AISI 4340 Forged Black Flat Bar exporter in Indonesia
AISI 4340 Forged Black Flat Bar exporter in Indonesia offers high-quality alloy steel products tailored for demanding industrial applications. Known for its exceptional strength, toughness, and resistance to fatigue, AISI 4340 is a nickel-chromium-molybdenum alloy steel widely used in manufacturing components that require superior mechanical properties. The forged black flat bar form ensures enhanced grain structure and durability, making it ideal for heavy-duty machining and structural uses.
The flat bars are precision-forged to meet stringent dimensional tolerances and surface finish requirements, providing consistent performance in critical applications. Typical specifications include a carbon content of approximately 0.38-0.43%, combined with alloying elements that elevate tensile strength and hardenability. The black finish, resulting from controlled oxidation, offers mild corrosion resistance and a clean surface ideal for subsequent fabrication or coating processes.
Industries such as aerospace, automotive, oil and gas, and heavy machinery rely heavily on these alloy steel bars for producing shafts, gears, crankshafts, and other high-stress components. Their ability to withstand high-impact loads and maintain structural integrity under cyclic stresses makes them indispensable in manufacturing parts where safety and reliability are paramount. Additionally, the flat bar geometry facilitates ease of machining and welding, expanding its versatility across various engineering projects.
Export readiness is a key advantage provided by suppliers in Indonesia, ensuring that the forged flat bars comply with international quality standards such as ASTM A29 or equivalent certifications. Packaging is optimized for long-distance shipping, protecting the material from environmental damage during transit. This reliability in supply chain management positions Indonesian exporters as trusted partners for global industrial buyers seeking robust alloy steel products.
With a focus on quality assurance, timely delivery, and competitive pricing, the availability of AISI 4340 forged black flat bars from Indonesia supports manufacturers in meeting tight production schedules and technical requirements. Buyers can expect comprehensive technical support and documentation, including mill test certificates and traceability reports, facilitating seamless integration into their manufacturing workflows.
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 Indonesia 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 Indonesia
- 2. How to Choose the Right Manufacturer
- 3.Comparison of AISI 4340 Forged Black Flat Bar exporter in Indonesia
- 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 Indonesia
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 Indonesia
| 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, making it ideal for heavy-duty applications
- ✔ Excellent fatigue resistance, ensuring durability over time
- ✔ Good weldability, allowing for easy fabrication and assembly
- ✔ Superior toughness, suitable for extreme service conditions
- ✔ Enhanced impact resistance, providing reliability in critical environments
- ✔ Versatile applications in aerospace, automotive, and industrial sectors
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: 1.50-1.80%, Mo: 0.20-0.30% | Used in high-strength applications including aerospace, automotive, and machinery components. | ASTM A29, ASTM A322, SAE J403 |
| 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: 1.50-1.80%, Mo: 0.20-0.30% | Ideal for heavy-duty applications requiring high toughness and strength. | ASTM A29, ASTM A322, SAE J403 |
| 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: 1.50-1.80%, Mo: 0.20-0.30% | Commonly used in the production of gears, shafts, and other high-stress components. | ASTM A29, ASTM A322, SAE J403 |
Specifications Table
| Material | AISI 4340 |
|---|---|
| Grades | 4340 |
| Standard | ASTM A829 |
| Size Range | 1 inch to 12 inches width |
| Length | Up to 20 feet |
| 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%, P: ≤0.035%, S: ≤0.040%, Cr: 0.70-0.90%, Ni: 1.65-2.00%, Mo: 0.20-0.35% | High-strength structural components, aerospace applications, automotive parts, and heavy machinery. |
| AISI 4340 Annealed Flat Bar | C: 0.38-0.43%, Mn: 0.60-0.90%, P: ≤0.035%, S: ≤0.040%, Cr: 0.70-0.90%, Ni: 1.65-2.00%, Mo: 0.20-0.35% | Tooling, fixtures, and parts requiring good toughness and fatigue resistance. |
| AISI 4340 Quenched and Tempered Flat Bar | C: 0.38-0.43%, Mn: 0.60-0.90%, P: ≤0.035%, S: ≤0.040%, Cr: 0.70-0.90%, Ni: 1.65-2.00%, Mo: 0.20-0.35% | Heavy-duty shafts, gears, and structural components subject to high stress. |
| AISI 4340 Cold Drawn Flat Bar | C: 0.38-0.43%, Mn: 0.60-0.90%, P: ≤0.035%, S: ≤0.040%, Cr: 0.70-0.90%, Ni: 1.65-2.00%, Mo: 0.20-0.35% | Precision parts, automotive components, and applications requiring tighter tolerances. |
| AISI 4340 Hot Rolled Flat Bar | C: 0.38-0.43%, Mn: 0.60-0.90%, P: ≤0.035%, S: ≤0.040%, Cr: 0.70-0.90%, Ni: 1.65-2.00%, Mo: 0.20-0.35% | General construction, machinery parts, and applications requiring good weldability. |
Available Sizes of AISI 4340 Forged Black Flat Bar (MM)
| Size (MM) | Size (MM) |
|---|---|
| 10 x 100 | 20 x 150 |
| 10 x 150 | 20 x 200 |
| 15 x 100 | 25 x 150 |
| 15 x 150 | 25 x 200 |
| 20 x 100 | 30 x 150 |
| 20 x 125 | 30 x 200 |
| 25 x 100 | 40 x 150 |
| 25 x 125 | 40 x 200 |
| 30 x 100 | 50 x 150 |
| 30 x 125 | 50 x 200 |
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 | 930 MPa |
| Yield Strength | 750 MPa |
| Elongation | 15% |
| Hardness (HB) | 248 |
| Modulus of Elasticity | 210 GPa |
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 - 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 - 400 | Heat Treated |
| 700 | 400 - 800 | High Temperature |
Electrical Resistivity of AISI 4340 Forged Black Flat Bar
| Electrical Resistivity | ||
|---|---|---|
| Value (µΩ·m) | Temperature (°C) | Treatment or Condition |
| 76 | 20 | As Forged |
| 78 | 100 | |
| 80 | 200 | |
| 82 | 300 | |
| 85 | 400 | |
Equivalent of AISI 4340 Forged Black Flat Bar
| Standard | Werkstoff Nr. | UNS |
|---|---|---|
| ASTM A829 | 34CrNiMo6 | G43400 |
| DIN 1.6582 | 34CrNiMo6 | G43400 |
Manufacturing Process & Heat Treatment of AISI 4340 Forged Black Flat Bar
Annealing
Annealing of AISI 4340 involves heating the material to a temperature of approximately 850-900°C, followed by a slow cooling process. This treatment aims to relieve internal stresses, improve machinability, and enhance ductility, making the steel easier to work with in subsequent manufacturing processes.
Forging
The forging process for AISI 4340 involves heating the steel to a temperature range of 1100-1200°C and then shaping it through mechanical deformation. This process improves the mechanical properties of the steel by refining its grain structure, resulting in enhanced strength and toughness.
Hardening & Tempering
| Process | Temperature Range (°C) | Quenching Medium | Purpose |
|---|---|---|---|
| Hardening | 850-900 | Oil | To increase hardness and strength by transforming austenite into martensite. |
| Tempering | 400-600 | Air | To reduce brittleness and relieve stresses after hardening. |
| Final Tempering | 300-400 | Air | To achieve desired mechanical properties and stabilize the microstructure. |
The combination of these processes ensures that AISI 4340 forged black flat bars meet the stringent requirements for high-performance applications in various industries, including automotive and aerospace.
Various Types
AISI 4340 Forged Black Flat Bar - Standard
- Width: 100 mm, Thickness: 20 mm, Length: 6 m
- Condition: Hot Rolled
- Applications: Automotive components, aerospace parts, heavy machinery
AISI 4340 Forged Black Flat Bar - Customized
- Width: 150 mm, Thickness: 25 mm, Length: 6 m
- Condition: Annealed
- Applications: Structural components, tooling, and dies
AISI 4340 Forged Black Flat Bar - High Strength
- Width: 200 mm, Thickness: 30 mm, Length: 6 m
- Condition: Quenched and Tempered
- Applications: High-load applications, military equipment
AISI 4340 Forged Black Flat Bar - Specialty
- Width: 80 mm, Thickness: 15 mm, Length: 6 m
- Condition: Stress Relieved
- Applications: Specialized machinery, custom applications
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 – $3.00 | ₹207 – ₹248 |
| AISI 4340 Forged Black Flat Bar | 6 mm | $2.70 – $3.20 | ₹224 – ₹265 |
| AISI 4340 Forged Black Flat Bar | 10 mm | $2.90 – $3.40 | ₹240 – ₹285 |
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 Supplier in Indonesia
- Forged Steel Flat Bar Manufacturers in Indonesia
- AISI 4340 Flat Bar Price in Indonesia
- High Strength Steel Exporter in Indonesia
- Alloy Steel Flat Bar Suppliers in Indonesia
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.