Home > Forged Bars > Carbon Steel Forged Bars
Grades: ASTM A105, ASTM A350 LF2, C45
Inox Steel India is a trusted manufacturer, supplier, and exporter of Carbon Steel Forged Bars, offering high-integrity forged solutions in ASTM A105, ASTM A350 LF2, and C45 grades for demanding industrial applications across India, GCC, Middle East, Africa, Europe, and North & South America.
Carbon steel forged bars are specifically engineered for high-load, pressure-bearing, and safety-critical components, where internal soundness, directional grain flow, and mechanical reliability are essential. Compared to rolled or cast products, forging delivers superior strength, improved fatigue resistance, and consistent performance under cyclic stress and pressure.
At Inox Steel India, forged bars are produced using controlled hot-forging processes, followed by normalizing or quench & temper heat treatment, ensuring uniform metallurgical properties and compliance with ASTM, ASME, EN, and DIN standards.
🔧 What Are Carbon Steel Forged Bars?
Carbon steel forged bars are solid metal sections manufactured by hot deformation of carbon steel billets under compressive force. This process realigns and refines the internal grain structure, eliminating porosity and improving directional strength along the load path.
Unlike hot-rolled bars, forged bars provide:
These characteristics make carbon steel forged bars the preferred raw material for pressure vessels, valves, flanges, shafts, gears, and heavy mechanical components.
⚙️ Manufacturing Process Followed at Inox Steel India
1️⃣ Billet Selection
High-quality carbon steel billets conforming to ASTM A105, A350 LF2, or EN C45 chemistry are selected for forging.
2️⃣ Hot Forging
Billets are heated to controlled temperatures and forged using open-die or closed-die forging, ensuring proper grain flow and dimensional integrity.
3️⃣ Heat Treatment
4️⃣ Rough Machining (Optional)
Forged bars can be supplied with rough-machined surfaces for faster downstream CNC operations.
5️⃣ Inspection & Testing
Each forged bar undergoes UT, MPI, mechanical testing, and dimensional checks to ensure defect-free material.
⭐ Key Advantages of Carbon Steel Forged Bars
✔ Superior mechanical strength compared to hot-rolled bars
✔ Excellent load-bearing and pressure-handling capability
✔ Directional grain flow improves fatigue and impact resistance
✔ Reliable performance in high-temperature and low-temperature service
✔ Better machinability for shafts, flanges, and precision components
✔ Long service life with reduced risk of internal failure
MASTER TECHNICAL DATASHEET – CARBON STEEL FORGED BARS
Grades: ASTM A105 · ASTM A350 LF2 · C45 | Inox Steel India
| Parameter | ASTM A105 Forged Bars | ASTM A350 LF2 Forged Bars | C45 Forged Bars |
|---|---|---|---|
| Material Type | Carbon Steel | Low-Temperature Carbon Steel | Medium Carbon Steel |
| Standard / Specification | ASTM A105 / ASME SA105 | ASTM A350 LF2 | EN 10083 / DIN 1.0503 |
| Product Form | Forged Bars | Forged Bars | Forged Bars |
| Forging Process | Open Die / Closed Die Forging | Open Die / Closed Die Forging | Hot Forging |
| Supply Condition | As Forged / Normalized / Rough Machined | Normalized / Quenched & Tempered | Normalized / QT |
| Diameter Range | 50 mm – 800 mm | 50 mm – 900 mm | 40 mm – 700 mm |
| Length | Random / Cut Lengths | Random / Cut Lengths | Random / Cut Lengths |
| Yield Strength (MPa) | ≥ 250 MPa | ≥ 275 MPa | ≥ 355 MPa |
| Tensile Strength (MPa) | 485 – 655 MPa | 485 – 655 MPa | 570 – 700 MPa |
| Elongation (%) | ≥ 22% | ≥ 22% | ≥ 16% |
| Impact Testing | Optional | Mandatory (Low-Temperature) | Optional |
| Service Temperature | Up to 425 °C | Down to –46 °C | Up to 400 °C |
| Machinability | Good | Good | Excellent |
| Heat Treatment Options | Normalizing | Normalizing / QT | Normalizing / QT |
| Testing Performed | UT, MPI, Mechanical | UT, MPI, Impact, Mechanical | UT, Mechanical |
| Inspection Standard | ASTM / ASME | ASTM / ASME | EN / DIN |
| Certification | EN 10204 3.1 / 3.2 | EN 10204 3.1 / 3.2 | EN 10204 3.1 |
| Typical End Use | Flanges, Valves, Shafts | Cryogenic Pressure Parts | Gears, Pins, Shafts |
| HS / HSN Code | 7228 / 8483 (Application Based) | 7228 / 8483 | 7228 / 8483 |
Grade-Wise Overview & Selection Guidance
🔹 ASTM A105 Carbon Steel Forged Bars
ASTM A105 forged bars are widely used for high-temperature pressure systems. They offer excellent strength, weldability, and machinability, making them ideal for valves, flanges, fittings, and pressure-retaining parts in oil & gas and power plants.
🔹 ASTM A350 LF2 Carbon Steel Forged Bars
ASTM A350 LF2 is designed for low-temperature and cryogenic applications, with mandatory impact testing to ensure toughness down to –46°C. These forged bars are commonly used in LNG plants, low-temperature pressure vessels, and offshore systems.
🔹 C45 Carbon Steel Forged Bars
C45 is a medium-carbon steel offering higher hardness and strength after heat treatment. It is preferred for mechanical components such as gears, pins, shafts, tie rods, and machine parts, where wear resistance and machinability are critical.
🌍 Global & Indian Demand Insight
In India, ASTM A105 and LF2 forged bars see strong demand in refineries, fertilizer plants, power stations, and EPC projects across Mumbai, Hazira, Vadodara, Chennai, and Vizag.
Internationally:
Inox Steel India supports these markets with ready stock, export-grade packaging, and fast dispatch from JNPT, Mundra, and Hazira ports.
Carbon Steel Forged Bars – Applications, Sizes, Pricing & Quality
Carbon Steel Forged Bars supplied by Inox Steel India are designed to meet stringent engineering, pressure, and mechanical performance requirements. Each grade is selected based on temperature range, load condition, impact requirement, and machining needs, ensuring safe and long-lasting service life in critical applications.
🧩 Applications by Grade & Industry
🔹 ASTM A105 Carbon Steel Forged Bars
Service Focus: High-temperature and pressure service
Typical Applications:
Industries Served:
Oil & Gas | Power Plants | Petrochemical | Refineries | EPC Contractors
🔹 ASTM A350 LF2 Carbon Steel Forged Bars
Service Focus: Low-temperature and cryogenic service (down to –46°C)
Typical Applications:
Industries Served:
LNG Plants | Offshore & Marine | Oil & Gas | Energy Infrastructure
🔹 C45 Carbon Steel Forged Bars
Service Focus: Mechanical and structural applications requiring higher hardness
Typical Applications:
Industries Served:
Automotive | Heavy Engineering | Machine Tools | General Fabrication
📐 Size & Dimensional Range
Inox Steel India supplies carbon steel forged bars in standard and custom dimensions, suitable for rough machining or finished CNC components.
| Form | Size Range |
|---|---|
| Forged Round Bars | 50 mm – 900 mm Ø |
| Forged Square Bars | 50 mm – 600 mm |
| Forged Flat Bars | Up to 600 mm width |
| Custom Forged Shapes | As per drawing |
| Rough Machined Bars | As per machining allowance |
📌 Cut lengths and machining allowances can be customized as per project drawings.
💰 Carbon Steel Forged Bars – Indicative Price Range (2025)
| Grade | Price Range (INR / Kg) | Price Range (USD / Kg) | Remarks |
|---|---|---|---|
| ASTM A105 | ₹ 95 – ₹ 130 | $ 1.15 – $ 1.55 | Pressure-grade forging |
| ASTM A350 LF2 | ₹ 120 – ₹ 160 | $ 1.45 – $ 1.90 | Impact-tested forging |
| C45 | ₹ 85 – ₹ 120 | $ 1.05 – $ 1.45 | Mechanical-grade forging |
🧾 Prices are indicative and vary based on size, heat treatment, machining, testing, and quantity.
🔢 HS / HSN Code – Carbon Steel Forged Bars
📌 Final classification depends on supplied condition (as-forged / machined).
🧪 Testing & Quality Assurance
Every Carbon Steel Forged Bar supplied by Inox Steel India undergoes strict quality control as per ASTM and EN standards.
Standard Tests Conducted:
✔ Ultrasonic Testing (UT)
✔ Magnetic Particle Inspection (MPI)
✔ Tensile & Yield Strength Test
✔ Elongation & Hardness Test
✔ Impact Testing (Mandatory for A350 LF2)
✔ Dimensional & Visual Inspection
Optional Third-Party Inspection:
SGS · TUV · BV · DNV · Lloyd’s (as per customer requirement)
All material is supplied with EN 10204 3.1 / 3.2 Mill Test Certificates ensuring full traceability.
🚢 Packaging & Export Readiness
Yes. Forging improves grain flow, fatigue strength, and impact resistance compared to rolled bars. HSN code is 7228 (final classification depends on supplied condition). Yes. We supply rough-machined forged bars with machining allowance. Yes. SGS, TUV, BV, DNV, and Lloyd’s inspection can be arranged. Yes. We regularly export to GCC, Europe, Africa, and the Americas. Are carbon steel forged bars stronger than rolled bars?
What is the HSN code for carbon steel forged bars?
Can forged bars be supplied in rough-machined condition?
Do you provide third-party inspection?
Do you export carbon steel forged bars?
🏭 Why Choose Inox Steel India for Carbon Steel Forged Bars?
Inox Steel India is not just a supplier — we are a forging-focused engineering partner trusted by OEMs, EPC contractors, and global buyers for pressure-grade and mechanical-grade carbon steel forged bars.
What sets us apart:
✔ In-house sourcing from approved forging mills
✔ Complete control on heat treatment & testing
✔ Supply in as-forged, normalized, QT & rough-machined condition
✔ Strict ASTM / ASME / EN compliance
✔ Project-ready documentation with EN 10204 3.1 / 3.2
✔ Competitive pricing for domestic & export orders
✔ Proven exports to GCC, Europe, Africa & Americas
Our forged bars are engineered for zero internal defects, consistent grain flow, and long service life, making them ideal for safety-critical applications.
🧩 Industries & Applications Served
| Industry | Application | Preferred Grade |
|---|---|---|
| Oil & Gas | Valves, flanges, connectors | ASTM A105 |
| Power & Energy | Turbine parts, manifolds | ASTM A105 |
| LNG & Cryogenic | Low-temp pressure parts | ASTM A350 LF2 |
| Marine & Offshore | Structural & pressure components | A350 LF2 |
| Automotive | Shafts, axles, pins | C45 |
| Heavy Engineering | Gears, spindles, tie rods | C45 |
| EPC & Fabrication | Pressure vessel components | A105 / LF2 |