Type 304 Stainless Steel and Type 304L Stainless Steel

Stainless Steel Grade 304 / 304L | UNS S30400 / UNS S30403 | 1.4301 / 1.4307

These types of steel are some of the most regularly specified and have come to represent the embodiment of the basic stainless product. They are part of the 300 Series of steels which covers a range of austenitic chromium-nickel alloys. They are also known as 18/8 stainless due to their chemical composition which includes approximately 18% chromium and 8% nickel by weight. The steels are easy to form, weld, and fabricate and their resistance to corrosion from, amongst other things, acids naturally contained in food has resulted in them being used widely in the food and drink processing industries.

Type 304 Stainless Steel and Type 304L Stainless Steel have very similar chemical and mechanical properties and are often included on a single material test certificate when the actual properties of stainless steel flanges meet the criteria of both types. This is a very common occurrence. Type 304L Stainless Steel is a variation of Type 304 Stainless Steel and has a lower carbon content which improves weldability and lowers the risk of reduced corrosion resistance around the weld. Type 304L Stainless Steel also has a slightly lower yield and tensile strength than Type 304 Stainless Steel.

As with most steel plate products a number of different designations are used for these steels. The most common are:

• Type 304              1.4301 (EN Steel Number)            S30400 (UNS) 
• Type 304L            1.4307 (EN Steel Number)            S30403 (UNS)

Typical chemical and mechanical properties of Type 304 Stainless Steel and Type 304L stainless steel:

Typical industrial sectors:

• Food Processing
• Chemical Industry
• Brewing
• Pharmaceuticals
• Petrochemicals

Typical product applications:

• Heat Exchangers
• Stainless Steel Pipes
• Pressure Vessels
• Stainless steel flanges
• Stainless steel pipe fittings
• Valves
• Pipelines.

Contact Yaang Pipe Industry’s specialist stainless steel team for all sales and technical enquiries.

Yaang Pipe Industry Co., Limited

Established in 2008, Yaang Pipe Industry Co., Limited is a professional organizer and one-stop-shop supplier for steel piping system products, including stainless steel pipes and stainless steel tubes, stainless steel flanges and stainless steel butt-welding pipe fittings, stainless steel pipe fittings, stainless steel elbow, stainless steel tee, stainless steel reducer,stainless steel stub end, stainless steel gaskets, stainless steel fasteners, stainless steel valves, Sanitary Services etc. in China. We have devoted to providing the best solutions of steel materials and industrial equipment for our respected customers.

We supply not only commonly used stainless steel materials (SS304/L,SS316/L,SS321), but also duplex and super duplex steel 1.4547, 1.4462, 1.4410 (S31254,S31803,S32750,S32760), special austenite stainless 310S, 347H, 317L, 904L... Yaang productsincluding super duplex stainless steel flanges, duplex stainless steel pipe fittings and duplex stainless steel flanges are widely used in Shipbuilding, Nuclear power, Marine engineering, Petroleum, Chemical, Mining,Sewage treatment, Natural gas and Pressure vessels and other industries.

Source: Yaang

For more information on this source please visit: Yaang Pipe Industry Co., Limited .