Search For
- 28. Frequently Asked Questions
- 29. About Ragnar Metals and Tubes
How to Choose the Right Gunmetal Flat Bars
India is home to hundreds of manufacturers ranging from small job shops to large ISO-certified exporters. International and domestic buyers typically evaluate manufacturers based on quality compliance, production capacity, export experience, and pricing transparency.
- Certification & international standards (ASME, ASTM, EN)
- Manufacturing capability vs trading activity
- Export documentation & inspection support
- Stock availability & lead time reliability
- Past supply experience in oil & gas, EPC & heavy industries
Comparison Factors Among Gunmetal Flat Bars
| Evaluation Factor | Small Local Suppliers | Trading Companies | ISO-Certified Manufacturers |
|---|---|---|---|
| Manufacturing Control | Limited | None | Full in-house / audited partners |
| International Standards | Basic | Depends on source | ASME / ASTM / EN |
| Inspection & MTCs | Limited | Inconsistent | EN 10204 3.1 / 3.2 |
| Export Experience | Low | Medium | 50+ countries |
| Risk for EPC Projects | High | Medium | Low |
International buyers typically prefer ISO-certified manufacturers for large-scale or critical applications due to better quality control, documentation, and lower project risk.
Why Global Buyers Choose Ragnar Metals and Tubes
Ragnar Metals and Tubes is a trusted ISO 9001:2015 certified manufacturer and global exporter of ferro alloys and metal products, supplying consistent, high-quality materials to customers across USA, UK, Europe, Middle East, Africa, and Asia-Pacific. Our focus on quality assurance, cost efficiency, and on-time delivery makes us a preferred sourcing partner for international buyers.
| Key Advantage | Buyer Benefit |
|---|---|
| ISO 9001:2015 Certified Manufacturing | Consistent quality with documented QA systems and process control |
| ASME / ASTM / EN Compliant Products | Globally accepted standards with EN 10204 3.1 / 3.2 MTCs |
| Lower Manufacturing & Sourcing Costs | Save up to 15–20% compared to European suppliers |
| Favorable Exchange Rate Advantage | Reduced landed cost for international importers |
| In-House Testing & Inspection Facilities | Strict chemical, mechanical & dimensional quality checks |
| Bulk Stock & High Production Capacity | Fast order fulfillment and stable supply for large projects |
| Custom Sizes & Drawing-Based Manufacturing | Products manufactured exactly to buyer specifications |
| Export-Grade Packaging & Global Logistics | Sea-worthy packing, palletization & worldwide shipping support |
| Faster Global Shipping Routes | Optimized logistics for Middle East, Africa & Southeast Asia |
| Technical & After-Sales Support | Project assistance, documentation & responsive RFQ handling |
| Trusted by Global Steel & EPC Companies | Proven export experience across 50+ countries |
Features of Gunmetal Flat Bars
- ✔ Excellent corrosion resistance
- ✔ High wear resistance
- ✔ Superior machinability
- ✔ Good thermal conductivity
- ✔ Strong tensile strength
- ✔ Ideal for various industrial applications
Technical Overview of Gunmetal Flat Bars
| Product | Composition | Usage | Standards |
|---|---|---|---|
| Gunmetal Flat Bars | Copper (85%), Tin (5%), Zinc (5%), Lead (5%) | Used in marine applications, valves, and pump components. | ASTM B271, ASTM B584 |
| Gunmetal Flat Bars | Copper (85%), Tin (5%), Zinc (5%), Lead (5%) | Ideal for high corrosion resistance and strength. | BS 1400, ISO 4520 |
| Gunmetal Flat Bars | Copper (85%), Tin (5%), Zinc (5%), Lead (5%) | Commonly used in the manufacture of fittings and fixtures. | EN 1982, JIS H 5202 |
Specifications Table
| Material | Gunmetal |
|---|---|
| Grades | C93200, C83600 |
| Standard | ASTM B271, ASTM B271M |
| Size Range | 20 mm x 10 mm to 100 mm x 50 mm |
| Length | Up to 6 meters |
| Form | Flat Bars |
Available Grades Table
| Product | Composition | Applications |
|---|---|---|
| Gunmetal Grade LG2 | Copper: 85%, Tin: 5%, Zinc: 5%, Lead: 5% | Marine applications, valves, and fittings |
| Gunmetal Grade LG3 | Copper: 80%, Tin: 10%, Zinc: 5%, Lead: 5% | Pipes, pumps, and steam fittings |
| Gunmetal Grade LG4 | Copper: 75%, Tin: 12%, Zinc: 8%, Lead: 5% | Heavy-duty fittings and machinery components |
| Gunmetal Grade C83600 | Copper: 85%, Tin: 5%, Lead: 5%, Zinc: 5% | Waterworks valves and faucet components |
| Gunmetal Grade C84400 | Copper: 88%, Tin: 7%, Lead: 3%, Zinc: 2% | Marine hardware and engine parts |
Available Sizes of Gunmetal Flat Bars (MM)
| Size (MM) | Size (MM) |
|---|---|
| 10 x 5 | 50 x 10 |
| 15 x 5 | 60 x 15 |
| 20 x 5 | 70 x 20 |
| 25 x 5 | 80 x 25 |
| 30 x 5 | 100 x 20 |
| 40 x 10 | 120 x 30 |
| 50 x 10 | 150 x 40 |
| 60 x 15 | 200 x 50 |
| 75 x 20 | 250 x 50 |
| 100 x 25 | 300 x 75 |
Chemical Properties of Gunmetal Flat Bars
| Element | Composition (%) |
|---|---|
| Copper (Cu) | 80.0 - 90.0 |
| Lead (Pb) | 0.0 - 2.0 |
| Tin (Sn) | 5.0 - 10.0 |
| Zinc (Zn) | 0.0 - 1.0 |
| Iron (Fe) | 0.0 - 1.0 |
| Aluminum (Al) | 0.0 - 1.0 |
| Nickel (Ni) | 0.0 - 1.0 |
| Other Elements | Balance |
Mechanical Properties of Gunmetal Flat Bars
| Property | Value |
|---|---|
| Tensile Strength | 210-350 MPa |
| Yield Strength | 100-200 MPa |
| Elongation | 10-25% |
| Hardness (Brinell) | 70-120 HB |
| Impact Strength | 20-40 J |
Gunmetal Flat Bars – Physical & Thermal Properties
Density of Gunmetal Flat Bars
| Property | Metric | Imperial |
|---|---|---|
| Density | 8.5 g/cm³ | 0.308 lb/in³ |
Melting Point of Gunmetal Flat Bars
| Property | Metric | Imperial |
|---|---|---|
| Melting Point | 950 - 1050 °C | 1742 - 1922 °F |
Specific Heat of Gunmetal Flat Bars
| Specific Heat of Gunmetal Flat Bars | ||
|---|---|---|
| Specific Heat (J/kg·K) | Temperature Range (°C) | Condition |
| 380 | 20 - 100 | Solid |
| 400 | 100 - 300 | Solid |
| 420 | 300 - 600 | Solid |
Electrical Resistivity of Gunmetal Flat Bars
| Electrical Resistivity | ||
|---|---|---|
| Value (µΩ·m) | Temperature (°C) | Treatment or Condition |
| 60 | 20 | As Cast |
| 62 | 100 | |
| 64 | 200 | |
| 66 | 300 | |
| 68 | 400 | |
Equivalent of Gunmetal Flat Bars
| Standard | Werkstoff Nr. | UNS |
|---|---|---|
| ASTM B271 | CuSn10 | C93200 |
| BS 1400 | CC491K | C84400 |
Manufacturing Process & Heat Treatment of Gunmetal Flat Bars
Annealing
Annealing of gunmetal flat bars involves heating the material to a temperature range of 600-700°C and then allowing it to cool slowly in a furnace. This process helps to relieve internal stresses, enhance ductility, and improve the overall machinability of the bars, making them easier to work with in subsequent manufacturing processes.
Forging
The forging process for gunmetal flat bars is performed at temperatures between 700-800°C. The material is shaped using a hammer or press, which increases its strength through the deformation process. This method also helps to refine the grain structure, resulting in improved mechanical properties and surface finish.
Hardening & Tempering
| Process | Temperature Range (°C) | Quenching Medium | Purpose |
|---|---|---|---|
| Hardening | 800-900 | Water or Oil | To increase hardness and strength of the material. |
| Tempering | 300-500 | Air | To relieve stresses and reduce brittleness after hardening. |
| Final Treatment | 200-300 | Air | To achieve desired mechanical properties and surface finish. |
The combination of these manufacturing and heat treatment processes ensures that gunmetal flat bars meet the stringent requirements for durability and performance in various industrial applications.
Various Types
Standard Gunmetal Flat Bar
- Dimensions: 20mm x 5mm to 200mm x 20mm
- Condition: Hot Rolled
- Applications: Marine hardware, valve bodies, and fittings
Machined Gunmetal Flat Bar
- Dimensions: 30mm x 5mm to 150mm x 15mm
- Condition: Machined
- Applications: Precision components, bushings, and couplings
Anodized Gunmetal Flat Bar
- Dimensions: 10mm x 3mm to 100mm x 10mm
- Condition: Anodized
- Applications: Architectural elements, decorative pieces
Galvanized Gunmetal Flat Bar
- Dimensions: 25mm x 5mm to 200mm x 20mm
- Condition: Galvanized
- Applications: Construction, outdoor fixtures, and supports
Applications & Uses
- Oil & Gas Industry
- Petrochemical Plants
- Water Treatment Plants
- Pharmaceutical Industry
- Food & Beverage Industry
- Automobile Industry
Industries We Serve
Our alloys are widely used across:
- Steel Plants
- Foundries & Casting Units
- Automobile Industry
- Shipbuilding & Marine
- Oil & Gas
- Engineering Components
- Heavy Industrial Machinery
Latest Price List of Gunmetal Flat Bars
| Material Grade | Thickness | Price (USD / Kg) | Price (INR / Kg) |
|---|---|---|---|
| Gunmetal Flat Bars | 3 mm | $5.50 – $6.00 | ₹455 – ₹490 |
| Gunmetal Flat Bars | 6 mm | $5.00 – $5.50 | ₹410 – ₹455 |
| Gunmetal Flat Bars | 10 mm | $4.75 – $5.25 | ₹390 – ₹430 |
Note: Prices are indicative and may vary based on size, quantity, raw material cost, and delivery location. Contact us for the latest quotation for Gunmetal Flat Bars.
MOQ & Payment Terms
Minimum Order Quantity: 25–100 Kg depending on part size and grade.
Payment Terms: Depending On Grade and Quantity Size
Export Packaging & Shipping
- Seaworthy, fumigated wooden crates with waterproof inner lining
- Palletised packing with clear shipping marks and heat number identification
- Container stuffing supervision with loading photographs available on request
Cities We Suppllied In India
We exported to 50+ countries worldwide.
Our Certifications
We are a certified manufacturer and exporter, committed to strict quality control and international compliance standards. Below are our key certifications.
GST Certificate
ISO 9001:2015
ISO 1002:2018
Udyam MSME Registration
Quality Inspection & Testing
At Ragnar Metals and Tubes, all products are checked through strict quality inspection and testing to meet international standards such as ASTM, ASME, EN, and DIN. This ensures consistent quality, accurate dimensions, and full material traceability.
- ✔ Chemical composition testing
- ✔ Mechanical tests such as tensile and hardness
- ✔ Dimensional inspection as per standard tolerances
- ✔ PMI, ultrasonic, and visual inspection (if required)
- ✔ EN 10204 3.1 / 3.2 test certificates
- ✔ Third-party inspection by SGS, TUV, BV, or Lloyd’s
Our quality systems support reliable supply for oil & gas, petrochemical, power, marine, and heavy engineering projects.
Our Products Types
People Also Search For
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- Metal Flat Bar Suppliers
Frequently Asked Questions
About Ragnar Metals and Tubes
- ✔ Decades of experience in stainless steel, carbon steel, and alloy steel manufacturing
- ✔ ISO 9001:2015 certified company ensuring strict quality control standards
- ✔ Specialized in cold drawn pipes and tubes processing
- ✔ State-of-the-art manufacturing facilities with modern machinery
- ✔ Precision-engineered products with consistent quality and reliability
- ✔ Customized steel solutions as per client drawings and specifications
- ✔ Compliance with international industry standards
- ✔ Trusted supplier for critical industrial applications worldwide