JIS G3445 Seamless carbon steel pipe for mechanical structures
Still deciding? Get samples first, Contact US !
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JIS G3445 Seamless carbon steel pipe for mechanical structures
Still deciding? Get samples first, Contact US !
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Product Description
JIS G 3445 steel pipe is a seamless carbon steel pipe for mechanical structure, which can be formed by bending, crimping and similar processes, and is also suitable for welding work. Pipe material grades (chemical composition) are STKM11A, STKM12A/B/C, STKM13 A/B/C, STKM14 A/B/C, etc. They are manufactured by hot forming or cold drawing process.
Product Size
Outer diameter: 21.3～610mm
Wall thickness: 2.77～22.00mm
End: Flat end
Length: 3 to 12 meters or SRL, DRL, double-footed and fixed-footedProduct Packaging
The outer surface is oiled or varnished/black painted, also hot-dip galvanized, and strapped with steel straps.
Chemical composition
C Si Mn P S Nb+V ≤，% STKM11A 0.12 0.35 0.6 0.04 0.04 一 STKM12A 0.20 0.35 0.6 0.04 0.04 一 STKM12B STKM12C STKM13A 0.25 0.35 0.30－0.90 0.04 0.04 一 STKM13B STKM13C STKM14A 0.3 0.35 0.30－1.00 0.04 0.04 一 STKM14B STKM14C STKM15A 0.2－0.35 0.35 0.30－1.00 0.04 0.04 一 STKM15C STKM16A 0.35－0.45 0.4 0.40－1.00 0.04 0.04 一 STKM16C STKM17A 0.45－0.55 0.4 0.40－1.00 0.04 0.04 一 STKM17C STKM18A 0.18 0.55 1.5 0.04 0.04 一 STKM18B STKM18C STKM19A 0.25 0.55 1.5 0.04 0.04 一 STKM19C STKM20A 0.25 0.55 1.6 0.04 0.04 0.15 Product Mechanical Properties
Tensile strength ≥, MPa Yield strength ≥, MPa Elongation at break ≥, % Specimen No. 11 or 12, longitudinal Specimen No. 5, horizontal Specimen No. 4, longitudinal Specimen No. 4, longitudinal STKM11A 290 一 35 30 33 28 STKM12A 340 175 35 30 33 28 STKM12B 390 275 25 20 23 18 STKM12C 470 355 20 15 18 14 STKM13A 370 215 30 25 28 23 STKM13B 440 305 20 15 18 14 STKM13C 510 380 15 10 14 9 STKM14A 410 245 25 20 23 18 STKM14B 500 355 15 10 14 9 STKM14C 550 410 15 10 14 9 STKM15A 470 275 22 17 20 16 STKM15C 580 430 12 7 11 6 STKM16A 510 325 20 15 18 14 STKM16C 620 460 12 7 11 6 STKM17A 550 345 20 15 18 14 STKM17C 650 480 10 5 9 4 STKM18A 440 275 25 20 23 18 STKM18B 490 315 23 18 21 17 STKM18C 510 380 15 10 14 9 STKM19A 490 315 23 18 21 17 STKM19C 550 410 15 10 14 9 STKM20A 540 390 23 18 21 17 Application
Typically used in the construction of machinery, automobiles, bicycles, furniture, appliances and other mechanical components.
Production And Processes
We have two pipe product manufacturing bases in Yantai, Shandong Province. One of them, the General Pipe Manufacturing Base, has a history of nearly 70 years and is equipped with five hot-rolling production lines and one cold-drawing production line, with an annual production capacity of up to 500.000 tons. Leveraging our mature production processes and economies of scale, our product range encompasses over 1.000 specifications of pipe products, fully compliant with international standards such as API 5L, ASTM A106. and ASTM A333. While ensuring quality, we also offer a leading price advantage.
Our high-standard pipeline product production base has a stable production capacity of 800.000 tons, primarily producing high-grade steel products such as API 5L X100 PSL2. API 5CT Super 13Cr, and ASTM A335 P91. Our product specifications cover a wide range, with a maximum outer diameter of 20 inches, a wall thickness of up to 70 millimeters, and a single-piece length of up to 36 meters, capable of meeting the demands of steel pipes in various harsh operating conditions.
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Inventory And Quality Inspection
We operate under the YANTAIPIPE brand and have established solid partnerships with a number of outstanding manufacturers of steel pipes, pipe fittings, flanges, and valves. We operate three large warehouses and processing plants in Yantai and Cangzhou ensuring a minimum inventory capacity of over 35.000 tons. We not only provide products but also offer comprehensive services such as project packaging, corrosion-resistant coatings, advanced processing, and customized solutions. Through our mature supply chain system and resource integration capabilities, we create added value for our customers from all angles, enabling us to maintain a core competitive advantage in the international market!
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Qualification
Customer visit
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International Cooperation
Our products have been widely used in major energy projects around the world. We provide services to international energy giants, including China National Petroleum Corporation, Sinopec, Shell, Total, as well as national oil companies from Kuwait, Azerbaijan, Abu Dhabi, Qatar, Algeria, and Saudi Arabia. This has allowed us to accumulate extensive experience in serving international projects.
Main Projects
We are deeply involved in major global energy projects, including the Clean Fuel Project of Kuwait National Petroleum Company (KNPC), the North Field East (NFE) LNG Project in Qatar, the multiphase flow processing station project in Hassi Messaoud, Algeria, and the modernization project of SOCAR Haor for the State Oil Company of Azerbaijan (SOCAR). We provide our clients with comprehensive solutions that cover procurement, processing, quality inspection, delivery, and after-sales service.
FAQs
Do you require a minimum order quantity(MOQ)?
We have no minimum order quantity requirements. Even if you only need one steel pipe or one pipe fitting, we can deliver on time and provide comprehensive services. Please note that certain high-grade steel products may require temporary production scheduling, which may result in minimum order quantity requirements. For specific details, please consult our sales team.
Do you offer product samples?
Of course, we provide free samples for products priced below $1,000. You only need to cover the shipping costs. For products priced above $1,000, please contact our sales team to discuss specific fees.
How long is your shipping cycle?
For products that are in stock, we will complete the final processing, quality inspection, packaging, and other steps within two weeks and deliver them as soon as possible according to the shipping schedule. For products that need to be ordered for production, an additional 2-3 weeks of production time will be required depending on the quantity requested.
Do you offer additional quality assurance?
In addition to providing factory warranty certificates, we can also provide test reports from internationally recognized quality testing agencies such as SGS, TUV, and DNV upon customer request. We are also available to assist third-party testing agencies with process inspections and final inspections prior to shipment.
Is it possible to visit your factory?
Of course! Whether it's our own factory, processing plant, or our partners' factories, we welcome you to visit and exchange ideas at any time. If you need our assistance with visa matters, please feel free to contact our sales manager.
Are you a supplier or a manufacturer?
We are both a supplier and a manufacturer. We have three processing plants and warehouses, as well as a seamless steel pipe factory. We also collaborate closely with other outstanding steel pipe and pipe fitting factories in China, enabling us to offer a wide range of product specifications and a complete product system.
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Contact Us
E-mail: info@yantaipipe.cn
WhatsApp: 85291470412
Tel: 0086-535-6281117
Add: No. 161 Changjiang Road, FTZ, Yantai , China