U. S. Bureau of Mines Collection - C-832-BC Melting Test Ingots of Titanium

Photograph

-

Boulder City/Hoover Dam Museum

0022:0153: U. S. Bureau of Mines Collection - C-832-BC Melting Test Ingots of Titanium ["Since impurities act to harden titanium, a quick test of purity is to melt a sample of the sponge and measure the hardness of the resulting ingot. The softer the ingot, the greater the purity. The sample of sponge is pressed to form a small compact or briquette. Then it is placed on a water-cooled copper heart h in a small arc furnace. After a protective atmosphere of helium has been established, the compact is melted by an arc struck between it and a tungsten-tipped electrode. In the picture, the rubber-gloved operator can be seen manipulating the electrode as he melts a compact, and the flame of the arc can be seen through the glass walls of the furnace."]
0022:0153

U. S. Bureau of Mines Collection - C-832-BC Melting Test Ingots of Titanium ["Since impurities act to harden titanium, a quick test of purity is to melt a sample of the sponge and measure the hardness of the resulting ingot. The softer the ingot, the greater the purity. The sample of sponge is pressed to form a small compact or briquette. Then it is placed on a water-cooled copper heart h in a small arc furnace. After a protective atmosphere of helium has been established, the compact is melted by an arc struck between it and a tungsten-tipped electrode. In the picture, the rubber-gloved operator can be seen manipulating the electrode as he melts a compact, and the flame of the arc can be seen through the glass walls of the furnace."]

Name/Title

U. S. Bureau of Mines Collection - C-832-BC Melting Test Ingots of Titanium

Entry/Object ID

0022:0153

Description

U. S. Bureau of Mines Collection - C-832-BC Melting Test Ingots of Titanium ["Since impurities act to harden titanium, a quick test of purity is to melt a sample of the sponge and measure the hardness of the resulting ingot. The softer the ingot, the greater the purity. The sample of sponge is pressed to form a small compact or briquette. Then it is placed on a water-cooled copper heart h in a small arc furnace. After a protective atmosphere of helium has been established, the compact is melted by an arc struck between it and a tungsten-tipped electrode. In the picture, the rubber-gloved operator can be seen manipulating the electrode as he melts a compact, and the flame of the arc can be seen through the glass walls of the furnace."]

Collection

US Bureau of Mines, Boulder City Businesses

Made/Created

Artist Information

Artist

U. S. Dept. of the Interior - Bureau of Mines

Role

Photographer

Time Period

not provided

Notes

Original or negative: Original

Location

Location

* Untyped Location

Research Room, Photo Drawer 11

Date

June 22, 2026

Created By

[email protected]

Create Date

February 2, 2024

Updated By

[email protected]

Update Date

June 22, 2026