Shandong Kuaima  Steel Co., Ltd.



1.4462 Duplex Stainless Steel Pipe Manufacturer


Product introduction

Product characteristics

Product introduction

1.4462 duplex stainless steel pipes are used in pressure vessels, high pressure storage tanks, high pressure pipelines, heat exchangers (chemical processing industry), desalination and waste water treatment systems. Oil and gas pipelines, heat exchanger fittings, pulp and paper industry classifiers, bleaching equipment, storage and processing systems. Rotating shafts, pressure rollers, blades, impellers, etc. in high strength, corrosion resistant environments. Food processing equipment.

These stainless steels in quality 4462 have higher rust resistance than 304 and 316 quality materials and are chemically austenitic and ferritic stainless steels. They are harder than stainless steel and twice as resistant to austenitic materials.

Due to their duplex structure, DIN EN 1.4462 duplex stainless steels exhibit excellent corrosion resistance in acidic environments (especially phosphoric and organic acids) and in media containing chlorides, and are insensitive to intergranular and stress corrosion cracking, even after welding.

Product Display

ItemDuplex stainless steel tube
Product name1.4462 Duplex Stainless Steel Pipe Manufacturer
Place of OriginShandong,China
Brand NameKuaima
SizeAccording to customer needs
SurfaceBrushed, Polished, Etched,etc.
ApplicationDecoration,Petroleum, Chemical, Medical, Light Industry, Mechanical Instrumentation, etc.
Processing ServiceBending, Welding, Decoiling, Punching, Cutting, Moulding
Payment termsL/C,T/T,D/P,etc.(According to customer needs)
Price TermCIF,CFR,FOB,EXW,etc.


Stainless steel square tube is a kind of hollow long steel, because the section is square, it is called square tube. A large number of pipes are used for conveying fluids, such as oil, natural gas, water, gas, steam, etc. In addition, when the bending and torsional strength are the same, the weight is lighter, so it is also widely used in the manufacture of mechanical parts and engineering structures.


Stainless steel square pipe classification: square pipe is divided into two categories: seamless steel pipe and welded steel pipe (seamed pipe). According to the cross-sectional shape, it can be divided into square and rectangular pipes. The widely used round steel pipes are round steel pipes, but there are also some semicircular, hexagonal, equilateral triangle, octagonal and other special-shaped steel pipes.

For stainless steel square pipes under fluid pressure, hydraulic tests should be carried out to check their pressure resistance and quality. If there is no leakage, wetting or expansion under the specified pressure, it is qualified. Some steel pipes should be rolled according to standards or requirements of the buyer. Edge test, flaring test, flattening test, etc.

Square tube specification: 5*5~150*150 mm Thickness: 0.4~6.0 mm

Square tube material: 304, 304L, TP304, TP316L, 316, 316L, 316Ti, 321, 347H, 310S.

Production Process

Round bar preparation → heating → hot rolling and piercing → cutting head → pickling → grinding → lubrication → cold rolling → degreasing → solution heat treatment → straightening → pipe cutting → pickling → finished product inspection.

performance analysis

Metals can react with oxygen in the atmosphere to form an oxide film on the surface. The iron oxide formed on ordinary carbon steel will continue to oxidize, so that the rust will continue to expand, and eventually holes will be formed. This protects the carbon steel surface by electroplating with paint or oxidation-resistant metal, but this protective layer is only a thin film, and if the protective layer is destroyed, the underlying steel begins to rust again. Whether the stainless steel pipe is corroded is related to the chromium content in the steel. When the chromium content in the steel reaches 12%, in the atmosphere, a layer of passivation and dense chromium-rich oxide is formed on the surface of the stainless steel pipe to protect the surface, which can prevent further re-oxidation. This oxide layer is extremely thin, through which the natural luster of the steel surface can be seen, giving stainless steel a unique surface. If the chromium film is destroyed, the chromium in the steel and the oxygen in the atmosphere will regenerate a passive film, which will continue to play a protective role. In some special environments, stainless steel will also fail due to some local corrosion, but different from carbon steel, stainless steel will not fail due to uniform corrosion, so the corrosion allowance is meaningless for stainless steel pipes.


Q: What are your payment terms?
A: We usually accept T/T in advance, large L/C. If you prefer other payment methods, please discuss.

Q: What are the delivery terms?
A: EXW, FOB, CIF, etc.

Q: What are the packing terms?
A:Normally, we pack the goods in bundles or coils with rods or straps, we can also pack the goods according to the customer's requirements.

Q: What is your delivery time?
A:For stock products, we can ship within 7 days after we receive the deposit. For custom orders, the production time is
15-30 working days after receipt of deposit.

Q: Can you produce from samples?
A: Yes, we can customize from your samples or technical drawings, and we can make molds and fixtures.

Q: If I accept your quality, can I place a sample order? What is your minimum order quantity?
A: Yes, we can send you samples, but you can pay for the courier, and our minimum order quantity is 1 ton.

Q: How do you guarantee your products?
A: We accept and support third party inspection. We can also provide warranty to our customers to guarantee the quality.

Q: Where are the ports of shipment?
A: Tianjin, Xiamen, Ningbo or Shanghai port.

Q: How can I get the price of the required products?
A: If you can send us the material, size and surface, this is the best way so that we can produce it for you to check the quality. If you
still have any questions, please contact us and we will be happy to help you.

Q: What other products do you produce?
A: Stainless steel products, galvanized steel products, color coated products, alloy steel products, etc.

Material 1.4462
Type Seamless,Welded
Specification 3.0mm~1000.0mm
Section Shape Round,Square,Hexagonal,etc.
Technique Cold Rolled,Hot Rolled,Cold Drawn,etc.
Surface Brushed, Polished, Etched,etc.
Surface Finish 2B,BA,HL,NO.4,8K,Embossed,etc.
Processing Service Bending, Welding, Punching, Cutting, Moulding
Minimum Order Quantity Negotiable

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  • Tel:+86-15954941919
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  • Address:Liaocheng Economic and Technological Development Zone, Shandong Province, China

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