Tri-Round - Model ASTM A276 AISI 303 -Stainless Steel Bar

Backed by rich industry experience, Triroundbars.com is presenting a large array of Stainless Steel 303 Round and Flat Bars. ASTM A276 303 SS Rod is widely used in various industries for various purposes. Our range of UNS S30300 Hex and Square Bars is manufactured by our experts in the manufacturing units, using high-quality raw materials to suit the requirements of our valuable clients. 

Additionally, all Grade 303 Bars and Rods undergo a series of practical tests to ensure their durability.However, the corrosion resistance of this alloy grade is generally lower than that of grade 304. Even though sulphur improves machinability, it also results in certain drawbacks in the ASTM A479 UNS S30300 hex bar. First, the alloy’s corrosion resistance is reduced. Second, its toughness is slightly reduced. 

Furthermore, those regions in the microstructure of astm a276 type 303 flat bar which contain sulphur act as initiators for corrosion by means of pitting. But for both intermittent and continuous use, the alloy exhibits good resistance to oxidation, up to temperatures 927°C. Yet, manufacturers do not recommend using the JIS SUS 303 black bar at temperatures exceeding 760°C, solely because of higher carbon content, promoting carbide precipitation.

A The result is irregular scaling on the 303 stainless steel rod. Generally, lower carbon-containing alloys are resilient to becoming susceptible to sensitisation, unlike the 303 stainless steel welding rod. While welding this material is not recommended, it is a task that could be undertaken by welding the AISI 303 threaded bar with the aid of electrodes produced in stainless steel grade 310. 

The result is irregular scaling on dissolution of carbide precipitates and achievement of a high machining rate, with the hardness property of the ss 303 bright bar valued between a range of 200 to 240 Brinell.

SS 303 Round Bars are generally used in automatic screw machines when wide-ranging machining is required. Due to the high quality of raw materials, we also offer these UNS S30300 Round Bars (also known as W NR 1.4305 Bars) in custom sizes and thicknesses as per specific demands of our esteemed clients at market leading prices.

Unlike austenitic grade 304, stainless steel 303 contains sulphur or selenium. The addition of element sulphur is referred to as stainless steel 303, but the addition of element selenium is referred to as 303se, indicating that the metal has been alloyed with selenium. 

Using either of these two elements, the WNR 1.4305 square bar has been optimised for machinability. Therefore, if superior machinability properties are required, this alloy is the best choice. Additionally to improved machinability, 303 Steel Cold Finished Bars have superior galling characteristics.

This alloy grade, however, tends to have a lower corrosion resistance than grade 304. The addition of sulphur improves the machinability of the ASTM A479 UNS S30300 hex bar, but it also causes certain drawbacks. The alloy becomes less corrosion-resistant. In addition, its toughness properties are slightly reduced.

In addition, sulphide-containing regions in the microstructure of astm a276 type 303 flat bars act as corrosion initiators by pitting. For both intermittent and continuous use, the alloy exhibits good oxidation resistance up to 927°C. The JIS SUS 303 black bar, however, is not recommended for use at temperatures exceeding 760°C because of its high carbon content, which promotes carbide precipitation.

A This causes irregular scaling in the 303 stainless steel rod. Contrary to the 303 stainless steel welding rod, lower carbon-containing alloys are less susceptible to becoming sensitised. Welding this material is not recommended, however it can be achieved by welding AISI 303 threaded bars with the aid of electrodes produced in stainless steel grade 310. Anodizing of this alloy offers its benefits including the dissolution of carbide precipitates and a high machine rate, with the hardness property of SS 303 bright bars being between 200 and 240 Brinell.

Alloy description

Stainless steel alloy 303 is an authentic, nonmagnetic stainless steel that is not hardened by heat treatment. The stainless steel alloy contains 18% chromium and 8% nickel. Due to the presence of sulphur, sulphur-containing alloys are readily machinable. The alloy is designed to improve machinability while maintaining good mechanical and corrosion resistance properties. It is extremely tough. The following are some of the features that make round bars the most preferred product among different industries:

• Corrosion resistibility
• Heat corrosion resistance ability
• Highly ductile
• Good weldability property
• High tensile strength
• Durable in nature

Quality assurance

Each stage of the manufacturing process is checked for quality by our hired personnel. The quality of the product depends on the demands of the customer and on the guidelines by which the round bars are manufactured.

The manufacturing process of the round bars

AISI 303 Stainless Steel Round Bars are manufactured by gathering suitable raw materials from reliable market vendors. After the alloy and the raw material are collected, they are tested and checked before going into the manufacturing process. Bar’s ranges are maintained according to national and international quality standards and appropriate manufacturing standards. Furthermore, these bars undergo multiple stages of manufacturing to maintain their smoothness and thickness. Under the strict supervision of the hired experts who are masters of the stainless steel round bar manufacturing process, the manufacturing process is carried out. They supervise the employees in maintaining the quality of the bars in order to achieve the organisation’s goals.

Material testing

Before dispatching the products from the manufacturing unit, many tests are performed. Among them are:

• Mechanical test
• Chemical test
• Positive material identification test
• Micro and macro test
• Pitting resistance test
• Third party inspection
• Visual inspection

Test certifications

We provide our customers with the good quality of the product along with the test certificates that increase the sales of our product. The test certificates provided are-

• Raw material certificate
• 100% radiography test
• Third party inspection statement

These certificates are given in accordance with the EN 10204/ 3.1.

Documentation of AISI 303 Stainless Steel Round Bars

Along with the manufactured goods various documents are attached for the doubt clearance of the clients. The documents are-

• Commercial invoice
• Guarantee letter of the company
• Chemical test report
• Mechanical test report
• Visual inspection statement
• Packaging list

Packaging of the round bars

The AISI 303 Stainless Steel Round Bars are wrapped in plastic bags to withstand extreme weather conditions. To prevent the bars from getting damaged during the time of shipment the round bars are packed in the wooden boxes, wooden crates, and wooden pallets. All the shipment documents along with the product description are attached with the wooden boxes. We ensure our clients the fast and safe delivery of the product.