4140 Forged Black Flat Bar in Hubli
4140 Forged Black Flat Bar in Hubli is a high-strength alloy steel product known for its excellent toughness, wear resistance, and fatigue strength. Manufactured through a forging process, this flat bar offers superior mechanical properties compared to standard hot-rolled bars, making it ideal for demanding industrial applications. The black finish indicates a protective oxide layer that helps reduce surface corrosion, enhancing durability without the need for additional coatings.
These bars are typically produced from 4140 grade alloy steel, which contains chromium, molybdenum, and manganese, contributing to its outstanding hardness and tensile strength. The flat bar's dimensions are precisely controlled to meet stringent industry standards, ensuring uniform thickness and width essential for precision engineering tasks. Its forged nature guarantees a refined grain structure, resulting in improved impact resistance and machinability.
Widely used in sectors such as automotive, heavy machinery, construction, and tool manufacturing, these alloy steel flat bars serve as critical components in shafts, gears, bolts, and structural parts. Their ability to withstand high-stress environments makes them suitable for applications requiring both strength and resilience. Additionally, the flat barβs versatility allows for customization in size and heat treatment to meet specific project requirements.
Suppliers in Hubli are equipped to provide export-ready products that comply with international quality certifications, facilitating seamless shipment and delivery worldwide. These bars are typically packaged to prevent damage during transit and accompanied by detailed mill test reports to verify chemical composition and mechanical properties. This ensures industrial buyers receive reliable materials that adhere to global standards.
For industrial buyers seeking robust, high-performance alloy steel flat bars, these forged black variants offer a dependable solution tailored for heavy-duty applications. Their combination of strength, durability, and export compliance makes them a preferred choice for manufacturers and fabricators aiming for long-term operational efficiency.
Our Approvals | Third Party Inspection
Lead Time
2β7 weeks depending on size
Delivery Terms
FOB, CIF, DDP
Shipping Modes
Sea / Air / Express
Why 4140 Forged Black Flat Bar in Hubli Are Preferred by Global Buyers
- β Factory Pricing: Direct manufacturer rates with bulk stock
- β Certified Quality: ISO & 3rd-party tested, EN 10204 certified
- β Export-Ready: Sea-worthy packaging for on-time delivery
- β Fast RFQs: Quick quotes for custom sizes & quantities
- β 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: 500 MT / Month
- Export Experience: 50+ Years
- Countries Served: 50+
- Annual Export Volume: 5,500 MT
Table of Contents
- 1. What is 4140 Forged Black Flat Bar in Hubli
- 2. How to Choose the Right Manufacturer
- 3.Comparison of 4140 Forged Black Flat Bar in Hubli
- 4. Why Global Buyers Source from Super Metal Manufacturing Co.
- 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 Super Metal Manufacturing Co.
How to Choose the Right 4140 Forged Black Flat Bar in Hubli
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 4140 Forged Black Flat Bar in Hubli
| 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 Super Metal Manufacturing Co.
Super Metal Manufacturing Co. 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 15β20% 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 4140 Forged Black Flat Bar
- β High tensile strength for demanding applications
- β Excellent wear resistance, ideal for heavy-duty use
- β Versatile for various industrial applications and fabrication
- β Enhanced machinability for ease of processing
- β Available in multiple sizes for customized solutions
- β Conforms to industry standards for quality assurance
Technical Overview of 4140 Forged Black Flat Bar
| Product | Composition | Usage | Standards |
|---|---|---|---|
| 4140 Forged Black Flat Bar | 0.38-0.43% Carbon, 0.75-1.00% Manganese, 0.15-0.25% Silicon, 0.80-1.10% Chromium, 0.15-0.30% Molybdenum | Used in manufacturing high-strength components like gears, axles, and shafts | AISI 4140, ASTM A829, ASTM A36 |
| 4140 Forged Black Flat Bar | 0.38-0.43% Carbon, 0.75-1.00% Manganese, 0.15-0.25% Silicon, 0.80-1.10% Chromium, 0.15-0.30% Molybdenum | Ideal for applications requiring good wear resistance and toughness | SAE J403, ASTM A572 |
| 4140 Forged Black Flat Bar | 0.38-0.43% Carbon, 0.75-1.00% Manganese, 0.15-0.25% Silicon, 0.80-1.10% Chromium, 0.15-0.30% Molybdenum | Commonly used in oil and gas, automotive, and construction industries | API 5L, ISO 9001 |
Specifications Table
| Material | 4140 Forged Steel |
|---|---|
| Grades | AISI 4140 |
| Standard | ASTM A829 |
| Size Range | 1" to 10" Width, 0.25" to 2" Thickness |
| Length | Custom lengths available up to 20 feet |
| Form | Flat Bar |
Available Grades Table
| Product | Composition | Applications |
|---|---|---|
| 4140 Forged Black Flat Bar | Carbon: 0.38-0.43%, Manganese: 0.75-1.00%, Chromium: 0.80-1.10%, Molybdenum: 0.15-0.25% | Suitable for manufacturing gears, axles, and other high-strength components. |
| 4140 HT Forged Black Flat Bar | Carbon: 0.38-0.43%, Manganese: 0.75-1.00%, Chromium: 0.80-1.10%, Molybdenum: 0.15-0.25% | Used in heavy-duty machinery and structural applications requiring high hardness. |
| 4140 Pre-Hardened Forged Black Flat Bar | Carbon: 0.38-0.43%, Manganese: 0.75-1.00%, Chromium: 0.80-1.10%, Molybdenum: 0.15-0.25% | Ideal for applications needing improved machinability and hardness. |
| 4140 Alloy Forged Black Flat Bar | Carbon: 0.38-0.43%, Manganese: 0.75-1.00%, Chromium: 0.80-1.10%, Molybdenum: 0.15-0.25% | Common in automotive and aerospace industries for high-strength parts. |
| 4140 Quenched & Tempered Forged Black Flat Bar | Carbon: 0.38-0.43%, Manganese: 0.75-1.00%, Chromium: 0.80-1.10%, Molybdenum: 0.15-0.25% | Suitable for heavy loads and high-stress applications. |
Available Sizes of 4140 Forged Black Flat Bar (MM)
| Size (MM) | Size (MM) |
|---|---|
| 20 | 40 |
| 25 | 45 |
| 30 | 50 |
| 35 | 55 |
| 38 | 60 |
| 45 | 70 |
| 50 | 75 |
| 60 | 80 |
| 70 | 100 |
| 80 | 120 |
Chemical Properties of 4140 Forged Black Flat Bar
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.38 - 0.43 |
| Manganese (Mn) | 0.75 - 1.00 |
| Silicon (Si) | 0.15 - 0.40 |
| Chromium (Cr) | 0.80 - 1.10 |
| Molybdenum (Mo) | 0.15 - 0.25 |
| Phosphorus (P) | Max 0.04 |
| Sulfur (S) | Max 0.04 |
| Iron (Fe) | Balance |
Mechanical Properties of 4140 Forged Black Flat Bar
| Property | Value |
|---|---|
| Tensile Strength | 655 MPa |
| Yield Strength | 415 MPa |
| Elongation | 21% |
| Hardness (Brinell) | 207 HB |
| Impact Toughness | 50 J |
4140 Forged Black Flat Bar β Physical & Thermal Properties
Density of 4140 Forged Black Flat Bar
| Property | Metric | Imperial |
|---|---|---|
| Density | 7.85 g/cmΒ³ | 0.284 lb/inΒ³ |
Melting Point of 4140 Forged Black Flat Bar
| Property | Metric | Imperial |
|---|---|---|
| Melting Point | 1420 - 1540 Β°C | 2600 - 2800 Β°F |
Specific Heat of 4140 Forged Black Flat Bar
| Specific Heat of 4140 Forged Black Flat Bar | ||
|---|---|---|
| Specific Heat (J/kgΒ·K) | Temperature Range (Β°C) | Condition |
| 460 | 20 - 100 | Annealed |
| 420 | 100 - 300 | Quenched |
| 390 | 300 - 500 | Tempered |
Electrical Resistivity of 4140 Forged Black Flat Bar in Hubli
| Electrical Resistivity | ||
|---|---|---|
| Value (¡Ω·m) | Temperature (°C) | Treatment or Condition |
| 75 | 20 | As-Forged |
| 80 | 100 | |
| 85 | 200 | |
| 90 | 300 | |
| 95 | 400 | |
Equivalent of 4140 Forged Black Flat Bar in Hubli
| Standard | Werkstoff Nr. | UNS |
|---|---|---|
| ASTM A829 | 41Cr4 | G41400 |
| SAE J403 | 4140 | G41400 |
Manufacturing Process & Heat Treatment of 4140 Forged Black Flat Bar
Annealing
The annealing process for 4140 forged black flat bars involves heating the material to a temperature of approximately 850-900Β°C, followed by a slow cooling process. This treatment is designed to reduce hardness, relieve internal stresses, and improve machinability, resulting in a more uniform microstructure.
Forging
Forging of 4140 steel is performed at high temperatures ranging from 1150Β°C to 1250Β°C. The process involves shaping the steel using compressive forces, which enhances its strength and toughness. The forged flat bars are then allowed to cool gradually to room temperature, maintaining the desired mechanical properties.
Hardening & Tempering
| Process | Temperature Range (Β°C) | Quenching Medium | Purpose |
|---|---|---|---|
| Hardening | 850-900 | Oil or Water | Increase hardness and strength |
| Tempering | 400-700 | Air | Reduce brittleness and enhance toughness |
| Stress Relieving | 600-650 | Air | Eliminate internal stresses |
The combination of these processes ensures that 4140 forged black flat bars achieve optimal mechanical properties suitable for a wide range of industrial applications.
Various Types
4140 Forged Black Flat Bar - 1 Inch
- 1" x 4" x 12'
- Hot Rolled
- Machinery, Structural Components
4140 Forged Black Flat Bar - 2 Inch
- 2" x 4" x 12'
- Hot Rolled
- Heavy Equipment, Tooling
4140 Forged Black Flat Bar - 3 Inch
- 3" x 4" x 12'
- Hot Rolled
- Aerospace, Automotive Manufacturing
4140 Forged Black Flat Bar - 4 Inch
- 4" x 4" x 12'
- Hot Rolled
- Construction, Support Structures
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 4140 Forged Black Flat Bar
| Material Grade | Thickness | Price (USD / Kg) | Price (INR / Kg) |
|---|---|---|---|
| 4140 Forged Black Flat Bar | 3 mm | $2.50 β $2.80 | βΉ207 β βΉ232 |
| 4140 Forged Black Flat Bar | 6 mm | $2.70 β $3.00 | βΉ224 β βΉ248 |
| 4140 Forged Black Flat Bar | 10 mm | $3.00 β $3.50 | βΉ248 β βΉ290 |
Note: Prices are indicative and may vary based on size, quantity, raw material cost, and delivery location. Contact us for the latest quotation for 4140 Forged Black Flat Bar.
MOQ & Payment Terms
Minimum Order Quantity: 25β100 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
| Supply Cities | |||||
|---|---|---|---|---|---|
| Mumbai | Delhi | Pune | Chennai | Hyderabad | Bengaluru |
| Ahmedabad | Rajkot | Coimbatore | Kolkata | Bhopal | Surat |
We exported to 50+ countries worldwide.
| Exported Countries | |||||
|---|---|---|---|---|---|
| USA | UK | UAE | Germany | South Africa | Australia |
| Italy | Canada | Netherlands | Qatar | Saudi Arabia | Malaysia |
Our Certifications
We are a certified manufacturer and exporter, committed to strict quality control and international compliance standards.
Quality Inspection & Testing
At Super Metal Manufacturing Co., 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.
- β Chemical composition testing
- β Mechanical tests such as tensile and hardness
- β Dimensional inspection as per standard tolerances
- β PMI, ultrasonic, and visual inspection (if required)
- β EN 10204 3.1 / 3.2 test certificates
- β Third-party inspection by SGS, TUV, BV, or Lloydβs
Our quality systems support reliable supply for oil & gas, petrochemical, power, marine, and heavy engineering projects.
People Also Search For
- 4140 Steel Round Bar in Hubli
- Alloy Steel Flat Bar Suppliers in Hubli
- Forged Steel Products in Hubli
- 4140 Steel Plate in Hubli
- Black Steel Flat Bar Manufacturers in Hubli
Frequently Asked Questions
About Super Metal Manufacturing Co.
Super Metal Manufacturing Co. is a trusted name in the metal industry since 1965, specializing in the manufacturing and export of high-quality 4140, EN19, and 42CrMo4 round bars. With decades of experience, we have built a strong reputation for delivering precision-engineered, durable, and high-performance steel products to industries worldwide.
Our company is committed to excellence through a robust quality management system and strict quality control at every stage of production. From sourcing premium raw materials from reputed suppliers like SAIL and JSW to final delivery, every product undergoes rigorous testing including tensile testing, bend and rebend tests, chemical analysis, and ultrasonic testing to ensure superior performance and reliability.
We are accredited with ISO 9001 certification and are TUV certified, reflecting our commitment to international quality standards. Our state-of-the-art manufacturing facilities, advanced machinery, and skilled workforce enable us to deliver customized solutions tailored to client requirements.
- β 50+ years of industry experience in alloy steel and round bar manufacturing
- β Specialized in 4140, EN19, and 42CrMo4 high-performance round bars
- β ISO certified and TUV approved quality standards
- β Strict quality testing including ultrasonic and chemical analysis
- β Premium raw material sourcing from SAIL and JSW
- β Advanced manufacturing infrastructure with modern machinery
- β Custom-engineered solutions as per drawings and specifications
- β Global export capability with reliable delivery
- β Trusted by industries for critical and high-performance applications
Our Mission
Our mission is to deliver the highest-quality alloy steel round bars while maintaining excellence in precision, innovation, and customer satisfaction. We aim to empower industries worldwide by providing reliable and durable products that meet evolving manufacturing needs.
Our Vision
Our vision is to become a global leader in the manufacturing and export of premium-quality round bars, recognized for our product excellence, innovation, and commitment to exceeding customer expectations.