Alloy Metals and Tubes International

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Frequently Asked Questions

What is the difference between 316L tubing and 317L tubing?
317L contains more Chrome, Nickel and Molybdenum than 316L, which increases the corrosion resistance.

What is 6-Moly tubing?
6-Moly or 6Moly is common industry language for alloys whose chemistry contains a minimum of 6% Molybdenum. The stainless steel grade UNS S31254 meets this condition. It is known as 254SMO when produced as a seamless tube, and AL6XN when produced as a welded tube.

What is Tungum tubing?
Tungum is a bronze copper alloy with excellent corrosion resistant properties.

What is the difference between 2205 Duplex and 2507 Super Duplex?
The main difference is that 2507 contains more Chrome, Nickel and Molybdenum, which makes it more corrosion resistant.

Why choose Nitronic 50 over Beryllium Copper for MWD tools?
Nitronic 50 provides extended life on tools and is more cost effective due to yield strengths up to 15% higher than BeCu, better safety without the worry of Chronic Beryllium Disease, and cheaper manufacturing costs.

What does the ‘L’ stand for in 316L/317L/904L?
The ‘L’ stands for LOW CARBON. Standard 316 for example contains a CARBON MAX 0.08, while 316L contains a CARBON MAX of 0.035. L grades are more suitable for welding due to the lowered carbon content.

What is a PREN number?
The pitting resistance equivalent number (PREN) is a measurement used to predict the corrosion resistance of various types of stainless steel.
[PREN FORMULA]: PREN = 1 x %Cr + 3.3 x %Mo + 16 x %N