AISI 4340 Forged Black Flat Bar exporter in Thailand
AISI 4340 Forged Black Flat Bar exporter in Thailand offers high-quality alloy steel products tailored for demanding industrial applications. Known for its exceptional strength, toughness, and fatigue resistance, AISI 4340 is a nickel-chromium-molybdenum alloy steel that is commonly used in heavy-duty manufacturing sectors. The forged flat bars, produced through a controlled forging process, ensure superior grain structure and mechanical properties, making them ideal for critical components requiring durability and reliability.
The black finish on these flat bars provides a protective oxide layer, enhancing corrosion resistance and surface hardness. Typical dimensions and tolerances are maintained strictly to meet international standards, ensuring compatibility with various machining and fabrication processes. Mechanical properties such as tensile strength, yield strength, and elongation are carefully tested to comply with ASTM specifications, providing confidence in performance for structural and mechanical parts.
Industries such as automotive, aerospace, heavy machinery, and oil and gas rely heavily on these forged alloy steel flat bars for manufacturing gears, shafts, fasteners, and heavy-duty structural components. Their ability to withstand high stress and impact loads makes them particularly suitable for applications involving dynamic and cyclic loading environments. Additionally, heat treatment options further enhance the mechanical attributes, allowing customization based on specific engineering requirements.
As an established exporter in Thailand, the supply chain is optimized for timely delivery and compliance with international shipping regulations. The export readiness includes proper certification, quality assurance documentation, and packaging designed to preserve material integrity during transit. Buyers can expect seamless logistics support and competitive pricing, backed by technical expertise and customer service that caters to global industrial needs.
Choosing a reliable supplier of forged AISI 4340 black flat bars ensures access to premium materials that contribute to the longevity and efficiency of industrial equipment. With a focus on quality, precision, and export excellence, Thailand-based manufacturers and exporters remain a preferred source for alloy steel flat bars worldwide.
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 Thailand 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 Thailand
- 2. How to Choose the Right Manufacturer
- 3.Comparison of AISI 4340 Forged Black Flat Bar exporter in Thailand
- 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 Thailand
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 Thailand
| 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 impact resistance
- ✔ Good weldability with proper preheating
- ✔ Versatile for various engineering applications
- ✔ Heat treatable for improved mechanical properties
- ✔ Consistent quality due to forged manufacturing process
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: 1.65-2.00%, Molybdenum: 0.15-0.25% | Used in high-strength applications such as automotive components, aerospace, and heavy machinery. | ASTM A29, ASTM A304, SAE J403 |
| AISI 4340 Forged Black Flat Bar | Carbon: 0.38-0.43%, Manganese: 0.60-0.90%, Chromium: 0.70-0.90%, Nickel: 1.65-2.00%, Molybdenum: 0.15-0.25% | Ideal for manufacturing gears, shafts, and other structural components requiring high tensile strength. | ASTM A29, ASTM A304, SAE J403 |
| AISI 4340 Forged Black Flat Bar | Carbon: 0.38-0.43%, Manganese: 0.60-0.90%, Chromium: 0.70-0.90%, Nickel: 1.65-2.00%, Molybdenum: 0.15-0.25% | Commonly used in the production of aircraft landing gear and other critical applications. | ASTM A29, ASTM A304, SAE J403 |
Specifications Table
| Material | AISI 4340 |
|---|---|
| Grades | 4340 |
| Standard | ASTM A829 |
| Size Range | 20 mm to 200 mm width, 5 mm to 50 mm thickness |
| Length | Up to 6 meters |
| Form | Forged Black Flat Bar |
Available Grades Table
| Product | Composition | Applications |
|---|---|---|
| AISI 4340 Forged Black Flat Bar | Carbon: 0.38-0.43%, Chromium: 0.70-0.90%, Nickel: 1.65-2.00%, Molybdenum: 0.15-0.25% | Used in high-stress applications, aerospace components, crankshafts, and gears. |
| AISI 4340 Normalized Forged Black Flat Bar | Carbon: 0.38-0.43%, Chromium: 0.70-0.90%, Nickel: 1.65-2.00%, Molybdenum: 0.15-0.25% | Suitable for structural components, automotive parts, and heavy machinery. |
| AISI 4340 Heat-Treated Forged Black Flat Bar | Carbon: 0.38-0.43%, Chromium: 0.70-0.90%, Nickel: 1.65-2.00%, Molybdenum: 0.15-0.25% | Ideal for high-performance applications, such as aircraft landing gear and military vehicles. |
| AISI 4340 Quenched and Tempered Forged Black Flat Bar | Carbon: 0.38-0.43%, Chromium: 0.70-0.90%, Nickel: 1.65-2.00%, Molybdenum: 0.15-0.25% | Recommended for applications requiring improved toughness and fatigue resistance. |
| AISI 4340 Forged Black Flat Bar with Enhanced Mechanical Properties | Carbon: 0.38-0.43%, Chromium: 0.70-0.90%, Nickel: 1.65-2.00%, Molybdenum: 0.15-0.25% | Used in demanding environments in the oil and gas industry and heavy machinery. |
Available Sizes of AISI 4340 Forged Black Flat Bar (MM)
| Size (MM) | Size (MM) |
|---|---|
| 20 x 5 | 50 x 12 |
| 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 | 150 x 50 |
| 75 x 30 | 200 x 60 |
| 100 x 40 | 250 x 70 |
Chemical Properties of AISI 4340
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.38 - 0.43 |
| Manganese (Mn) | 0.60 - 0.90 |
| Phosphorus (P) | ≤ 0.035 |
| Sulfur (S) | ≤ 0.040 |
| Silicon (Si) | 0.15 - 0.40 |
| Nickel (Ni) | 1.65 - 2.00 |
| Chromium (Cr) | 0.70 - 0.90 |
| Molybdenum (Mo) | 0.20 - 0.30 |
Mechanical Properties of AISI 4340
| Property | Value |
|---|---|
| Tensile Strength | 980 MPa (142 ksi) |
| Yield Strength | 795 MPa (115 ksi) |
| Elongation | 15% |
| Reduction of Area | 50% |
| Hardness (HB) | 250 - 300 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 | 1420 - 1540 °C | 2600 - 2800 °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 | 25 - 100 | Room Temperature |
| 600 | 100 - 500 | Heating |
| 700 | 500 - 900 | High Temperature |
Electrical Resistivity of AISI 4340 Forged Black Flat Bar
| Electrical Resistivity | ||
|---|---|---|
| Value (µΩ·m) | Temperature (°C) | Treatment or Condition |
| 75 | 20 | As Forged |
| 80 | 100 | |
| 85 | 200 | |
| 90 | 300 | |
| 95 | 400 | |
Equivalent of AISI 4340 Forged Black Flat Bar
| Standard | Werkstoff Nr. | UNS |
|---|---|---|
| ASTM A29 | 1.6563 | G43400 |
| EN 10083-3 | 34CrNiMo6 | G43400 |
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 a slow cooling process. This treatment is designed to relieve internal stresses, improve the machinability, and refine the microstructure, leading to enhanced ductility and toughness.
Forging
Forging of AISI 4340 is typically conducted at temperatures ranging from 1100-1250°C. The process involves shaping the steel through compressive forces, which improves its mechanical properties by refining the grain structure. This results in a stronger and more durable flat bar suitable for various industrial applications.
Hardening & Tempering
| Process | Temperature Range (°C) | Quenching Medium | Purpose |
|---|---|---|---|
| Hardening | 800-850 | Oil | To increase hardness and strength |
| Tempering | 500-650 | Air | To reduce brittleness and improve toughness |
| Stress Relieving | 400-600 | Air | To relieve residual stresses from the manufacturing process |
The combination of these processes ensures that AISI 4340 forged black flat bars meet the high standards required for demanding applications in various industries, providing an optimal balance of strength, toughness, and wear resistance.
Various Types
AISI 4340 Forged Black Flat Bar - Standard
- Width: 50mm, Thickness: 10mm, Length: 6m
- Condition: Hot Rolled
- Applications: Automotive components, Aerospace parts
AISI 4340 Forged Black Flat Bar - Heavy Duty
- Width: 100mm, Thickness: 20mm, Length: 6m
- Condition: Quenched and Tempered
- Applications: Machinery parts, Heavy-duty structures
AISI 4340 Forged Black Flat Bar - Custom Size
- Width: 75mm, Thickness: 15mm, Length: 3m
- Condition: Normalized
- Applications: Custom fabrication, Structural applications
AISI 4340 Forged Black Flat Bar - High Strength
- Width: 50mm, Thickness: 20mm, Length: 6m
- Condition: Heat Treated
- Applications: High-stress applications, Aircraft components
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 Forged Black Flat Bar | 3 mm | $2.50 – $2.80 | ₹207 – ₹232 |
| AISI 4340 Forged Black Flat Bar | 6 mm | $2.40 – $2.70 | ₹199 – ₹224 |
| AISI 4340 Forged Black Flat Bar | 10 mm | $2.30 – $2.60 | ₹192 – ₹217 |
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 4340 Steel Properties
- Forged Steel Flat Bar Suppliers in Thailand
- AISI 4340 Flat Bar Price in Thailand
- Heat Treatment of AISI 4340 Steel
- Applications of AISI 4340 Forged Steel
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.