SUS431 Stainless Steel Tube DIN 1.4057 1Cr17Ni2 X17CrNi16-2 Stainless Steel

Product Specification

 SUS431 Stainless Steel Tube DIN 1.4057 1Cr17Ni2 X17CrNi16-2 Stainless Steel Seamless Pipe

Product Overview

Product Definition:

Stainless steel pipes and tubes are hollow, long-length products manufactured from stainless steel through seamless (extruded from solid billet) or welded (roll-formed and welded) processes. The material contains a minimum of 10.5% chromium, which forms a passive oxide layer providing excellent corrosion resistance across a wide range of environments.

Pipe vs Tube – Key Differences:

Note: In common trade language, “pipe” and “tube” are often used interchangeably. We supply both – please specify your required standard.

Key Characteristics:

Classification by Manufacturing Method:

Typical Applications by Industry:

Our 431 stainless steel pipe, also known as 1Cr17Ni2 small - diameter seamless steel pipe, is a high - quality product crafted by Wuxi Weiman Gaodeng Special Steel Co., Ltd. Since its establishment in 2017, our company has been dedicated to the production of stainless steel, alloy steel pipes, nickel - based alloys, and titanium alloys. With an annual export volume ranging from US$5 Million to US$10 Million, we have established a strong presence in multiple international markets including North America, South America, Eastern Europe, Southeast Asia, Africa, Oceania, Mid East, Eastern Asia, Western Europe, Central America, Northern Europe, Southern Europe, South Asia, as well as the domestic market.

Pipe Design and Dimensions

• Shape: The pipe has a round shape, which is one of the most common and practical shapes for fluid transportation and structural applications. The round cross - section provides uniform stress distribution, ensuring the pipe can handle internal and external pressures evenly.
• Small - Diameter: Our small - diameter seamless steel pipes are available in a variety of sizes to meet different customer requirements. The small diameter makes them suitable for applications where space is limited, such as in precision machinery, instrumentation, and small - scale fluid systems.
• Seamless Construction: The seamless design of the pipe eliminates the weak points associated with welded joints. This results in a stronger and more reliable pipe that is less prone to leakage and failure. The seamless construction also provides a smooth inner surface, reducing fluid friction and improving the flow efficiency of the pipe.

Material Characteristics

• Composition: The 431 stainless steel, or 1Cr17Ni2, is a martensitic stainless steel. It contains approximately 16 - 18% chromium (Cr) and 1.5 - 2.5% nickel (Ni). The chromium content provides excellent corrosion resistance, forming a passive oxide layer on the surface of the pipe that protects it from rust and other forms of corrosion. The nickel enhances the toughness and ductility of the steel, making the pipe more resistant to cracking under stress.
• Strength: This type of stainless steel offers high strength and hardness. It has good mechanical properties, allowing it to withstand high - pressure applications. The martensitic structure of the steel contributes to its superior strength, which is ideal for use in environments where the pipe may be subjected to heavy loads or pressure.
• Heat Resistance: The 431 stainless steel pipe can maintain its mechanical properties at elevated temperatures. It has a relatively high melting point and can resist oxidation and scaling at high - temperature conditions. This makes it suitable for applications in industries such as heat treatment, power generation, and chemical processing.
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Frequently Asked Questions (FAQ)

Q1. What products do you mainly supply?

We mainly supply stainless steel (410 420 431 630  pipes), carbon steel, silicon steel, copper, aluminum, and other materials in sheets, pipes, and coils. Customized processing services are also available.

Q2. Do you have stock available?

Yes, we maintain sufficient stock for most standard specifications. For non-standard sizes, we can accept orders with reasonable lead time.

Q3. Can you provide MTC (Mill Test Certificate)?

Yes, we provide MTC for every shipment. Third-party inspection (SGS, TÜV, BV, etc.) is also available upon request.

Q4. Do you support video inspection before shipment?

Yes, we fully support video inspection. You can also arrange an agent or third party to visit our factory for on-site inspection before shipment.

Q5. What are your main export markets?

We export to Southeast Asia, the Middle East, Europe, Africa, and South America. We have rich experience in international trade and export documentation.

Q6. What payment terms do you accept?

We accept T/T (wire transfer), L/C at sight (irrevocable), and sometimes a combination of T/T deposit + L/C balance. Payment terms are negotiable based on order size and customer history.

Q7. Can you provide samples?

Yes, samples are available for most standard products. For custom sizes, we may need to produce small batch samples. Sample cost and shipping are usually borne by the customer, but can be discussed.

Q8. What is your typical lead time?

For stock items: 7–10 days after order confirmation. For custom production: 20–30 days, depending on the specification and quantity.

Q9. What quality certifications do you have?

We provide MTC with every shipment. Our partner mills are ISO9001 certified. We can also assist with third-party inspections (SGS, TÜV, BV) upon request.

Q10. How can I get a quotation?

Please send us your material grade, specification (size, thickness, length), quantity, and preferred trade term (FOB, CIF, DAP, etc.). We will reply with a detailed quotation within 24 hours.