ChroMiuM boride manufacturers and suppliers

ChroMiuM boride suppliers

Properties

Melting point:: 1550°C

Density: 5.15

storage temp.: -20°C

form: Powder

color: Gray

Water Solubility: It is insoluble in water.

Crystal Structure: Hexagonal a = 292.9 pm c = 306.6 pm C32, hP3, P6/mmm, AlB2 type (Z = 1)

Exposure limits: NIOSH: TWA 0.0002 mg/m3

Stability:: Strongly corroded by molten metals such as Mg, Al, Na, Cu, Si, V, Cr, Mn, Fe, and Ni; corrosion resistant to liquid metals Cu, Zn, Sn, Rb, and Bi

Safety Information

Symbol(GHS): GHS07,GHS08,GHS09

Signal word: Danger

Hazard statements: H410-H350-H317

Precautionary statements: P273-P391-P501-P261-P272-P280-P302+P352-P333+P313-P321-P363-P501

WGK Germany: 3

TSCA: Yes

Use

Chromium boride occurs as very hard crystallinepowder in several phases: the CrBorthorhombic crystal, the hexagonal crystalCr2B, and the tetragonal crystal Cr3B2. Chromiumboride parts produced by powder metallurgyhave a specific gravity of 6.20 to 7.31,with a Rockwell A hardness of 77 to 88. Theyhave good resistance to oxidation at high temperatures,are stable to strong acids, and havehigh heat-shock resistance up to 1316°C. Thetransverse rupture strength is from 552 to 931MPa. CrB is used for oil-well drilling. A sinteredmaterial, used for gas-turbine blades, contains85% CrB with 15% nickel binder. It hasa Rockwell A hardness of 87 and a transverserupture strength of 848 MPa.

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