302 Stainless Steel 302 Stainless Steel Stainless Shapes is an experienced supplier of 302 stainless steel. 302 Stainless is arguably the most common stainless steel on the market. 302 has several similarities to 304 stainless steel. Except with a higher carbon count than 304, the 302 remains just as versatile a stainless steel out there. Often it is used in strip and wire format with high toughness and comparable corrosion resistance. However, this stainless steel is not hardened by heat treatment. The 302 stainless steel is usually annealed in addition to its easy fabrication and formability. Features Corrosion Resistance – 302 stainless steel provides useful resistance to corrosion in a wide range of moderately oxidizing to moderately reducing environments. The alloys are used widely in equipment and utensils for the processing and handling of food, beverages, and dairy products. Heat exchangers, piping, tanks, and other process equipment in contact with fresh water also utilize these alloys. Also, a large variety of applications involves household and industrial chemicals. The 18 to 19 percent of chromium that these alloys contain provides resistance to oxidizing environments such as dilute nitric acid. These alloys are also resistant to moderately aggressive organic acids. For example, acetic and reducing acids such as phosphoric. The more highly reducing environments, such as boiling dilute hydrochloric and sulfuric acids, are shown to be too aggressive for these materials. Corrosion Cracking – 302 is the most susceptible of the austenitic stainless steels to stress corrosion cracking in halides. This is because of its relatively low nickel content. Stresses may result from cold deformation of the alloy during forming, or from roller expanding tubes into tube sheets, or from welding operations. This is because it produces stress from the thermal cycles used. Stress levels may be reduced by annealing or stress-relieving heat treatments following deformation, thereby reducing sensitivity to halide stress corrosion cracking. Welding – All austenitic stainless steels are considered to be the most weldable of the high-alloy steels. This is why they can be welded by all fusion and resistance welding processes. Not Sure What You’re looking for? Contact us today if you are unsure of what you are looking for. Stainless can be a tricky business to deal with unless you have the right experts to speak with. Our salesmen are on the line in Florida and Illinois, and they are ready to answer your calls and get you up and running with your stainless of choice. If you have any questions about our product line, our company, or what kind of stainless steel will go best with the job you need to be done, give us a call today at (800) 748-9811 Furthermore, for a prompt and accurate quote, call us today. Call - 800-748-9811 Frequently Asked Questions Which is better 302 or 304 stainless steel? + In most applications, 304 and 302 are virtually interchangeable -- 302 has slightly higher carbon content (0.15% max vs. 0.08% max for 304), giving it a marginally higher work-hardening rate. Modern specifications have largely replaced 302 with 304 in flat-rolled products. For spring wire and cold-drawn wire applications, 302 remains the standard specification. Will a magnet stick to 302 stainless steel? + Yes, Grade 302 is an austenitic stainless steel and is generally non-magnetic in the annealed condition. Cold-drawn 302 wire may show slight magnetism due to deformation-induced martensite, which is exploited in spring wire applications. What is the strongest grade of stainless steel? + Among conventional stainless grades, precipitation-hardening grades like 17-4 PH H900 are the strongest. For grade 302 specifically, cold-drawn spring wire achieves tensile strengths of 200-300 ksi depending on diameter -- far higher than annealed sheet or bar. What are the 4 types of stainless steel? + The four main stainless steel types are austenitic, ferritic, martensitic, and precipitation-hardening. Grade 302 is austenitic. What is a 302 stainless steel equivalent to? + Grade 302 is equivalent to UNS S30200 and EN 1.4319. In wire and spring applications, ASTM A313 Type 302 remains a common specification. For flat products (sheet, plate) it has been largely superseded by 304 in most modern standards. What's stronger than 304 stainless steel? + Grades stronger than 304 (and 302) in terms of tensile strength include 17-4 PH (precipitation-hardening), duplex 2205 (higher yield strength), Nitronic 50 (double the yield strength of 304), and cold-worked grades. All significantly outperform annealed 304/302. Is 302 stainless steel medical grade? + Grade 302 is not typically classified as medical grade. Medical-grade stainless steel usually refers to 316L or 17-4 PH (for orthopedic implants) or 303 (for surgical instruments). Grade 302 is more commonly used in springs, screens, and fasteners. What is stronger, 304 or 316 stainless? + Grade 316 has better corrosion resistance than 302 in chloride and marine environments due to its molybdenum content. In terms of mechanical strength, both are austenitic with similar annealed properties, though 302 work-hardens slightly faster due to higher carbon. Can 302 stainless steel be hardened? + Grade 302 cannot be hardened by conventional heat treatment -- it is austenitic and non-hardenable by quenching. However, it can be significantly strengthened by cold working. 302 spring wire is cold-drawn to very high tensile strengths (200+ ksi) through this process. What's more expensive, 304 or 316? + Grade 316 is more expensive than 302 (or 304) due to its molybdenum and additional nickel content. The 302/304 alloys contain no molybdenum and have lower nickel levels, making them the most economical austenitic grades. Pricing varies by product form and quantity.
