Taking materials to the extreme

We offer five main OCTG grades with a dimensional range of 2 3/8" up to 7 3/4" (60 - 200 mm OD). This includes two unique materials: Sanicro® 29, a highly alloyed austenitic steel; and Sandvik SAF 3207 HD™, our hyper-duplex stainless steel.

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Our duplex family is optimized for high yield strength (enabling lighter constructions) and corrosion resistance at low to moderate temperatures. Sanicro® 28 and Sanicro® 29 grades are for corrosive environments at higher temperatures.

Our Sanicro® 28 is excellent at combating corrosion in hot downhole environments with high partial pressure of H2S and high chloride content. Now, our next generation Sanicro® 29 takes this to an even higher level.

Figure 1. Critical pitting temperature (CPT) as a function of chloride concentrations for cold worked Sanicro 29 and Sanicro 28. The potential was +600 mV vs. SCE.

Figure 1. Critical pitting temperature (CPT) as a function of chloride concentrations for cold worked Sanicro® 29 and Sanicro® 28. The potential was +600 mV vs. SCE.

As shown, Sanicro® 29 is a superior choice for environments containing a mix of very high chloride concentrations and high partial pressures of H2S. For very hot and sour wells, this corrosion-resistant alloy also provides even better resistance to localized corrosion and sulfide stress cracking than Sanicro® 28. Both materials are cost-efficient alternatives to higher alloyed OCTG products.

Our products for Oil and gas upstream

Downhole casing and production tubing in CRA (corrosion resistant alloys) such as duplex stainless steels and nickel alloys. These materials are ideal to cope with the aggressive environments found in wells sour from hydrogen sulphide, carbon dioxide and other chemicals.