A311 Seamless Steel Tube
Gnee Steel Pipe’s A311 steel pipe is a high-quality, precision-engineered product. The material undergoes a rigorous quality control process, including heat treatment and cold drawing, to achieve tight dimensional tolerances. It is available in two grades, including A311 Grade A and A311 Grade B. This steel pipe is manufactured according to ASTM A311 specifications and is an excellent choice for demanding environments.
Gnee Steel Pipe specializes in steel pipe production, using high-quality steel for stable performance. We offer cost-effective products worldwide and are your trusted partner.
If you want to know more about the grades and sizes of steel tubes, please send your requirements to email(sale@gneesteelpipe.com) or WhatsApp.
General Parameters Of A311 Seamless Steel Tube
| Product | ASTM A311 Cold-Drawn Seamless Steel Tube |
| Material | Carbon Steel |
| Outer Diameter | 6mm – 350mm or varies based on application requirements |
| Wall Thickness | 1mm – 25mm also customizable according to engineering specifications |
| Length | Available in fixed lengths or random lengths |
| Monthly Output | 20 million-30 million pieces per month |
| Standards | ASTM A311 / ASME SA311 |
| Applications | Automotive Industry / Aerospace Industry / Industrial Machinery / Construction & Structural Applications / Oil & Gas Industry |
More information About A311 Cold-Drawn Steel Tube
| Element | Composition (%) |
| Carbon (C) | 0.20 – 0.25 |
| Manganese (Mn) | 0.60 – 0.90 |
| Phosphorus (P) | ≤ 0.040 |
| Sulfur (S) | ≤ 0.050 |
| Silicon (Si) | 0.10 – 0.40 |
| Chromium (Cr) | ≤ 0.25 |
| Nickel (Ni) | ≤ 0.25 |
| Property | Value |
| Yield Strength (min) | 250 MPa (36,000 psi) |
| Tensile Strength (min) | 450 MPa (65,000 psi) |
| Elongation (min) | 0.2 |
| Hardness (Brinell) | ≤ 200 HB |
Features & Advantages of A311 Carbon Steel Tube
Gnee has been providing high-quality steel pipes with a variety of excellent properties to customers around the world for many years.
High Strength & Hardness
A311 carbon steel tubes are known for their superior mechanical properties, including high tensile strength and hardness. This makes them ideal for applications where durability and resistance to impact are crucial.
Excellent Wear Resistance
Due to its enhanced hardness, A311 steel offers exceptional wear resistance. This is particularly beneficial in applications where the material is exposed to friction, impact, or heavy loads, such as in automotive and industrial machinery.
Good Surface Finish
The manufacturing process of A311 carbon steel tubes results in a smooth and uniform surface finish. This feature is important for applications requiring minimal friction and superior aesthetic appeal.
Superior Fatigue Resistance
A311 carbon steel tubes are designed to withstand repeated stress cycles, making them highly resistant to fatigue failure. This makes them a preferred choice for load-bearing applications.
Favorable A311 Carbon Steel Pipe Prices
We can provide competitive factory prices to global customers.
Volume Discount
We provide gradually decreasing unit prices based on the quantity of steel pipes. For example, when the purchase volume reaches 100 tons, 200 tons, and 500 tons, Gnee Steel Pipe will give different discounts.
Custom Pricing
According to the specific needs (such as steel pipe material, specifications, quantity, delivery time, etc.), we can provide flexible customized quotations to meet the budgets and requirements of different customers.
Project-Based Pricing
Gnee can provide special preferential contract prices for large projects. In the process, we can also formulate flexible price plans based on the payment schedule or delivery time of the project.
What Can Gnee Guarantee For Our Customers?
Quality Assurance
As a supplier with 15 years of experience, we promise to provide high quality steel pipes, which comply with international standards and industry specifications, such as ISO, ASTM, EN, or JIS, etc. Gnee can provide relevant quality certifications, test reports & material certifications.
Faster Delivery Time
Gnee has a large inventory of steel pipes and multiple production lines. We respond to customers’ orders on time and provide customers with reasonable transportation and delivery solutions. We promise to deliver steel pipes according to the time specified in the contract.
Comprehensive Services
Gnee provides comprehensive services for customers. Services include steel pipe customization, technical support & consultation, sample provision, etc. Through the guidance of a professional team, customers can ultimately purchase steel pipe specifications, sizes, and materials that meet project requirements.
Competitive Price
As a supplier, Gnee can promise to provide competitive prices and conduct reasonable negotiations with customers. Gnee has its own factory and production lines. Also, we have established stable cooperative relationships with many reliable raw material suppliers and can provide high-quality steel pipes to the world at factory prices.
Inventory And Delivery Of Steel Pipe
Gnee factory has a large inventory of steel pipes and supports bulk orders. We also offer a variety of logistics solutions. Come and contact us.
Why Choose Gnee As A Steel Pipe Distributor?
In addition, our tubes have been successfully exported to more than 60 countries such as Vietnam, Malaysia, Indonesia, Pakistan, UAE, and South Korea, etc. Many regular customers visit our company and factory and make multiple orders.
What Services Does Gnee Provide?
Gnee can provide the following measurement services for pipe:
1. Dimensional measurement: Measure the dimensional parameters such as length, width, and thickness by measuring instruments to ensure the pipe is qualified and meets the design requirements.
2. Surface measurement: Measure parameters such as flatness, unevenness, and surface roughness of pipe surface to help ensure that the quality and surface state of the pipe meet the requirements.
3. Thickness measurement: Use a thickness measuring instrument to accurately measure the thickness of the pipe to ensure that it meets the design requirements.
4. Material measurement: Use material analysis instruments to measure the chemical composition and mechanical properties of the product to ensure that the quality and performance meet the requirements.
5. Bending and Deformation Measurements: The degree of bending and deformation of the steel pipe is measured and monitored by using tools such as bending measuring instruments and displacement sensors to ensure that it is within the allowable range.
Gnee can customize the size and shape of steel pipes for your project according to specific project needs. The custom design of the pipe is carried out by a professional engineer and design team. Based on the requirements and constraints of the project, they will use calculation and simulation tools, combined with experience and technical knowledge, to optimize the steel pipe design to meet the specific needs of your engineering.
● According to the strength requirements of structural design, adjust the thickness, width, and length of pipes.
● The shape of the steel pipe can be designed according to the characteristics of the project.
● If you consider the convenience of installation and maintenance, we can also add openings and passages for easy access and operation in the design for areas that require frequent maintenance.
Purchasing Gnee steel pipe can provide the following deep processing services. We can customize according to the specific needs of customers to meet the requirements.
Cutting service: Pipe can be custom cut to obtain the desired shape and size according to the needs of customers. For example, flame cutting, plasma cutting, laser cutting, etc., can cut steel pipes into required blocks, special-shaped parts.
Bending and forming: Pipes are bent and formed by stress application and appropriate processes to obtain the desired shape.
Welding service: Pipe can be subjected to various types of welding services, including manual arc welding, gas-shielded welding, laser welding, etc.
Turning and machining of holes: Turning and machining of holes in pipes by using machining equipment. These processes produce smooth surfaces, precise holes and threads to meet specific assembly requirements.
Surface treatment: In order to improve the corrosion resistance and aesthetics of the steel pipe, surface treatment can be carried out. This includes methods such as spraying, hot-dip galvanizing, electroplating, etc. to add a protective layer and provide corrosion resistance.
Gnee can provide the following testing services through third-party testing agencies. These third-party testing services can provide independent, objective verification that pipes comply with relevant standards and regulations.
Material chemical composition analysis: Through chemical composition analysis, determine whether the composition of the steel pipe meets the standard requirements.
Mechanical performance test: Mechanical performance test includes tensile test, impact test, bending test, etc., which are used to determine whether the mechanical properties such as strength, toughness and ductility of products meet the specified requirements.
Metallographic testing: Through metallographic testing, check the structure, grain size, non-metallic inclusions, etc. of pipes to evaluate their quality and performance.
Corrosion performance test: Through the corrosion performance test, evaluate the corrosion resistance of pipes, including salt spray corrosion resistance, chemical corrosion resistance, etc.
Hardness test: Hardness test is used to measure the hardness of pipe, and its strength and wear resistance can be evaluated according to the hardness value.
Ultrasonic flaw detection: Ultrasonic flaw detection is used to detect internal defects of pipes, such as cracks, pores, inclusions, etc.
