Standard: ASTM, AISI, DIN, EN, GB, JIS
Technique: Hot Rolled/Cold Rolled/Galvnized
Processing Service: Welding, Punching, Cutting
Available Size Range: Click here
Get A QuoteChemical Composition
Stainless steel square tubing typically contains elements such as iron (Fe), chromium (Cr), nickel (Ni), and manganese (Mn). The chromium content is usually around 16% - 26%, which provides excellent corrosion resistance. Nickel is added to enhance ductility and toughness, and the amount can vary depending on the grade. Manganese helps in improving strength and workability. For example, in common 304 stainless steel square tubing, it approximately contains 18% - 20% chromium, 8% - 10.5% nickel, and about 2% manganese.
Mechanical Properties
• Tensile Strength: It ranges from around 515 MPa to over 800 MPa depending on the grade and heat treatment. For instance, 304 stainless steel square tubing generally has a tensile strength of about 515 - 620 MPa.
• Yield Strength: Varies from approximately 205 MPa to 310 MPa. In the case of 304 grade, it's around 205 - 210 MPa.
• Elongation: Can be in the range of 40% - 60%. This property indicates the material's ability to deform plastically before fracture.
Standard Specifications Table
| Country | Standard Specification |
| United States | ASTM A554 (covers welded stainless steel mechanical tubing, including square tubing, specifying dimensions, tolerances, and mechanical properties) |
| Europe | EN 10219-1 (defines requirements for cold formed welded structural hollow sections of non-alloy and fine grain structural steels, and also applicable to stainless steel square tubing in terms of general technical delivery conditions) |
| China | GB/T 12770 (specifies welded stainless steel pipes for mechanical structure, detailing aspects like chemical composition, mechanical properties, and dimensions for square tubing) |
Popular Grades
• Grade 304: It is the most widely used grade. It has good corrosion resistance, suitable for a wide range of applications from kitchen appliances to architectural decoration. It can withstand normal atmospheric corrosion and many chemical environments to a certain extent.
• Grade 316: Contains more molybdenum (Mo) compared to 304, which further enhances its corrosion resistance, especially in chloride-rich environments like coastal areas or chemical processing plants dealing with saltwater.
Popular Questions and Answers
Q1: Can stainless steel square tubing be used outdoors?
A: Yes, especially grades like 304 and 316. Grade 304 can handle normal outdoor weather conditions well, while 316 is even more suitable for harsh coastal or industrial outdoor environments due to its enhanced corrosion resistance.
Q2: How do I cut stainless steel square tubing?
A: It can be cut using a variety of methods. For thinner tubing, a hacksaw or a tubing cutter can be used. For thicker sections, power tools like an angle grinder with a cutting disc or a bandsaw are more appropriate. It's important to use the right cutting tools and techniques to ensure a clean cut and avoid excessive heat generation that could affect the material properties.
Q3: What is the difference between seamless and welded stainless steel square tubing?
A: Seamless tubing is made from a solid billet and has no weld seam. It generally has better pressure-bearing capacity and is often used in high-pressure applications. Welded tubing is formed by welding a strip of stainless steel into a tubular shape. It is more cost-effective and suitable for many general structural and non-critical pressure applications where the advantages of seamless tubing are not essential.
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