AISI 4340 Forged Black Flat Bar exporter in Brazil
AISI 4340 Forged Black Flat Bar exporter in Brazil offers high-quality alloy steel products known for their excellent strength and toughness. These flat bars are manufactured through a forging process, which enhances their mechanical properties and structural integrity. The black finish typically indicates a protective oxide layer that helps prevent surface corrosion during handling and transportation. This combination makes the product ideal for demanding industrial applications requiring durability and reliable performance.
The alloy composition of AISI 4340 includes nickel, chromium, and molybdenum, which contribute to its superior hardenability and wear resistance. The forged flat bars are available in various thicknesses and widths, meeting precise dimensional tolerances to suit custom engineering requirements. Their tensile strength and fatigue resistance make them suitable for heavy-duty components such as gears, shafts, and aerospace fasteners, where material reliability is critical.
Industries such as automotive manufacturing, heavy machinery, and defense rely heavily on this grade of alloy steel due to its capacity to withstand high stress and impact. The black flat bars are often used in fabrication processes involving machining, welding, and heat treatment, allowing for versatile application across multiple sectors. Their ability to maintain structural integrity under extreme conditions ensures long service life and reduced maintenance costs.
Exporters based in Brazil are well-equipped to handle international logistics, ensuring timely delivery and compliance with global quality standards like ASTM and SAE specifications. Packaging is designed to protect the forged bars during transit, minimizing the risk of damage. This export readiness, combined with competitive pricing and reliable supply chains, makes Brazilian suppliers a preferred choice for industrial buyers worldwide.
For engineers and procurement specialists seeking robust, precision-engineered flat bars, sourcing from a reputable Brazilian exporter guarantees access to premium AISI 4340 forged steel products. Their commitment to quality assurance and customer service supports seamless integration into complex manufacturing processes, enhancing overall operational efficiency and product performance.
Our Approvals | Third Party Inspection
Lead Time
2–7 weeks depending on size
Delivery Terms
FOB, CIF, DDP
Shipping Modes
Sea / Air / Express
Why AISI 4340 Forged Black Flat Bar exporter in Brazil 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: 500 MT / Month
- Export Experience: 50+ Years
- Countries Served: 50+
- Annual Export Volume: 5,500 MT
Table of Contents
- 1. What is AISI 4340 Forged Black Flat Bar exporter in Brazil
- 2. How to Choose the Right Manufacturer
- 3.Comparison of AISI 4340 Forged Black Flat Bar exporter in Brazil
- 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 AISI 4340 Forged Black Flat Bar exporter in Brazil
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 AISI 4340 Forged Black Flat Bar exporter in Brazil
| 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 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 AISI 4340 Forged Black Flat Bar
- ✔ High tensile strength for demanding applications
- ✔ Excellent toughness and ductility
- ✔ Superior fatigue resistance for enhanced durability
- ✔ Versatile in various industrial applications
- ✔ Easy to machine and weld
- ✔ Available in custom sizes and shapes
Technical Overview of AISI 4340 Forged Black Flat Bar
| Product | Composition | Usage | Standards |
|---|---|---|---|
| AISI 4340 Forged Black Flat Bar | Carbon (0.38-0.43%), Manganese (0.60-0.90%), Chromium (0.70-0.90%), Nickel (1.50-1.80%), Molybdenum (0.20-0.30%) | Used in high-stress applications, such as aerospace, automotive components, and heavy machinery | ASTM A829, SAE J403 |
| AISI 4340 Forged Black Flat Bar | Carbon (0.38-0.43%), Manganese (0.60-0.90%), Chromium (0.70-0.90%), Nickel (1.50-1.80%), Molybdenum (0.20-0.30%) | Ideal for manufacturing gears, shafts, and various structural components | ASTM A829, SAE J403 |
| AISI 4340 Forged Black Flat Bar | Carbon (0.38-0.43%), Manganese (0.60-0.90%), Chromium (0.70-0.90%), Nickel (1.50-1.80%), Molybdenum (0.20-0.30%) | Commonly used in applications requiring toughness and high fatigue resistance | ASTM A829, SAE J403 |
Specifications Table
| Material | AISI 4340 |
|---|---|
| Grades | 4340, 4340V |
| Standard | ASTM A829 |
| Size Range | 1.0" x 3.0" to 4.0" x 12.0" |
| Length | Up to 20 feet |
| Form | Forged Black Flat Bar |
Available Grades Table
| Product | Composition | Applications |
|---|---|---|
| AISI 4340 | Carbon: 0.38-0.43%, Manganese: 0.60-0.90%, Chromium: 0.70-0.90%, Nickel: 1.50-2.00%, Molybdenum: 0.20-0.30% | High-strength applications, gears, shafts, and heavy machinery components |
| AISI 4340 (QT) | Carbon: 0.38-0.43%, Manganese: 0.60-0.90%, Chromium: 0.70-0.90%, Nickel: 1.50-2.00%, Molybdenum: 0.20-0.30% | Heavy-duty parts, aerospace components, and automotive applications |
| AISI 4340 (Normalized) | Carbon: 0.38-0.43%, Manganese: 0.60-0.90%, Chromium: 0.70-0.90%, Nickel: 1.50-2.00%, Molybdenum: 0.20-0.30% | Improved toughness and ductility, structural components |
| AISI 4340 (Hardened) | Carbon: 0.38-0.43%, Manganese: 0.60-0.90%, Chromium: 0.70-0.90%, Nickel: 1.50-2.00%, Molybdenum: 0.20-0.30% | Components requiring high wear resistance and strength |
| AISI 4340 (Annealed) | Carbon: 0.38-0.43%, Manganese: 0.60-0.90%, Chromium: 0.70-0.90%, Nickel: 1.50-2.00%, Molybdenum: 0.20-0.30% | Ease of machining and further processing |
Available Sizes of AISI 4340 Forged Black Flat Bar (MM)
| Size (MM) | Size (MM) |
|---|---|
| 20 x 5 | 50 x 10 |
| 25 x 6 | 60 x 15 |
| 30 x 8 | 70 x 20 |
| 35 x 10 | 80 x 25 |
| 40 x 10 | 90 x 30 |
| 45 x 12 | 100 x 35 |
| 50 x 15 | 120 x 40 |
| 60 x 20 | 140 x 45 |
| 70 x 25 | 150 x 50 |
| 80 x 30 | 200 x 60 |
Chemical Properties of AISI 4340 Forged Black Flat Bar
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.38 - 0.43 |
| Manganese (Mn) | 0.60 - 0.90 |
| Phosphorus (P) | 0.035 max |
| Sulfur (S) | 0.040 max |
| Silicon (Si) | 0.15 - 0.40 |
| Nickel (Ni) | 1.65 - 2.00 |
| Chromium (Cr) | 0.70 - 0.90 |
| Molybdenum (Mo) | 0.15 - 0.25 |
Mechanical Properties of AISI 4340
| Property | Value |
|---|---|
| Tensile Strength | 745 MPa (108,000 psi) |
| Yield Strength | 655 MPa (95,000 psi) |
| Elongation | 16% |
| Reduction of Area | 50% |
| Hardness (Brinell) | 250 HB |
AISI 4340 Forged Black Flat Bar – Physical & Thermal Properties
Density of AISI 4340 Forged Black Flat Bar
| Property | Metric | Imperial |
|---|---|---|
| Density | 7.85 g/cm³ | 0.284 lb/in³ |
Melting Point of AISI 4340 Forged Black Flat Bar
| Property | Metric | Imperial |
|---|---|---|
| Melting Point | 1425 - 1470 °C | 2600 - 2700 °F |
Specific Heat of AISI 4340 Forged Black Flat Bar
| Specific Heat of AISI 4340 Forged Black Flat Bar | ||
|---|---|---|
| Specific Heat (J/kg·K) | Temperature Range (°C) | Condition |
| 500 | 20 - 100 | Room Temperature |
| 600 | 100 - 400 | Heating |
| 700 | 400 - 800 | High Temperature |
Electrical Resistivity of AISI 4340 Forged Black Flat Bar
| Electrical Resistivity | ||
|---|---|---|
| Value (µΩ·m) | Temperature (°C) | Treatment or Condition |
| 74.0 | 20 | Normalized |
| 76.5 | 100 | |
| 78.0 | 200 | |
| 79.5 | 300 | |
| 81.0 | 400 | |
Equivalent of AISI 4340 Forged Black Flat Bar
| Standard | Werkstoff Nr. | UNS |
|---|---|---|
| ASTM A29 | 34CrNiMo6 | G43400 |
| EN 10083-3 | 42CrMo4 | 1.7225 |
Manufacturing Process & Heat Treatment of AISI 4340 Forged Black Flat Bar
Annealing
The annealing process for AISI 4340 involves heating the material to a temperature range of 850-900°C, followed by air cooling. This process helps to relieve internal stresses, improve machinability, and enhance the ductility of the steel, making it more workable for subsequent processes.
Forging
Forging of AISI 4340 is typically performed hot, at temperatures ranging from 1100-1250°C. This process involves shaping the steel by applying compressive forces, which improves its mechanical properties through grain refinement and directional alignment, leading to enhanced strength and toughness.
Hardening & Tempering
| Process | Temperature Range (°C) | Quenching Medium | Purpose |
|---|---|---|---|
| Hardening | 820-860 | Oil | Increase hardness and strength |
| Tempering | 500-600 | Air | Reduce brittleness and improve toughness |
| Tempering | 200-300 | Air | Further refine mechanical properties |
The combination of these processes ensures that AISI 4340 forged black flat bars are produced with optimal mechanical properties suitable for demanding applications in various industries.
Various Types
AISI 4340 Forged Black Flat Bar - Standard
- Dimensions: 50mm x 10mm to 100mm x 20mm
- Condition: Hot Rolled
- Applications: Automotive components, gears, and axles
AISI 4340 Forged Black Flat Bar - Premium
- Dimensions: 100mm x 20mm to 200mm x 30mm
- Condition: Quenched and Tempered
- Applications: High-strength structural applications
AISI 4340 Forged Black Flat Bar - Custom
- Dimensions: Custom sizes available upon request
- Condition: Annealed or as specified
- Applications: Machinery parts, tooling, and fixtures
AISI 4340 Forged Black Flat Bar - Heavy Duty
- Dimensions: 150mm x 25mm to 300mm x 40mm
- Condition: Normalized
- Applications: Heavy machinery and construction equipment
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 AISI 4340 Forged Black Flat Bar
| Material Grade | Thickness | Price (USD / Kg) | Price (INR / Kg) |
|---|---|---|---|
| AISI 4340 | 3 mm | $5.00 – $5.50 | ₹415 – ₹456 |
| AISI 4340 | 6 mm | $4.80 – $5.30 | ₹398 – ₹440 |
| AISI 4340 | 10 mm | $4.60 – $5.10 | ₹380 – ₹425 |
Note: Prices are indicative and may vary based on size, quantity, raw material cost, and delivery location. Contact us for the latest quotation for AISI 4340 Forged Black Flat Bar.
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
| 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.
- ✔ 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.
People Also Search For
- AISI 4140 Forged Black Flat Bar exporter in Brazil
- AISI 1045 Steel Flat Bar suppliers in Brazil
- AISI 8620 Forged Flat Bar manufacturers in Brazil
- AISI 4130 Steel Flat Bar exporters in Brazil
- AISI 5160 Forged Flat Bar suppliers in Brazil
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.
- ✔ 50+ years of industry experience in alloy steel and round bar manufacturing
- ✔ Specialized in 4140, EN19, and 42CrMo4 high-performance round bars
- ✔ ISO certified and TUV approved quality standards
- ✔ Strict quality testing including ultrasonic and chemical analysis
- ✔ Premium raw material sourcing from SAIL and JSW
- ✔ Advanced manufacturing infrastructure with modern machinery
- ✔ Custom-engineered solutions as per drawings and specifications
- ✔ Global export capability with reliable delivery
- ✔ 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.