AISI 4340 Forged Black Flat Bar exporter in Australia
AISI 4340 Forged Black Flat Bar exporter in Australia specializes in supplying high-strength alloy steel flat bars known for their exceptional toughness and fatigue resistance. These bars are manufactured through a forging process, enhancing their mechanical properties and ensuring uniform grain structure, which is critical for demanding industrial applications. The black finish provides a protective layer against corrosion and surface wear, making the product suitable for various heavy-duty environments.
This grade of steel, AISI 4340, is a nickel-chromium-molybdenum alloy renowned for its excellent combination of strength, hardness, and ductility. The flat bars typically come in precise dimensions and are available in various thicknesses and widths to meet specific engineering requirements. Their superior tensile strength and impact resistance make them ideal for components subjected to high stress and shock loads.
Industries such as automotive, aerospace, construction, and heavy machinery extensively use these forged flat bars for manufacturing shafts, gears, fasteners, and structural parts. The materialβs ability to undergo heat treatment processes further enhances its versatility, allowing customization of mechanical properties to suit different operational conditions. This adaptability ensures that end-users receive components capable of maintaining performance under rigorous service conditions.
Export readiness is a key aspect of the supply chain when dealing with international buyers. Suppliers in Australia maintain strict quality control measures, including certifications and compliance with international standards such as ASTM and ISO. This guarantees that the alloy steel flat bars meet global industrial benchmarks, facilitating seamless integration into manufacturing processes worldwide. Efficient logistics and packaging methods ensure timely and safe delivery to various destinations.
For industrial buyers seeking reliable and high-performance alloy steel products, partnering with an experienced exporter based in Australia offers access to premium forged flat bars tailored for durability and precision. The combination of material excellence, manufacturing expertise, and export capabilities positions these suppliers as trusted sources in the global market.
Our Approvals | Third Party Inspection
Lead Time
2β7 weeks depending on size
Delivery Terms
FOB, CIF, DDP
Shipping Modes
Sea / Air / Express
Why AISI 4340 Forged Black Flat Bar exporter in Australia 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 AISI 4340 Forged Black Flat Bar exporter in Australia
- 2. How to Choose the Right Manufacturer
- 3.Comparison of AISI 4340 Forged Black Flat Bar exporter in Australia
- 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 Australia
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 Australia
| 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 AISI 4340 Forged Black Flat Bar
- β Excellent tensile strength and toughness
- β High fatigue resistance, ideal for heavy-duty applications
- β Good machinability for various manufacturing processes
- β Superior weldability with appropriate techniques
- β Available in various sizes and thicknesses to meet specific needs
- β Conforms to ASTM standards for quality assurance
Technical Overview of AISI 4340 Forged Black Flat Bar
| Product | Composition | Usage | Standards |
|---|---|---|---|
| AISI 4340 Forged Black Flat Bar | C: 0.38-0.43%, Mn: 0.60-0.90%, Si: 0.15-0.40%, Cr: 0.70-0.90%, Ni: 1.50-1.75%, Mo: 0.20-0.30% | Used in high-strength applications such as gears, crankshafts, and aircraft components. | ASTM A829, AMS 6349, SAE J404 |
| AISI 4340 Forged Black Flat Bar | C: 0.38-0.43%, Mn: 0.60-0.90%, Si: 0.15-0.40%, Cr: 0.70-0.90%, Ni: 1.50-1.75%, Mo: 0.20-0.30% | Commonly used in the manufacturing of heavy machinery and structural components. | ASTM A829, AMS 6349, SAE J404 |
| AISI 4340 Forged Black Flat Bar | C: 0.38-0.43%, Mn: 0.60-0.90%, Si: 0.15-0.40%, Cr: 0.70-0.90%, Ni: 1.50-1.75%, Mo: 0.20-0.30% | Ideal for applications requiring high fatigue strength and toughness. | ASTM A829, AMS 6349, SAE J404 |
Specifications Table
| Material | AISI 4340 |
|---|---|
| Grades | 4340 |
| Standard | ASTM A829 |
| Size Range | 25mm x 5mm to 150mm x 25mm |
| Length | Up to 6000mm |
| Form | Forged Black Flat Bar |
Available Grades Table
| Product | Composition | Applications |
|---|---|---|
| AISI 4340 Forged Black Flat Bar | C: 0.38-0.43%, Mn: 0.60-0.90%, Si: 0.15-0.40%, Cr: 0.70-0.90%, Mo: 0.15-0.25%, Ni: 1.65-2.00% | Used in high-stress applications such as gears, shafts, and heavy machinery components |
| AISI 4340 Hot Rolled Flat Bar | C: 0.38-0.43%, Mn: 0.60-0.90%, Si: 0.15-0.40%, Cr: 0.70-0.90%, Mo: 0.15-0.25%, Ni: 1.65-2.00% | Ideal for structural components and high-strength applications |
| AISI 4340 Steel Plate | C: 0.38-0.43%, Mn: 0.60-0.90%, Si: 0.15-0.40%, Cr: 0.70-0.90%, Mo: 0.15-0.25%, Ni: 1.65-2.00% | Applicable in automotive and aerospace sectors for manufacturing various components |
| AISI 4340 Round Bar | C: 0.38-0.43%, Mn: 0.60-0.90%, Si: 0.15-0.40%, Cr: 0.70-0.90%, Mo: 0.15-0.25%, Ni: 1.65-2.00% | Used in making high-strength bolts, fasteners, and various machinery components |
| AISI 4340 Forging | C: 0.38-0.43%, Mn: 0.60-0.90%, Si: 0.15-0.40%, Cr: 0.70-0.90%, Mo: 0.15-0.25%, Ni: 1.65-2.00% | Commonly used in the oil and gas industry for downhole drilling tools |
Available Sizes of AISI 4340 Forged Black Flat Bar (MM)
| Size (MM) | Size (MM) |
|---|---|
| 25 x 5 | 50 x 10 |
| 30 x 6 | 60 x 12 |
| 40 x 8 | 70 x 15 |
| 45 x 10 | 80 x 20 |
| 50 x 12 | 90 x 25 |
| 60 x 15 | 100 x 30 |
| 70 x 20 | 120 x 40 |
| 80 x 25 | 150 x 50 |
| 90 x 30 | 200 x 60 |
| 100 x 35 | 250 x 75 |
Chemical Properties of AISI 4340 Forged Black Flat Bar
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.38 - 0.43 |
| Manganese (Mn) | 0.60 - 0.90 |
| Silicon (Si) | 0.15 - 0.40 |
| Chromium (Cr) | 0.70 - 0.90 |
| Nickel (Ni) | 1.65 - 2.00 |
| Molybdenum (Mo) | 0.20 - 0.30 |
| Phosphorus (P) | 0.04 max |
| Sulfur (S) | 0.04 max |
Mechanical Properties of AISI 4340 Forged Black Flat Bar
| Property | Value |
|---|---|
| Tensile Strength (MPa) | 860 - 1080 |
| Yield Strength (MPa) | 590 - 750 |
| Elongation (% in 50 mm) | 12 - 20 |
| Reduction of Area (%) | 50 |
| Hardness (HB) | 250 - 350 |
AISI 4340 Forged Black Flat Bar β Physical & Thermal Properties
Density of AISI 4340 Forged Black Flat Bar
| Property | Metric | Imperial |
|---|---|---|
| Density | 7.85 g/cmΒ³ | 0.284 lb/inΒ³ |
Melting Point of AISI 4340 Forged Black Flat Bar
| Property | Metric | Imperial |
|---|---|---|
| Melting Point | 1425 - 1540 Β°C | 2600 - 2800 Β°F |
Specific Heat of AISI 4340 Forged Black Flat Bar
| Specific Heat of AISI 4340 Forged Black Flat Bar | ||
|---|---|---|
| Specific Heat (J/kgΒ·K) | Temperature Range (Β°C) | Condition |
| 500 | 20 - 100 | Room Temperature |
| 460 | 100 - 300 | Heating |
| 420 | 300 - 600 | High Temperature |
Electrical Resistivity of AISI 4340 Forged Black Flat Bar
| Electrical Resistivity | ||
|---|---|---|
| Value (¡Ω·m) | Temperature (°C) | Treatment or Condition |
| 70 | 20 | As Forged |
| 72 | 100 | |
| 74 | 200 | |
| 76 | 300 | |
| 78 | 400 | |
Equivalent of AISI 4340 Forged Black Flat Bar
| Standard | Werkstoff Nr. | UNS |
|---|---|---|
| ASTM A829 | 34CrNiMo6 | G43400 |
| EN 10083-3 | 42CrMo4 | 1.7228 |
Manufacturing Process & Heat Treatment of AISI 4340 Forged Black Flat Bar
Annealing
The annealing process for AISI 4340 involves heating the forged bars to a temperature of approximately 850-900Β°C and holding them at this temperature for a sufficient period to ensure uniform temperature throughout the material. This process helps to relieve internal stresses, improve ductility, and refine the microstructure, making the steel more workable for subsequent operations.
Forging
The forging of AISI 4340 is typically performed at temperatures ranging from 1100Β°C to 1250Β°C. This hot working process improves the mechanical properties of the steel by refining the grain structure, enhancing strength and toughness. The forged black flat bars are shaped and formed to meet specific dimensional requirements, followed by cooling to room temperature.
Hardening & Tempering
| Process | Temperature Range (Β°C) | Quenching Medium | Purpose |
|---|---|---|---|
| Hardening | 850-880 | Oil or Water | To increase hardness and strength by transforming austenite into martensite. |
| Tempering | 400-600 | Air | To reduce brittleness and relieve stresses after hardening, while retaining desired hardness. |
| Post-Tempering | 150-300 | Air | To further improve toughness and ductility, ensuring optimal performance in applications. |
The combination of these manufacturing and heat treatment processes ensures that AISI 4340 forged black flat bars possess excellent mechanical properties, making them suitable for high-stress applications in various industries.
Various Types
AISI 4340 Forged Black Flat Bar - Variant A
- Dimensions: 50mm x 10mm
- Condition: Hot Rolled
- Applications: Automotive components, Aerospace parts
AISI 4340 Forged Black Flat Bar - Variant B
- Dimensions: 75mm x 15mm
- Condition: Cold Drawn
- Applications: Machinery parts, Structural applications
AISI 4340 Forged Black Flat Bar - Variant C
- Dimensions: 100mm x 20mm
- Condition: Normalized
- Applications: Heavy-duty machinery, Oil and gas industry
AISI 4340 Forged Black Flat Bar - Variant D
- Dimensions: 150mm x 25mm
- Condition: Quenched and Tempered
- Applications: High-stress applications, Tool manufacturing
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 | $2.50 β $3.00 | βΉ207 β βΉ248 |
| AISI 4340 | 6 mm | $2.80 β $3.30 | βΉ232 β βΉ273 |
| AISI 4340 | 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 AISI 4340 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
- AISI 4340 Steel Properties
- Forged Steel Flat Bar Suppliers in Australia
- AISI 4340 Heat Treatment Process
- High Strength Steel Flat Bar Exporters
- AISI 4340 Applications in Engineering
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.