Forged Forging Bars | Leading Forged Steel Bars Manufacturer & Supplier in China
Reference price: 2.00 USD per kilogram (reference ex-works price; final quotation depends on steel grade, dimensions, heat treatment, machining, order quantity, and inspection requirements)
Product Overview of Forged Forging Bars
Established in 1997,Jiangsu Liangyi Co., Limited is a professional ISO 9001:2015 certified manufacturer and supplier of forged forging bars in China, we have over 25 years of industry experience. Our main products are high-quality forged steel round bars, forging steel flat bars, forged square bars, forging rectangular bars, and forged steel hollow bars. Our forged bars are in a full range of materials, including alloy steel, carbon steel, nickel alloy, stainless steel, and tool & die steel, fully in accordance with ASTM, AISI, DIN, EN, JIS and other international standards. We will provide a Mill Test Certificate (MTC) 3.1/3.2 for each bar for material trace. Products are exported to 50+ countries across the Middle East, Europe, Southeast Asia, and North America.
Why Choose Jiangsu Liangyi as Your Forged Bars Supplier
Here are six main reasons why our international clients in oil & gas, aerospace, power generation and railway industries choose Jiangsu Liangyi as their trusted forged steel bars manufacturer from China:
25+ Years Manufacturing Experience
Established in 1997, with over 25 years of open die forging experience and 120,000-ton annual production capacity.
ISO 9001:2015 Certified Quality
ISO 9001:2015 certified. 100% inspection with MTC 3.1/3.2 provided. SGS, BV, TÜV third-party inspection supported.
Largest Forging Capability in Class
Max diameter 2 meters, max single-piece weight 30 tons. Production range from 30 kg to 30,000 kg per piece.
International Standards Support
In accordance with ASTM, AISI, DIN, EN, JIS, API 6A, and AMS aerospace standards. Custom proprietary standards are also accepted.
In-House Heat Treatment
Annealing, Normalizing, Solution Treatment, Aging, and Q&T – all finished in-house with documented records per client’s requirements.
Custom Packaging & Quick Response
Rust-preventive oil + wooden case packaging for ocean freight. Free quotation within 24 hours upon receipt of drawings.
Production Capabilities of Our Factory
As a leading forged bars factory in China, we have the most advanced open die forging equipment and complete production lines from steel melting to final machining. Main capabilities include:
- Maximum diameter of forged round bars: up to 2 meters (2000 mm)
- Maximum single-piece weight: up to 30 tons (30,000 kg)
- Custom production range: 30 kg to 30,000 kg per piece, as per clients’ drawings
- Annual manufacturing capacity: 120,000 tons of forged steel products
- Factory equipment: 10,000-ton hydraulic open die forging presses
- All finished in-house: raw material → forging → heat treatment → machining → NDT inspection → delivery
Forged Bar Types & Main Size Range
| Bar Type | Shape | Max Size | Max Weight | Main Uses |
|---|---|---|---|---|
| Forged Round Bar | Circular cross-section | Ø2000 mm | 30 tons | Shafts, pins, rollers, turbine parts |
| Forged Flat Bar | Rectangular flat profile | Width 2000 mm | 30 tons | Flanges, structural parts, heavy equipment |
| Forged Square Bar | Square cross-section | Side 800 mm | 20 tons | Tooling, die inserts, punch tools |
| Forged Hollow Bar | Tubular / hollow round | OD 1200 mm | 20 tons | Pressure vessels, piping, marine shafts |
| Forged Rectangular Bar | Rectangular cross-section | Width 2000 mm | 30 tons | Aerospace structural parts, heavy machinery |
Open Die Forging Steps – How Do We Produce Forged Bars
Every forged forging bar from Jiangsu Liangyi is made by a strict 7-step open die forging manufacturing method, in this case it will have great mechanical properties, good size accuracy and full quality traceability:
Choose certified steel billets per suitable material grade (ASTM, DIN, EN or JIS). Check chemical composition on arrival and make records in certification.
Heat the billet to the best forging temperature (normally 1100°C–1250°C for carbon/alloy steel; adjustable for stainless steel and nickel alloys) for uniform plastic deformation.
Compress and shape the heated billet under a 10,000-ton hydraulic press. Refine the grain structure multiple times, eliminate voids, and shape the bars into round, flat, square, hollow, or rectangular forms.
We carry out heat treatment in accordance with clients’ technical requirements and provide heat treatment records and hardness test reports.
Machine to required sizes using CNC equipment. Surface finish, size tolerance, straightness and concentricity checked against clients’ drawings.
We will do inspection on chemical composition, mechanical property (tensile, yield, elongation, impact), UT, PT, grain size, and other NDT per client and standard requirements. We also accept Third-party inspection like SGS, BV, TÜV.
Provide MTC 3.1/3.2 certification. Apply a rust-preventive oil coating. Pack in wooden cases or pallets for ocean freight. Arrange international shipping to the client's destination worldwide.
Custom Heat Treatment Method for Forged Bars
To meet the mechanical property requirements of different industries and working conditions, we provide custom heat treatment services for all of our forged forging bars, including:
- Annealing – for stress relief, softening and improved machinability
- Normalizing – for grain refinement and improved toughness
- Solution Treatment – for stainless steel and nickel alloy grades to maximize corrosion resistance
- Aging Treatment – for precipitation hardening stainless steel (17-4PH, 15-5PH) and nickel alloys (Inconel 718)
- Quenching and Tempering (Q&T) – for maximum hardness, strength and impact resistance in alloy steel bars
All heat treatments are finished per clients’ technical manuals and international material standards. Full heat treatment records and hardness test reports are provided with each shipment.
Forged Bars vs. Rolled Bars – Main Differences
One of the most frequently asked questions is: why choose forged bars but not rolled bars? The table below clearly explains the main differences to help you make the right material choice for your application:
| Comparison Factor | 🔨 Forged Bars (Open Die) | ⚙️ Rolled Bars |
|---|---|---|
| Manufacturing Method | Open die forging press | Rolling mill |
| Grain Structure | Refined, directional grain flow | Uniform but less refined |
| Tensile Strength | Higher (superior) | Standard |
| Fatigue Resistance | Significantly higher | Moderate |
| Impact Toughness | Excellent | Good |
| Internal Defects | Minimal (porosity eliminated) | Possible internal voids |
| Max Diameter / Size | Up to 2 meters / 30 tons | Typically ≤ 500 mm |
| Custom Sizes | Fully custom per drawing | Standard sizes only |
| Main Uses | Oil & Gas, Aerospace, Power Gen, Railway | General construction, fabrication |
| Certification | MTC 3.1/3.2, API 6A, AMS, ISO | MTC 2.2 / 3.1 standard |
Wide Uses & Industry Cases of Forged Forging Bars
Main Uses
Our forged forging bars are widely used in main parts manufacturing in many global industries, including:
- Multiflanged shafts, thrust shafts, countershafts, piston pins and pipe connectors
- Eccentric shafts, drive shafts, camshafts for different machinery
- Turbine blades, turbine shafts, turbogenerator shafts and turbine rotors for power generation
- Boiler parts, locomotive axles, block headers for the railway industry
- Railway and wagon axles, wagon pull rods for heavy-duty machinery, automotive and aerospace industries
- Forged rolls, cold rolling forgings, pins, die inserts, cutting boards and special drills
- Structural parts for aerospace equipment (AMS standards)
Industry Cases
With good quality and custom solutions, our forged steel bars have been used in project references across more than 50 countries. Main cases are as following:
- Oil & Gas Industry: Supplied AISI 4140 alloy steel forged round bars and ASTM A694 F60 forged flat bars for wellhead equipment in the Middle East. Accordance with API 6A, 100% NDT tested. Supporting 12 onshore and offshore platforms.
- Power Generation Industry: 304H stainless steel forged round bars and 17-4PH forged square bars are made to turbine shafts in 8 thermal power plants in Southeast Asia. Custom solution treatment and aging treatment are used.
- Railway & Heavy Transportation: AISI 1045 carbon steel forged round bars for locomotive axles to an European company. Q&T heat treatment for good fatigue life. Covering 500+ heavy-duty wagon parts.
- Aerospace Industry: Inconel 718 forged rectangular bars and 15-5PH stainless steel forged bars for top European aerospace manufacturers. All are in accordance with AMS for aero-engine structural parts.
- Marine & Shipbuilding Industry: 316L stainless steel forged hollow bars and 42CrMo4 alloy steel forged round bars for marine propeller shafts and boiler parts. It has good resistance to saltwater corrosion.
Quality Inspection on Forged Forging Bars
As a professional forged steel bars manufacturer in China, quality is the most important. We will do 100% strict inspection on all of our forging bars before shipping, including:
- Chemical composition test – make sure the material grade is in accordance with ASTM/DIN/EN/JIS standards
- Mechanical property test – tensile strength, yield strength, elongation, reduction of area, impact toughness (Charpy V-notch)
- Ultrasonic test (UT) – detects internal defects, voids and inclusions per ASTM A388 or EN 10228-3
- Penetration test (PT) – detects surface cracks and surface defects
- Grain size test – check microstructure quality per ASTM E112 after heat treatment
- Hardness test – Brinell (HB) or Rockwell (HRC) per customer requirement
- Other non-destructive and metallographical tests per client requirements
A Mill Test Certificate (MTC) 3.1/3.2 will be provided for every batch. We also support inspections from third-parties like SGS, Bureau Veritas (BV), TÜV.
Material Grades for Forged Forging Bars
We can produce forged forging bars with a full range of material grades, including:
Carbon Steel Forged Bars
AISI 1045, ASTM A105, ASME SA350 LF1, LF2, LF3, LF6, A707, ASTM A694 F60, F50, F70
Stainless Steel Forged Bars
303, 304/L/H, 316/L/H, 310, 317/L, 321/H, 347/H, AISI 316LN, AISI 317LN, AISI 410, AISI 416, AISI 420, AISI 440, 15-5PH, 17-4PH (AISI 630), 17-7PH (AISI 631), 254 SMO, Nitronic 50, Nitronic 60, Duplex & Super Duplex SS (2205, 2507, Zeron 100, Ferralium 255, SAF 2520), 904L, Alloy 20, Al-6XN, 654SMO, A286, ASTM A453 Grade 660, and more custom grades
Alloy Steel Forged Bars
AISI 4130, AISI 4140, AISI 4330, AISI 4340, AISI 8620, AISI 8630, AISI 9310, 42CrMo4, 25CrMo4, 34CrNiMo6, 17CrNiMo6-4, 34CrMo4, 30CrNiMo8, 36CrNiMo4, 40NiCrMo7, 41CrALMo7, 16MnCr5, St52-3, S355J2G3, and more DIN/EN standard grades
Chrome Moly Steel Forged Bars
ASTM A182-F1, A182-F5, A182-F5A, A182-F9, A182-F11, A182-F12, A182-F22, A182-F22V, A182-F91, A182-F92
Nickel Alloy Forged Bars
Nickel 200, Nickel 201, Monel 400, Monel K-500, Hastelloy C-22, Hastelloy X, Hastelloy C-276, Hastelloy B-2, Inconel 600, Inconel 601, Inconel 617, Inconel 625, Inconel 718, Inconel X-750, Incoloy 800, Incoloy 800H, Incoloy 800HT, Incoloy 825, Nimonic 75, Nimonic 80A, Nimonic 90, and more super alloy grades
Global Cases – 50+ Countries
Jiangsu Liangyi Co., Limited has provided forged forging bars to many clients in more than 50 countries in the Middle East, Europe, Southeast Asia, and North America. See our full project reference list for details. Below is a summary of main cases:
Oil & Gas
AISI 4140 forged round bars and ASTM A694 F60 forged flat bars for wellhead equipment and pipeline connectors in the Middle East. In accordance with API 6A, 100% NDT tested. 12 platforms supplied.
Power Generation
304H and 17-4PH forged square bars for turbine shafts and blade parts in 8 thermal power plants in Southeast Asia. Custom solution treatment and aging treatment are used.
Railway & Transportation
AISI 1045 forged round bars for locomotive axles supplied to European heavy-duty railway company. Q&T heat treatment. 500+ wagon parts are delivered.
Aerospace
Inconel 718 forged rectangular bars and 15-5PH stainless steel forged bars for aero-engine structural parts. In full accordance with AMS. Supplied to top European aerospace manufacturers.
Marine & Shipbuilding
316L stainless steel forged hollow bars and 42CrMo4 alloy steel round bars are used to make marine propeller shafts and boiler parts. Great resistance to saltwater corrosion.
Mining & Heavy Machinery
Custom forged rolls, die inserts, and drive shafts for mining and heavy construction machinery clients across Asia, Australia and South America.
For project reference documents and client certifications, please contact us at [email protected] or visit our Reference page.
Frequently Asked Questions – Forged Forging Bars
Below are the most common asked questions from our clients about forged forging bars. Contact us if your question is not listed.
Contact China Forged Bars Manufacturer for Free Quotation
Jiangsu Liangyi Co., Limited is your reliable China forged forging bars manufacturer and supplier with over 25 years of experience. We are providing high-quality forged steel products, custom heat treatment methods and full quality certification document for our clients. Send your drawings, material requirements and order quantity today to get a detailed and competitive quotation within 24 hours!
📧 Inquiry Email: [email protected]
📞 Phone / WhatsApp: +86-13585067993
🌐 Official Website: https://www.jnmtforgedparts.com
📍 Address: Chengchang Industry Park, Jiangyin City, Jiangsu Province, 214400, China
🕐 Response Time: Within 24 hours (Mon–Fri, 08:00–18:00 CST)