What is ASTM SA 193 grade B16?

What is SA 193 B16?

SA 193 B16 is a specification for high-temperature bolting materials, specifically alloy steel bolting materials, published by the American Society of Mechanical Engineers (ASME).

SA 193 B16 is made from chromium-molybdenum-vanadium alloy steel and is commonly used in applications that require high strength and resistance to corrosion, oxidation, and high temperatures.

SA 193 B16 stud bolts are often used in industries such as oil and gas, petrochemical, and power generation. They are used in applications such as pipeline flanges, valve bodies, pressure vessels, boilers, turbines, heat exchangers, reactors, and compressors.

The ASTM A193 specification, which SA 193 B16 is a part of, outlines the chemical composition, mechanical properties, and testing requirements for high-temperature bolting materials. This helps to ensure that the materials used in critical applications meet a certain level of quality and reliability.

SA 193 B16 mechanical properties, chemical composition, applications

SA 193 B16 is a chromium-molybdenum-vanadium alloy steel used in high-temperature and high-pressure applications such as pressure vessels, boilers, and flanges. The following are the mechanical properties and chemical composition of SA 193 B16:

Mechanical Properties:

• Tensile strength: 125 ksi (860 MPa) minimum
• Yield strength: 105 ksi (720 MPa) minimum
• Elongation: 16% minimum
• Reduction of area: 50% minimum
• Hardness: 35 HRC maximum

Chemical Composition:

• Carbon: 0.36% - 0.47%
• Manganese: 0.45% - 0.70%
• Phosphorus: 0.035% maximum
• Sulfur: 0.040% maximum
• Silicon: 0.15% - 0.35%
• Chromium: 0.80% - 1.15%
• Molybdenum: 0.15% - 0.25%
• Vanadium: 0.10% - 0.20%

Temperature Range

ASTM a193 grade b16 bolt temperature range is between -20ºF (-30ºC) to +1100ºF (+593ºC).

Thermal Expansion Coefficient

Co-efficient of thermal expansion for ASTM a193 grade b16 bolting is approximately 7.5 x 10^6.

Applications: SA 193 B16 stud bolts are commonly used in industries such as oil and gas, petrochemical, and power generation. They are used in applications that require high strength and resistance to corrosion, oxidation, and high temperatures. Some common applications of SA 193 B16 include:

• Pipeline flanges
• Valve bodies
• Pressure vessels
• Boilers
• Turbines
• Heat exchangers
• Reactors
• Compressors

It is important to ensure that any SA 193 B16 stud bolts being used meet the ASTM A193 specification and are installed and tightened according to the manufacturer's recommended torque specifications to ensure their performance and reliability.