Gunmetal

For other uses, see Gunmetal (disambiguation).
Gunmetal parts

Gunmetal, also known as red brass in the United States,[1] is a type of bronze an alloy of copper (85%), tin (5%), zinc (5%) and lead (5%).[2] Originally used chiefly for making guns, it was eventually superseded in this department by steel. Gunmetal, which casts and machines well and is resistant to corrosion from steam and salt water,[3] is used to make steam and hydraulic castings, valves, gears, statues and various small objects, such as buttons. It has a tensile strength of 221 to 310 MPa, a specific gravity of 8.7, a density 8,719 kg/m3, and a Brinell hardness of 65 to 74.from 143

Variants

Gunmetal can also mean steel treated to simulate gunmetal bronze.[2] Bushings made of this metal are used in machinery.

Other uses

The Victoria Cross, Britain's highest award for military valour, is traditionally made using gunmetal from a cannon captured at the Siege of Sevastopol during the Crimean War.

The British Gwalior Star medal, awarded to the British participants in the 1843 campaign against the Scindias, is made from guns captured at the Battles of Maharajpur and Punniar, during the Gwalior Campaign.

Gun money, Irish late 17th century emergency coins, contain gunmetal, as worn and scrapped guns were used to make them; but also many other metals, in particular brass and bronze, as people donated pots and pans and other metal objects.

Color

Gunmetal
 
    Color coordinates
Hex triplet #536267
sRGBB  (r, g, b) (83, 98, 103)
CMYKH   (c, m, y, k) (19, 5, 0, 60)
Source [Unsourced]
B: Normalized to [0–255] (byte)
H: Normalized to [0–100] (hundred)

Gunmetal as a color is entirely different to the reddish alloy of the same name described above. It is a shade of grey that has a bluish purplish tinge.

References

Look up gunmetal in Wiktionary, the free dictionary.
  1. "Gunmetal". Retrieved 2008-04-09.
  2. 1 2 "Gunmetal". Retrieved 2008-04-09.
  3. "Gunmetal". Retrieved 2008-04-09.
  4. 1 2 3 Brady, George Stuart; Henry R. Clauser; John A. Vaccari (2002). Materials Handbook. McGraw-Hill Professional. pp. 468–469. ISBN 0-07-136076-X.
  5. "C90300 Bronze Navy G - CDA 903". Anchor Bronze & Metals, Inc.
  6. Ammen, C.W. (2000). Metalcasting. McGraw-Hill Professional. p. 133. ISBN 0-07-134246-X.
  7. "C23000 Copper Alloys [Red Brass, C230] Material Property Data Sheet". Metal Suppliers Online.
This article is issued from Wikipedia - version of the Monday, April 04, 2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.