321 stainless steel bar

What is the difference between duplex and super duplex?

November 19, 2023 No Comments

Stainless steels are segregated into various classes, mainly due to the distinction in their microstructural phases. While each class has a distinct microstructural phase, stainless steels that belong to the duplex category have a microstructure that is similar to two other classes, i.e. – ferritic and austenitic stainless steel. Duplex stainless steels contain a mixed microstructure with austenite and ferrite. The ratio of both these crystalline structures is in an equivalent ratio, which means that duplex steels contain both austenite and ferrite in a 50% ratio. Duplex stainless steels may further be divided into three additional subcategories, one of which is a super duplex stainless steel. This is why super duplex grades also have a dual microstructure. Duplex grades have very high PREN or pitting

What is the difference between a2 and a4 stainless steel fasteners?

November 5, 2023 No Comments

Difference between a2 and a4 stainless steel fasteners Fasteners in grades A2 and A4, tend to be amongst the most popular ones across global markets. Grade A2, or as commonly known as stainless steel 304 is highly valued for its economical cost and delivering a good performance. Likewise, grade A4, or as known as grade 316 is referred to as marine grade stainless steel. Due to its resistance to seawater and brine solutions, A4 screws work well in marine engineering applications. These fasteners are also resistant to salt spray, which is common in the shipping industry. Although in terms of popularity and availability, it is grade A2 that ranks first, the corrosion resistance and the mechanical strength of A4 supersedes the former, making it a

What is the difference between 316 and 316l?

October 6, 2023 No Comments

There are several stainless steel grades, which are classified into four major categories. One of the most important categories is austenitic stainless steel. The austenitic stainless steel alloys are further put into several groups based on their chemical composition. One of the most highlighted stainless steel grades belongs to the 300 series. These grades are very versatile and their utility covers several areas, including shipping, marine engineering, general engineering, the petrochemical industry as well as the pharma and food sectors. This being said, grade 316 is the second most used alloys amongst the 300 series. Like most austenitic stainless steel alloys, grade 316 is modifiable. Modifications for stainless steels tend to be on the basis of their application. Generally, the modifications are minor additions or

Effect of forging process on microstructure and properties of 2219 aluminum alloy flange

October 4, 2023 No Comments

In order to solve the problems of 2219 aluminum alloy flange forgings, such as coarse grain, vertical fiber direction and structural stress direction, the effect of forging process on its structure and properties was studied by means of room temperature tensile test and optical microscope. The results show that the single upsetting process has little effect on the structure and properties; The multi-directional forging process can effectively break the fiber structure of the bar and reduce the anisotropy of the forging. For all kinds of forging processes formed at one time under high temperature, the grain size of forgings reaches millimeter level; When the deformation is finished at a lower final forging temperature, the microstructure of the forging can be significantly refined and homogenized; The 2219 aluminum alloy

What are flange gaskets?

September 26, 2023 No Comments

Gaskets are sealing elements installed between mating flange faces. The compressive force applied when flanges are mated (due to bolt torqueing) keeps the gasket in position between the two flanges. Flange gaskets are split into three main categories. Non-metallic / Soft – Compressed non-asbestos fibre (CNAF), PTFE, rubber, ceramic fibre. Metallic / Hard – oval ring, octagonal ring. Semi-metallic / Composite – spiral wound, metal jacketed, camprofile. Flange Types Are you enjoying this article so far? Then be sure to check out our Flange Fundamentals Video Course. The course has over five hours of video content, a 52 page colour illustrated handbook (this article is an extract from the handbook), a quiz, and you will receive a certificate of completion when you finish the course. Enjoy! Soft Gaskets Soft gaskets (non-metallic gaskets) have a large contact sealing area and are suitable for low pressure applications only. The

P304/TP316L Seamless Stainless Steel Sanitary Tubing For Food Using

September 18, 2023 No Comments

P304/TP316L Seamless Stainless Steel Sanitary Tubing FOB PriceUSD 500 – 30,000/Piece PortNingbo or Shanghai Port MOQ1 Piece Supply Ability1000 Tons Per Month Payment TermsL/C,T/T,Western Union,MoneyGram PackagingSeaworthy plywood cases or pallets Delivery2 – 15 days Detailed description Quick Detail: Name: TP304/TP316L Seamless Stainless Steel Sanitary Tubing For Food Using Place of Origin:XI’AN, China (Mainland) Brand Name: JIADE Shape: Stainless Steel Sanitary Tubing Material: Stainless Steel Steel Grade: TP304/TP304L/TP316L/TP304H/TP347H … Packaging & Delivery Packaging Detail: according to customer’s require or export’s standard Delivery Detail: 2 – 15 days after confirmation Specifications: Stainless Steel Sanitary tubes 1.Standard: ASTM A270 & DIN11850: 2.Materials: TP304/TP304L/TP316L/TP304H/TP347H. 3.Size: OD 10mm to 89mm. Thickness: from 0.25 – 3.0mm, Other specificatio.ns are welcome from your request. 4.Finishing: annealed, pickled, polished inside and outside