Langley Alloys Ltd.
About us
Langley Alloys supplies high-performance alloys as bars, plates, pipes and fittings on a worldwide basis from our sites in the UK and USA. We stock duplex and super duplex grades S32205, S32750, S32760 and Ferralium 255, plus the nickel-based alloys 625, 725, 825, 925, 718 and K500, along with Nit50/60 stainless steels and our unique cupronickel Hiduron 130. We also offer inspection, testing and machining services with our qualified in-house team.
Products & services
Ferralium 255-SD50
Ferralium 255 is a super duplex stainless steel in the Ferralium family. It was the first commercial grade of super duplex stainless steel. Developed by Langley Alloys in the 1960's, and subsequently refined, to meet the needs of the oil, gas and chemical industries, Ferralium 255 achieves higher strengths than most other stainless steel varieties and corrosion-resistant alloys. It is resistant to chloride SCC, as well as crevice corrosion and pitting.
Hiduron 130
Hiduron® 130 is a high-strength cupronickel supplied in the hot worked condition. Aluminium is the alloys key strengthening element through the formation of finely dispersed ϒ’ nickel aluminium precipitate, strengthening the alloy in a similar way to Alloy K500. As these precipitates are formed through a carefully controlled forging process, naturally aged during cooling, no further heat treatment is necessary, making it one of the highest strength copper alloys commercially available. Being a cupronickel, Hiduron® 130 has excellent resistance to corrosion by seawater, marine and industrial atmospheres as well as being highly resistant to crevice corrosion. It has a very low magnetic permeability, it is virtually non-magnetic, and it has a higher modulus of elasticity than is normally associated with copper alloys. All these properties are achieved without heat treatment and are combined with good machinability and the ability to take an excellent finish. The major use of Hiduron® 130 is in subsea hydraulic and electrical connectors such as flying lead connectors for stab plates. It is also used in naval winches, seawater valves and marine engineering generally. Additionally, it is applied in the aerospace industry for heavily stressed airframe components. Other applications include a variety of mechanical engineering and hydraulics systems amongst which are valve seat inserts and thrust washers for high performance internal combustion engines. It is covered by the specifications DIN 2.1504 and DTD 900/4805 to which it can be supplied when required. Langley Alloys stocks Hiduron® 130 as round bars from ½”-8” (12.7-203.2mm) diameter, and it can be supplied as bespoke forgings and blocks.
Nickel Alloys
Nickel alloys can offer enhanced corrosion resistance, toughness, strength at high and low temperatures, and interesting magnetic, thermal and electronic properties compared with other metals. Due to their higher nickel content compared with stainless steels, they can be appreciably more expensive, but find uses in more demanding applications from gas turbines to chemical plants and oil & gas industry components. Langley Alloys stocks the following grades of nickel-based alloys: 718, 625, 725, 825, 925, K500
Super Duplex Stainless Steels
The Home of Super Duplex Right from our development of the original super duplex stainless steel, Ferralium 255, Langley Alloys has pioneered the development and supply of this range of alloys. We carry stock of Ferralium 255, S32760 and S32750/2507 as bars, plate and pipe, giving us the widest and most complete range of products available. Super Duplex stainless steels have a ‘duplex’ two-phase microstructure consisting of both austenitic and ferritic grains that gives them a combination of attractive properties. Whilst duplex alloys were developed around a 22% Cr addition level, super duplex alloys utilise a higher 25%Cr base composition to increase the level of corrosion resistance achievable. In general, they are twice as strong as either austenitic or ferritic stainless steels. They achieve good toughness and ductility, somewhere between the two. Their corrosion resistance is also very good, assuming comparable levels of chromium, molybdenum and nitrogen in selected compositions. By increasing the level of chromium additions, combined with significant levels of molybdenum and nitrogen, super duplex stainless steels achieve a Pitting Resistance Equivalent number (PREN) >40, which will match or beat all but the most highly alloyed austenitic stainless steels and often provide comparable performance to some nickel alloys also. One further advantage over austenitic stainless steels is their resistance to stress corrosion cracking.