Specialty Materials

GH USA Valve Co., has extensive knowledge of materials considered specialty for the oil and gas industry. With our experience in producing valves and fittings in these materials you can rest assured that GH can produce the valves you need in these materials.

Monel K500

MONEL® alloy K-500 (UNS N05500/ W.Nr. 2.4375) is a nickel-copper alloy which combines the excellent corrosion resistance of MONEL alloy 400 with the added advantages of greater strength and hardness. The increased properties are obtained by adding aluminum and titanium to the nickel-copper base, and by heating under controlled conditions so that submicroscopic particles of Ni3 (Ti, Al) are precipitated throughout the matrix. The thermal processing used to effect precipitation is commonly called age hardening or aging. Typical applications for MONEL alloy K-500 products are chains and cables, fasteners and springs for marine service; pump and valve components for chemical processing; doctor blades and scrapers for pulp processing in paper production; oil well drill collars and instruments, pump shafts and impellers, non-magnetic housings, safety lifts and valves for oil and gas production; and sensors and other electronic components.

Alloy 20

Alloy 20 is a nickel–chromium–molybdenum stainless steel alloy developed for applications involving sulfuric acid. Its corrosion resistance also finds other uses in the chemical, food, pharmaceutical, power generation, and plastics industries. Alloy 20 resists pitting and chloride ion corrosion and its copper content protects it from sulfuric acid. Alloy 20 is not a stainless steel but a nickel alloy (ASTM). Alloy 20 is often chosen to solve stress corrosion cracking problems, which may occur with 316L stainless.

Inconel 625

INCONEL® nickel-chromium alloy 625 (UNS N06625/W.Nr. 2.4856) is used for its high strength, excellent fabricability (including joining), and outstanding corrosion resistance. Service temperatures range from cryogenic to 1800°F (982°C). The properties of INCONEL alloy 625 that make it an excellent choice for sea-water applications are freedom from local attack (pitting and crevice corrosion), high corrosion-fatigue strength, high tensile strength, and resistance to chloride-ion stress-corrosion cracking.

F51 Duplex

F51 is a duplex stainless steel with a 50:50 austenite, ferrite microstructure. The material combines good mechanical
strength and ductility with moderate to good corrosion resistance in a variety of environments. This material is generally supplied in the annealed condition giving yield strengths in excess of 65 KSI (450Mpa), this
material cannot be hardened by heat treatment but stronger surface strengths can be achieved by cold working.
Typical applications include pumps, valves, pipework, flanges etc together with various applications in the oil and
gas, brewing, power generation and chemical engineering industries. In fact this alloy can be used successfully as an
alternative to 300 series austenitic stainless steels in almost all applications where higher mechanical strength/lower
weight is required.

Alloy 321

Alloy 321 (UNS S32100) is a titanium stabilized austenitic stainless steel with good general corrosion resistance. It has excellent resistance to intergranular corrosion after exposure to temperatures in the chromium carbide precipitation range of 800 –1500°F (427– 816°C). The alloy resists oxidation to 1500°F (816°C) and has higher creep and stress rupture properties than alloys 304 and 304L. It also possesses good low temperature toughness.

Monel K400

MONEL® nickel-copper alloy 400 (UNS N04400/W.Nr. 2.4360 and 2.4361) is a solid-solution alloy that can be hardened only by cold working. It has high strength and toughness over a wide temperature range and excellent resistance to many corrosive environments. Alloy 400 is widely used in many fields, especially marine and chemical processing. Typical applications are valves and pumps; pump and propeller shafts; marine fixtures and fasteners;

A350 LF2

ASTM A350 Grade LF2 is a general Carbon steel usually supplied in the Normalised, Normalised and Tempered or Quench and Tempered condition. It is typified by having moderate strength and impact toughness and is used extensively for the manufacture of flanges and fittings, and applications which require cold temperature service where corrosion resistance is not important.

Hastealloy C276

In aggressive/corrosive service, when nothing else works, many industries have traditionally turned to HASTELLOY® C-276 alloy. Many years of outstanding performance in a variety of industrial applications have confirmed the advantages of using the alloy. Materials engineers in the chemical processing and other industries have grown accustomed to specifying its high performance based on laboratory testing, field trials and prior experience.

B148

The aluminum bronzes are a family of copper-based alloys offering a combination of mechanical and chemical properties unmatched by any other alloy series. Excellent corrosion resistance, especially in seawater and similar environments, where the alloys often outperform many stainless steels. High hardness and wear resistance, providing excellent bearing properties in arduous applications. Favorable high temperature properties, for short or long term usage.