What is ASTM A333 Gr 6? A333 Gr 6 vs A106 Gr B

ASTM A333 Gr 6 is a specific grade of low-temperature carbon steel (LTCS) pipe used in various industrial applications. It is a seamless and welded carbon and alloy steel pipe intended for use at low temperatures, typically above -50°F (-45°C). The “Gr 6” designation refers to the grade of steel, which meets the requirements of the ASTM A333 standard. In general, A333-6 pipes are manufactured in a size range from 1/2 inches to 24 inches.

This steel grade is commonly used in industries such as oil and gas, chemical, and power generation, where low-temperature service is required. The A333 Gr 6 steel is designed to withstand brittle fracture and has excellent impact toughness, making it ideal for use in cold environments up to a temperature of -45°C. For applications of A333-6 pipe material below -45°C, there will be a requirement for impact testing.

Information Required to Purchase A333-Gr 6 Pipe?

The following information shall be furnished while purchasing ASTM A333 Gr 6 pipe from any vendor.

• Pipe Quantity
• Manufacturing Process (Seamless or Welded)
• A333 Gr 6 Pipe Size and Wall Thickness
• End finish
• Any specific requirements like heat analysis, test reports, etc

Chemical Composition of ASTM A333-6 Material

ASTM A333 Gr 6 pipe material consists of the following alloying elements:

• Carbon: 0.3% Max
• Manganese: 0.29 to 1.06%
• Phosphorus: 0.025% Max
• Sulfur: 0.025% Max
• Silicon: 0.1% Min
• Nickel: 0.4% Max
• Chromium: 0.3% Max
• Copper: 0.4% Max
• Vanadium: 0.08% Max
• Columbium: 0.02% Max
• Molybdenum: 0.12% Max

Mechanical properties of A333 Gr 6 Pipe Material

A333-6 Pipe Material has the following mechanical properties:

• Minimum Tensile Strength: 415 MPa(60 ksi)
• Minimum Yield Strength: 240 MPa (35 ksi)
• Minimum Longitudinal Elongation in 2 inches (50mm): 30%
• Minimum Transverse Elongation in 2 inches (50mm): 16.5%

Differences between A106-B and A333-6 pipe material?

A106 Gr B and A333 Gr 6 are two different grades of carbon steel pipes that are designed for different applications. Here are some of the key differences between A106 Gr B and A333 Gr 6:

Temperature range: A106 Gr B pipes are designed to be used at high temperatures and pressures, while A333 Gr 6 pipes are designed for use at low temperatures.

Chemical composition: The chemical composition of A106 Gr B and A333 Gr 6 is only slightly different in terms of maximum values for elements like Phosphorus, Sulfur, Chromium, and Molybdenum. In A106-B material the maximum allowed range for these elements are slightly higher than that of A333-6 material.

Mechanical properties: The mechanical properties of the two grades are also the same. Both A106 Gr B and A333 Gr 6 have a minimum tensile strength of 60,000 psi and a minimum yield strength of 35,000 psi.

Manufacturing method: A106 Gr B pipes are typically manufactured by the seamless method, while A333 Gr 6 pipes can be made using either seamless or welded methods. This is the main major difference between A106-B and A333-6.

Overall, the choice between A106 Gr B and A333 Gr 6 will depend on the specific requirements of the application, particularly the temperature at which the pipe will be used.

A333-6 Pipe Manufacturers

There are many manufacturers of ASTM A333 Grade 6 pipe, but some of the biggest ones include:

• Nippon Steel & Sumitomo Metal Corporation
• ArcelorMittal
• JFE Steel Corporation
• Tenaris SA
• Vallourec SA
• Tubos Reunidos SA
• United States Steel Corporation
• TPCO Enterprise Inc.
• Maharashtra Seamless Ltd.
• China Zhonghai Steel Pipe Manufacturing Corporation.

It’s worth noting that this list is not exhaustive and there are many other reputable manufacturers of ASTM A333 Grade 6 pipe.

Here are some of the biggest manufacturers of ASTM A333 Grade 6 pipe from India:

• Maharashtra Seamless Ltd.
• Jindal Saw Ltd.
• ISMT Limited
• Mukat Pipes Limited
• Ratnamani Metals & Tubes Ltd.
• U.S. Metals
• Sandvik Materials Technology India Pvt. Ltd.
• Bhushan Steel Limited
• Lloyds Line Pipes Limited
• Tubacex India Pvt. Ltd.