Alloy surcharges for February 2023

Please see surcharges for February 2023

surcharges for feb 2023

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Merry christmas

The teams here at Quest 4 Alloys Ltd & Millstock stainless Ltd  would like to wish you all a Merry Christmas and a wonderful New Year!

Christmas shut down is 21st December -3rd January


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Christmas Shutdown

Quest 4 Alloys would like to take this opportunity to wish all our customers a very merry Christmas and a happy new year.

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Alloy 904L (UNS N08904) is a super austenitic stainless steel that is designed for moderate to high corrosion resistance in a wide range of process environments. The combination of high chromium and nickel content, coupled with additions of molybdenum and copper, assure good to excellent corrosion resistance. With its highly alloyed chemistry — 25% nickel and 4.5% molybdenum, 904L provides good chloride stress corrosion cracking resistance, pitting and general corrosion resistance superior to 316L and 317L molybdenum enhanced stainless steels. Alloy 904L was originally developed to withstand environments containing dilute sulfuric acid. It also offers good resistance to other inorganic acids such as hot phosphoric acid as well as most organic acids. Alloy 904L is easily welded and processed by standard shop fabrication practices.

Resistance to corrosion

  • Good strength and toughness at cryogenic temperatures
  • Ease of cleaning
  • Excellent formability
  • Resistance to oxidation
  • Prevention of product contamination
  • East of fabrication
  • Beauty of appearance
  • High strength with low weight
  • Ready availability of a wide range of product forms



The high content of alloying elements in 904L gives the alloy exceptionally good resistance to uniform corrosion. 904L was originally developed to withstand environments containing dilute sulphuric acid, and is one of the few stainless steels that, at temperatures up to 95°F (35°C), providefull resistance in such environments within the entire concentration range of 0 to 100%. 904L also offers good resistance to a number of other inorganic acids, such as phosphoric acid and most organic acids. However, acids and acid solutions containing halide ions can be very aggressive, and the corrosion resistance of 317L,317LMNand904Lmaybeinsufficient. Fractional distillation otall oil often needs better material than 316Lor even the more frequently used 317LMN.  In these hot concentrated caustic solutions, the corrosion resistance is mainly determined by the nickel content of the material. With a nickel content of 25%, 904L has proven to be a good alternative to most conventional stainless steels. Conventionalstainlesssteelssuchas304Land 316Laresusceptibleto chloride stress corrosion cracking(SSC) under certain conditions. Resistance to SSC increases with the increased content of nickel and molybdenum. Therefore, the higher performance austenitic stainless steels such as 904L have very good resistance to SSC.



Alloy 904L can be readily welded by most standard processes. Austenitic plate materials have a homogeneous austenitic structure with an even distribution of alloying elements. Solidification after welding causes the redistribution of certain elements such as molybdenum, chromium and nickel. These segregations remain in the cast structure of the weld and can impair the corrosion resistance in certain environments. Segregation is less evident in 904L, and this material is normally welded using a filler metal of the same composition as the base metal and can even be welded without filler metal. The welding consumables for 904L are 20 25 CuL covered electrode 


Working temperatures of 1562 – 2102°F (850 –1150°C) are recommended for hot working processes. Normally hot working should be followed by a solution anneal and quench, but for 904L, if hot forming is discontinued at a temperature above 2012°F (1100°C)  and the material is quenched directly thereafter, the material may be used without subsequent heat treatment. It is important that the entire work piece be quenched from temperatures above 2012°F (1100°C). In the event of partial heating or cooling below 2012°F (1100°C), or if the cooling has been  too  slow, hot working should always be followed by a solution anneal and quenching. 904L should be solution annealed at 1940–2084°F (1060–1140°C)


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ALLOY Alloy 625 (UNS designation N06625) is a nickel-based superalloy that possesses high strength properties and resistance to elevated temperatures. It also demonstrates remarkable protection against corrosion and oxidation. Its ability to withstand high stress and a wide range of temperatures, both in and out of water, as well as being able to resist corrosion while being exposed to highly acidic environments makes it a fitting choice for nuclear and marine applications.

Alloy 625 was developed in the 1960s with the purpose of creating a material that could be used for steam-line piping. Some modifications were made to its original composition that have enabled it to be even more creep-resistant and weldable. Because of this, the uses of Alloy 625 have expanded into a wide range of industries such as the chemical processing industry, and for marine and nuclear applications to make pumps and valves and other high pressure equipment.

Because of the metal’s high Niobium (Nb) levels as well as its exposure to harsh environments and high temperatures, there was concern about the weldability of Inconel 625. Studies were therefore conducted to test the metal’s weldability, tensile strength and creep resistance, and Alloy 625 was found to be an ideal choice for welding. Other well known names for Alloy 625 are Haynes 625, Nickelvac 625, Nicrofer 6020, Inconel 625 and Chronic 625


Markets for Inconel 625 include:

  • Offshore
  • Marine
  • Nuclear
  • Chemical Processing
  • Aerospace
  • Glow Plugs


Product and technology applications of Inconel 625 include:

  • Seawater components
  • Flare stacks
  • Aircraft ducting systems
  • Fabrication with Inconel 625
  • Specialized seawater equipment
  • Chemical process equipment
  • Turbine shroud rings
  • Engine thrust-reverser systems
  • Jet engine exhausts systems
  • Boiler furnaces


Specifications and certifications include:

  • AMS: 5599, 5666
  • MS: 5837
  • ASME: SB 443 Gr 1, SB 446 Gr 1
  • ASTM: B 443 Gr 1, B 446 Gr 1
  • EN: 2.4856
  • ISO: 15156-3
  • NACE: MR0175-3
  • UNS: N06625
  • Werkstoff: 2.4856
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Closure Monday 19th September 2022

On Monday 19th September, QUEST 4 ALLOYS LTD will be closed in respect of Her Majesty’s State Funeral.

We shall reflect on The Queen’s remarkable life and dedication to the people of the United Kingdom and of the Commonwealth.

we will re open on Tuesday 20th of September



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Bank Holiday for the Queens Jubilee

Quest 4 Alloys will be closed on the 2nd & 3rd of June

We will re open on Monday 6th June! 🙂


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Happy Easter

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Quest 4 Alloys job of the week!

This is one of the largest Diameters in Waspaloy I’ve ever seen!! 300mm dia full 3.1 test certs. This is a sample requirement for a customer and were excited to see the larger pcs!

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This weeks job of the week goes to these MASSIVE round bars.

254SMO 355.6MM dia x 1105mm long

254SMO 357.6MM dia x 1105mm long




If this is something you are looking for, Please contact our sales staff on +441902 409316 or [email protected]

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