Muntz metal

Bow of the Cutty Sark

Muntz metal is a form of alpha-beta brass with about 60% copper, 40% zinc and a trace of iron. It is named after George Fredrick Muntz, a metal-roller of Birmingham, England who commercialised the alloy following his patent of 1832.

Known both as Muntz Metal and Yellow Metal,[1] the alloy must be worked hot and is used today for corrosion resistant machine parts.

Its original application was as a replacement for copper sheathing on the bottom of boats, as it maintained the anti-fouling abilities of the pure copper at around two thirds of the price. It became the material of choice for this application and Muntz made his fortune. Later it was used to sheathe the piles of piers in tropical seas, as a protection against teredo shipworms, and in locomotive tubes. After successful experimentation with the sheathing Muntz also took out a patent for bolts of the same composition. These too proved a success as they not only were cheaper but also very strong and lasted longer.

A notable use of Muntz Metal was in the hull of the Cutty Sark.[2]


Company history

Muntz's new metal contained more copper, less zinc, and a bit of iron not present in a similar 56:44 alloy patented by William Collins in 1800. Production began on Water Street, Birmingham, but moved to Swansea in 1837. In 1842 he bought the French Walls Works in Smethwick, formerly the site of James Watt Jr's ironworks. The 4.5-acre (18,000 m2) site soon proved inadequate, and in 1850 a further 6.5 acres (26,000 m2) were bought, on the other side of the Birmingham, Wolverhampton & Stour Valley Railway. Eventually as the business outgrew Muntz’s own rolling mill in Birmingham, he joined in partnership with Pascoe Grenfell and sons who produced it at their Swansea mill as ‘Muntz’s Patent Metal Company’. They and other partners then fixed the prices of the alloy at £18 per ton lower than the market price for the equivalent copper product, serving to establish Muntz Metal as the sheathing of choice where transport costs still kept it as an efficient competitor. As an example of their success in entering the market, 50 ships were metalled with Muntz Metal in 1837, over 100 in 1838, doubling in 1840 and doubling again by 1844.

With Muntz successfully supervising the manufacturing operations, by 1840 Muntz’s Patent Metal Company employed 30 men to smelt and roll the alloy and were producing 2,000 tons yearly. Three years later the Company had over 200 men producing 3-4000 tons yearly at £8 per ton profit. By then the Grenfells had left the partnership, for the agreement with Pascoe Grenfell & Sons had been terminated with some acrimony in 1842. When Muntz’s patent expired in 1846, they and others began making fastenings and sheathing to the Muntz patent at will.

Muntz died in 1857, to be succeeded by his eldest son, also called George Fredrick, who sold it in 1864 to a joint stock company, Muntz's Metal Co. Ltd. In 1921 the company was bought by Elliott's Metal Company, which became part of ICI's Imperial Metals division (now IMI plc) in 1928.[3]

See also


  1. ^ McCarthy, Michael (2005). Ships' fastenings: from sewn boat to steamship. Texas A&M University Press. pp. 115. ISBN 1585444510. 
  2. ^ James Watson (21 May 2007). "Blaze Guts Cutty Sark". Birmingham Mail. p. 5. 
  3. ^ McCarthy, M. (2005). Ship’s Fastenings: from sewn boat to steamship. Texas A&M Press. College Station. 

External links

Wikimedia Foundation. 2010.

Look at other dictionaries:

  • Muntz metal — Metal Met al (? or ?; 277), n. [F. m[ e]tal, L. metallum metal, mine, Gr. ? mine; cf. Gr. ? to search after. Cf. {Mettle}, {Medal}.] 1. (Chem.) An elementary substance, as sodium, calcium, or copper, whose oxide or hydroxide has basic rather than …   The Collaborative International Dictionary of English

  • Muntz metal — Muntz met al See under {Metal}. [1913 Webster] …   The Collaborative International Dictionary of English

  • Muntz metal — n. an alloy (60% copper, 40% zinc) used for sheathing ships etc. Etymology: G. F. Muntz, Engl. manufacturer d. 1857 * * * noun a brass that has more zinc and is stronger than alpha brass; used in making castings and hot worked products • Syn:… …   Useful english dictionary

  • Muntz metal — /munts/. See alpha beta brass. [1860 65; named after its inventor, G. F. Muntz, 19th century English metallurgist and manufacturer] * * * ▪ brass also called  Yellow Metal,         variety of the alloy brass consisting of 60 percent copper and 40 …   Universalium

  • Muntz metal — muncmetalas statusas T sritis chemija apibrėžtis 60% Cu ir 40% Zn lydinys. atitikmenys: angl. yellow brass; malleable brass; Muntz yellow metal; Muntz metal rus. мунцметалл …   Chemijos terminų aiškinamasis žodynas

  • Muntz metal — Composition Com po*si tion, n. [F. composition, fr. L. compositio. See {Composite}.] 1. The act or art of composing, or forming a whole or integral, by placing together and uniting different things, parts, or ingredients. In specific uses: (a)… …   The Collaborative International Dictionary of English

  • Muntz metal — [mʌnts] noun a form of brass used for casting and working at high temperatures. Origin C19: named after the English manufacturer George F. Muntz …   English new terms dictionary

  • Muntz metal — /ˈmʌnts mɛtl/ (say munts metl) noun an alloy containing approximately 60 per cent copper and 40 per cent zinc, harder and stronger than brass. {named after GF Muntz, 19th century English metallurgist} …   Australian English dictionary

  • Muntz metal — Смотри Мунц металл …   Энциклопедический словарь по металлургии

  • Muntz — (or Müntz) is a surname and may refer to: Contents 1 Muntz 2 Müntz 3 See also 4 References Muntz George Frede …   Wikipedia

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