AISI 314 (UNS S31400, DIN 1.4841, Grade 314) Forged Parts | China Manufacturer
Jiangsu Liangyi is a professional ISO 9001:2015 certified manufacturer of high-quality AISI 314 (UNS S31400, DIN 1.4841, Grade 314) open die forging parts and seamless rolled steel forged rings from China. With over 25 years of manufacturing experience, we produce custom forged components that meet international standards including ASTM, AISI, DIN, and EN, serving customers in more than 50 countries worldwide including the United States, Germany, Saudi Arabia, and the United Arab Emirates.
AISI 314 Quick Reference Facts
- Designations: AISI 314 = UNS S31400 = DIN 1.4841 = Grade 314
- Type: High-alloy chromium-nickel-silicon austenitic stainless steel
- Max. Continuous Service Temperature: 1150°C (2100°F)
- Creep Resistance: Up to 690°C
- Key Composition: Cr 23–26%, Ni 19–22%, Si 1.5–3%, C ≤ 0.25%
- Tensile Strength: ≥ 689 MPa | Yield Strength: ≥ 345 MPa | Elongation: ≥ 40%
- Standards: ASTM A788, ASTM A276; MTC EN 10204 3.1 / 3.2
- Production Range: 30 kg – 30,000 kg per piece; annual capacity 120,000 tons
- Lead Time: 3–4 weeks (standard bars/rings); 4–6 weeks (custom machined)
- Minimum Order: 30 kg
Figure 1: AISI 314 forged round bars and seamless rolled rings produced by Jiangsu Liangyi, China's leading forging manufacturer
About AISI 314 Stainless Steel (UNS S31400 / DIN 1.4841)
AISI 314 is an austenitic stainless steel with a high alloy content of chromium, nickel and silicon and is especially designed for extreme high temperature applications. In North America this grade is known as UNS S31400 and in Europe as DIN 1.4841. The unique chemical composition of this grade gives it an excellent oxidation resistance and creep strength at elevated temperatures for the material of choice for heavily loaded parts of equipment working in harsh thermal environments. AISI 314 is a better performing heat-resistant stainless steel than other commonly used grades for demanding industrial applications:
| Material | Maximum Continuous Service Temperature | Key Advantage |
|---|---|---|
| AISI 314 (UNS S31400 / DIN 1.4841) | 1150°C (2100°F) | Excellent oxidation resistance and creep strength |
| AISI 310S | 1095°C (2000°F) | Good general high-temperature performance |
| AISI 309S | 980°C (1800°F) | Economical for moderate temperatures |
| AISI 304 | 870°C (1600°F) | General purpose stainless steel |
Available AISI 314 Forged Product Shapes & Sizes
As a leading Chinese forging manufacturer located in Jiangsu Province, we produce a comprehensive range of AISI 314 forged steel products in various shapes and sizes to meet diverse industrial requirements. Our production capacity ranges from 30 kg to 30,000 kg per piece with an annual manufacturing capacity of 120,000 tons.
Forged Bars and Rods
- AISI 314 Forged Steel round bars, square bars, flat bars, and rectangular bars
- Custom step shafts, gear shafts, and crankshafts
- Maximum diameter up to 2 meters, single-piece weight up to 30 tons
- Available in lengths up to 15 meters
Seamless Rolled Rings
- Grade 314 Forging forged rings and seamless rolled rings
- Gear rings, slewing bearing rings, and contoured rolled rings
- Large-size ring capacity up to 6 meters in diameter
- Heavy-duty forged ring weight up to 30 tons
Hollow Components
- UNS S31400 Forged Steel hubs, housing shells, sleeves, bushes, and cases
- AISI 314 Forged Forging Steel pipes, tubes, tubings, and piping shells
- Custom hollow bars and cylinders with outer diameter up to 3000 mm
- Heavy wall thickness options available
Flat and Block Components
- UNS S31400 Forged Forging Steel discs, disks, blocks, and plates
- Forged tube sheets, baffle plates, and flanges
- Custom machined components according to customer drawings
- Precision CNC machining services available
Industrial Applications & Project References
AISI 314's exceptional heat resistance up to 1150°C (in practice up to 1100°C) and creep resistance up to 690°C make it ideal for heavily loaded equipment parts that require resistance to oxidation and cyclic thermal loads. Our UNS S31400 forged components are widely used in the following industries:
Figure 2: Precision AISI 314 valve components and industrial forgings manufactured in China for oil & gas and power generation industries
Valve Industry Applications
Our Grade 314 forged components are extensively used in high-temperature valve applications across the globe. We have supplied thousands of AISI 314 valve parts to leading valve manufacturers in Europe, North America, and the Middle East:
- Forged valve balls, bonnets, bodies, stems, closures, seat rings, cores, and discs
- Components for H-type two-way and one-way back pressure valves
- Ball valves, check valves, and gate valves for high-temperature processes
- Butterfly valve main shafts and spindles for power plants
- Flowseal cryogenic high-performance butterfly valve (HPBV) shafts
- Oil measurement valve spools and ultrasonic flow meter bodies
Oil and Gas Industry Applications
AISI 314 forged parts play a crucial role in the oil and gas sector, particularly in high-temperature and high-pressure upstream and downstream operations. We have supplied critical components for major oilfield projects in Saudi Arabia, UAE, Russia, and Kazakhstan:
- Downhole drilling tool components including mud motor splined drive shafts
- Downhole electric submersible pumps (ESP) motor splined shafts
- Christmas trees and wellhead spool bodies for offshore platforms
- Double studded adapter flanges and integral mud flanges
- Flanged outlets and studded crosses for pipeline systems
- Casing heads, tubing heads, casing hangers, tubing hangers, and spools
- Swept branches outlets and steel fittings for refineries
Nuclear Power Industry Applications
Our UNS S31400 forged components are used in critical nuclear power applications where reliability and safety are paramount. We have supplied components for nuclear power plants in China, South Korea, Pakistan, and Southeast Asia:
- Nuclear reactor coolant pump casing shells and bodies
- Nuclear reactor coolant pumps containment seal chambers
- Pressure vessel and reactor nozzles
- Venturi cone meter bodies and blocks for nuclear facilities
Power Generation and Turbomachinery
AISI 314 is widely used in thermal power plants and industrial turbomachinery due to its excellent high-temperature strength. We have supplied components for power plants with a total capacity of over 10,000 MW in India, Indonesia, Vietnam, and Turkey:
- Turbomachinery and turbo centrifugal compressor impellers
- Compressor shrouded impellers for gas turbines
- Pump casings, covers, barrels, impellers, shafts, housings, and wear rings
- Boiler, heat exchanger, and pressure vessel components
- Tube sheets, baffle plates, nozzles, and channel flanges
AISI 314 Chemical Composition (UNS S31400 / DIN 1.4841)
The superior high-temperature properties of AISI 314 are derived from its carefully balanced chemical composition. Our forging materials are strictly controlled to meet ASTM specifications. The high silicon content (1.5–3%) is the key differentiator that gives AISI 314 its superior oxidation resistance compared to other 300-series stainless steels:
| Element | Symbol | Percentage (%) |
|---|---|---|
| Iron | Fe | Balance |
| Chromium | Cr | 23–26 |
| Nickel | Ni | 19–22 |
| Silicon | Si | 1.5–3 (key differentiator) |
| Manganese | Mn | ≤ 2 |
| Carbon | C | ≤ 0.25 |
| Sulfur | S | ≤ 0.03 |
| Phosphorus | P | ≤ 0.045 |
Mechanical Properties
Our AISI 314 forged parts are supplied with the following guaranteed mechanical properties after proper heat treatment. We test all of our forged products to make sure they all meet international standards:
| Property | Value | Test Standard |
|---|---|---|
| Tensile Strength | 689 MPa (minimum) | ASTM A370 |
| Yield Strength (0.2% Offset) | 345 MPa (minimum) | ASTM A370 |
| Elongation at Break (in 50 mm) | 40% (minimum) | ASTM A370 |
| Hardness (Rockwell B) | ≤ 85 | ASTM E18 |
Our Advanced Manufacturing Process
As a leading Chinese forging producer we have the ability to control every step of the manufacturing process from melting of raw materials to final inspection to ensure each AISI 314 forged part is of the highest possible quality. We make the highest quality forgings with the modern equipment:
1. Raw Material Melting
We use advanced melting technologies to produce high-quality AISI 314 steel ingots. The following are these advanced melting equipment:
- 30-ton Electric Arc Furnace (EAF)
- 30-ton Ladle Refining Furnace (LF)
- Vacuum Oxygen Decarburization (VOD)
- Vacuum Induction Melting (VIM) for special requirements
- Electro Slag Remelting (ESR) for critical applications
2. Forging Process
Our state-of-the-art forging equipment guarantees proper grain matrix and mechanical properties:
- 2000–6300 tons hydraulic forging presses
- 1–5 tons electro-hydraulic forging hammers
- 1–5 meters seamless ring rolling machines
- Radial forging machines for precision shafts
- Minimum 3:1 forging ratio to guarantee consistent wrought matrix
3. Heat Treatment
We perform heat treatment to get the required mechanical properties:
- Solution annealing at 1050–1100°C
- Controlled cooling processes
- Ten computer-controlled heat treatment furnaces
- Comprehensive temperature monitoring and recording
4. Machining and Finishing
We offer complete machining services to deliver ready-to-install components:
- CNC turning, milling and drilling
- Precision grinding and honing
- Weld overlay services for wear resistance
- Surface treatment options available
Quality Assurance and Certifications
We produce UNS S31400 forged parts as per ASTM A788 specifications and strictly control the quality of all parts.We are ISO 9001:2015 certified, and can provide third party inspection services if requested from SGS, BV, TUV or Lloyd's Register.
Comprehensive Quality Inspection
In order to make sure all parts meet the clients requirement, we apply the following testing and inspection:
- Chemical analysis and spectral analysis
- Mechanical property testing (tensile, bending, impact)
- Hardness measurement using multiple methods
- Ultrasonic testing (UT) according to international norms
- Magnetic particle inspection (MPI)
- Dye penetrant testing
- X-ray testing for important components
- Intergranular corrosion testing (Huey test)
- 3D dimensional check using CMM
- Positive Alloy Material Identification (PAMI)
- Metallographic microscope investigation
We provide complete Mill Test Certificates (MTC) EN 10204 3.1 or 3.2 with every shipment, documenting all test results and material traceability from melting to final inspection.
Why Choose Jiangsu Liangyi as Your AISI 314 Forging Supplier in China
China Manufacturing Advantages
We are a top forging manufacturer located in Jiangsu Province, and we have the following advantages :
- Competitive Pricing: Lower production costs without compromising quality
- Large Production Capacity: 120,000 tons annual capacity for timely delivery
- Complete In-House Production: From melting to machining under one roof
- Experienced Engineering Team: 25+ years of forging expertise
- Global Export Experience: Exported to 50+ countries worldwide
- Customization Capabilities: Produce according to your drawings and specifications
- Fast Response Time: 24-hour customer service and quotation support
- Quality Certifications: ISO 9001:2015 certified with full MTC documentation
Frequently Asked Questions (FAQ) — AISI 314 Forged Parts
What is the difference between AISI 314 and AISI 310S?
AISI 314 has a higher silicon content ranging from 1.5% to 3%, compared with no more than 1.5% for AISI 310S. This higher silicon level greatly improves its ability to resist oxidation at high temperatures. AISI 314 can work steadily at a continuous temperature up to 1150°C, while AISI 310S can only endure up to 1095°C. AISI 314 also delivers better creep strength when the temperature exceeds 600°C, so it is the preferred material for ultra high-temperature working conditions in the oil and gas as well as power generation industries.
What standards do your AISI 314 forged parts comply with?
Our AISI 314 forged parts fully meet the requirements of ASTM A788, the general standard for steel forgings, and ASTM A276 for stainless steel bars and shapes. We can also manufacture goods in line with other international standards such as DIN, EN and JIS, as well as custom requirements from customers. All our materials feature complete traceability and come with mill test certificates compliant with EN 10204 3.1 or 3.2.
What is the minimum order quantity for AISI 314 forged parts?
Standard AISI 314 forged parts have a minimum order weight of 30 kg. The minimum order quantity for custom parts depends on the part drawing and overall size of each part. We accept small trial orders for new customers. Please do not hesitate to contact us to discuss your individual project needs.
What is the typical lead time for AISI 314 forged parts?
For standard AISI 314 forged bars and rings, the lead time is 3–4 weeks. For custom machined components, the lead time is 4–6 weeks. The actual lead time depends on part drawings, quantity and client requirements. We can also speed up production for urgent orders.
Do you provide machining services for AISI 314 forged parts?
Yes, we provide full CNC machining services including turning, milling, drilling, grinding and honing. We can supply AISI 314 forged parts in rough machined, semi-finished or fully finished state as per your needs. Our in-house machining capacity guarantees precise tolerances and stable quality for all forged parts.
Can you provide third-party inspection services?
Yes, third-party inspections conducted by SGS, BV, TÜV and Lloyd's Register are available upon request. We maintain long-term cooperation with many inspection bodies and can coordinate the entire inspection process on your behalf. Unless otherwise agreed in the contract, all third-party inspection costs shall be borne by the customer. We also welcome customer representatives to visit our manufacturing facility in Jiangsu, China for pre-shipment on-site inspections.
What are your payment terms?
Our standard payment terms are 30% T/T deposit, the remaining 70% T/T paid before shipment. We are able to offer more flexible payment terms for long-term regular customers. We also accept L/C at sight for big orders. Our finance team deals with the leading banks around the world and can provide multiple payment options to help ensure smooth business deals. If you would like to discuss suitable payment arrangements for your order please contact us.
Do you export AISI 314 forged parts worldwide?
Yes, we have supplied AISI 314 forged parts to over 50 countries , such as Europe, the Middle East, Asia, Australia ,South America and others. We have rich experience in international shipping and can deal with all export documents, customs clearance and logistics arrangements. Every part can be delivered safely and on time to your destination.
What certifications do you provide with AISI 314 forged parts?
We supply complete Mill Test Certificates (MTC) in EN 10204 3.1 or 3.2 form with every shipment. These records cover full chemical composition data, mechanical performance values, heat treatment parameters and all inspection test results. We hold ISO 9001:2015 certification, and we can provide extra supporting certificates if you need them. All our qualification documents are internationally recognized and widely accepted by major industrial sectors around the world.
Can you produce AISI 314 forgings according to custom drawings?
Sure! We specialize in producing custom AISI 314 forged parts based on customer drawings and technical requirements. Our experienced engineering team can verify your drawings, conduct forging feasibility assessment and offer reasonable design improvement to facilitate production and reduce cost. We support standard CAD file formats and can produce parts with complex geometries. Send us your drawings, we will give you a detailed quotation and professional technical review.
Contact Us for AISI 314 Forging Quotations
Jiangsu Liangyi Co., Limited is your reliable supplier from China for premium AISI 314 (UNS S31400, DIN 1.4841, Grade 314) forged parts . We welcome your inquiries and can offer competitive pricing and high-quality products customized to your exact needs.
Please send us your custom drawings, material specifications and order quantity, and we will prepare a detailed quotation for you. Our professional engineering team will cooperate closely with you to work out the most suitable forging solution for your actual use. Located in Jiangsu Province, we are able to deliver efficient service to customers all over the world.
sales@jnmtforgedparts.com
+86-13585067993
www.jnmtforgedparts.com
Chengchang Industry Park, Jiangyin City, Jiangsu Province, China