Source: https://tbxnexxia.com/octg-solutions/materials-sizes-grades/

> Duplex, super duplex, nickel alloys and advanced stainless steels.

[OCTG Solutions](https://tbxnexxia.com/octg-solutions/) Materials, Sizes & Grades

# Materials, Sizes & Grades

A family of Corrosion-Resistant Alloys for high-pressure, high-temperature and sour wells.

Explore the grades

Metallurgical solutions designed to optimize operational uptime, ensure safety and mitigate environmental risks in the industry's most challenging wells.

As the energy sector demands greater reliability in increasingly complex environments, we focus on high-pressure, high-temperature (HPHT) and sour wells containing high levels of hydrogen sulfide (H₂S) and carbon dioxide (CO₂). Our proprietary alloys integrate chromium and nickel to maximize resistance to oxidation, humidity and chemical wear.

60 years of experience in the Oil & Gas market

15 CRA grades, from duplex to nickel-base alloys

65 to 160 ksi yield strength

2⅜ ″ to 9⅝ ″ OD size range

Material selection

## The right alloy for every well condition

Corrosion resistant alloys for critical well conditions combining high concentrations of chlorides, H₂S and CO₂, low pH and the presence of free sulphur.

Duplex

Superduplex

Alloy 28

Alloy 825

Alloy G3*

Alloy G50*

Alloy C276

Austenitic-ferritic Providing optimized mechanical strength and crack resistance.

Superaustenitic Superior protection against localized pitting and chloride stress corrosion.

Austenitic Ni-base Delivering maximum thermal stability and resistance in highly acidic media.

Increasing H₂S, CO₂, chlorides and temperature

* Positive results in presence of free sulphur.

Grades

## Find the right grade

Our technical team will recommend the best metallurgy based on your well operating environment.

Duplex

### TX22

- **Microstructure**: Austenitic-ferritic

- **UNS Number**: S31803

- **Min. yield strength**: 65 / 125 ksi

- **OD size range**: 2-3/8" – 9-5/8"

Superduplex

### TX25HP

- **Microstructure**: Austenitic-ferritic

- **UNS Number**: S32750

- **Min. yield strength**: 80 ksi

- **OD size range**: 2-3/8" – 9-5/8"

Superduplex

### TX25NP

- **Microstructure**: Austenitic-ferritic

- **UNS Number**: S32750

- **Min. yield strength**: 125 ksi

- **OD size range**: 2-3/8" – 9-5/8"

Alloy 28

### TX28

- **Microstructure**: Superaustenitic

- **UNS Number**: N08028

- **Min. yield strength**: 110 / 125 ksi

- **OD size range**: 2-3/8" – 9-5/8"

Alloy 825

### TX825

- **Microstructure**: Austenitic Ni-base

- **UNS Number**: N08825

- **Min. yield strength**: 110 / 125 ksi

- **OD size range**: 2-3/8" – 7-5/8"

Alloy G3

### TXG3

- **Microstructure**: Austenitic Ni-base

- **UNS Number**: N06985

- **Min. yield strength**: 110 / 125 ksi

- **OD size range**: 2-3/8" – 7-5/8"

Alloy G50

### TXG50

- **Microstructure**: Austenitic Ni-base

- **UNS Number**: N06950

- **Min. yield strength**

- **OD size range**

Alloy C276

### TXC276

- **Microstructure**: Austenitic Ni-base

- **UNS Number**: N10276

- **Min. yield strength**

- **OD size range**

Track record

+ 70,000 tons

of CRA OCTG delivered in the last years to Oil & Gas global leaders.

OCTG Solutions

## Explore the complete solution

[View all OCTG Solutions](https://tbxnexxia.com/octg-solutions/)

[SENTINEL® Premium Connections Premium connection technology for CRA OCTG in critical wells.](https://tbxnexxia.com/octg-solutions/sentinel-premium-connections/) [Services From material selection to running supervision in the field.](https://tbxnexxia.com/octg-solutions/services/)

Technical support for product selection

## The right material starts with the right metallurgy.

For additional information please contact our technical team.

[Technical support](https://tbxnexxia.com/contact/#support)[Contact form](https://tbxnexxia.com/contact/#form)