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Niobium Products suppliers

 

Niobium machined parts
Raytec metal Provides machined pure niobium, niobium zirconium alloy parts according to customer drawing and request. Niobium crucible, Niobium flange, Niobium container, Niobium grounding ring, Niobium nut, Niobium tips, Niobium Bolt, Niobium screw, other machined Niobium parts.
All the normal machining techniques can be used for niobium. The metal has a strong tendency to gall, however, and special attention must be paid to tool design and lubricant use. In lathe turning, the metal behaves very much like soft copper. The use of high-speed tooling with adequate lubrication and cooling with soluble oil (or other suitable product) following the parameters given here is recommended.
Although carbide tools can be used, the tendency to gall is more pronounced with them than with high-speed steel. In turning, the metal should be removed in a shearing action and the chip allowed to slide off the tool surface. When build-up of the chip occurs, the resulting pressure breaks the cutting edge of the tool.
The machining recommendations shown in the accompanying table generally give satisfactory results. The minimum surface speed of 80 feet per minute is important. Slower speeds will cause the metal to tear, particularly annealed stock. Normally, unannealed metal is preferred for lathe operations.
Tooling Recommendations for Machining Niobium
Approach angles: 15掳 - 20掳
Side Rake: 30掳 - 35掳
Side and End Clearances: 5掳
Plan Relief Angle:15掳 - 20掳
Nose Radius: .020" - .030"
Cutting Speed: 60 - 80 feet/ minute with high speed steel. 250 - 300 feet/ minute with carbide tools.
Feed, Roughing: .008" - .012"/ revolution
Feed, Finishing: .005" maximum / revolution
Depth of cut: .030" - .125"
PHYSICAL PROPERTIES
PHASE 鈥?Solid
STD ATOMIC WEIGHT 鈥?Solid
STD ATOMIC WEIGHT 鈥?92.90638(2) g-mol-1
MELTING TEMPERATURE 鈥?2750 K, 2477掳 C, 4491掳 F
BOILING POINT 鈥?5017 K, 4744掳 C, 8571掳 F
CRYSTAL STRUCTURE 鈥?Body Centered Cubic
ELECTRICAL RESISTIVITY 鈥?(0 掳C) 152 n惟路m
THERMAL CONDUCTIVITY 鈥?(300 K) 53.7 W路m鈭?路K鈭?
THERMAL EXPANSION 鈥?7.3 碌m/(m路K)
GENERAL PROPERTIES
SYMBOL 鈥?Nb
NUMBER 鈥?41
ELEMENT CATEGORY: 鈥?Transition Metals
AVAILABLE PURITIES:
路 Commercial Grade ( ASTM )
路 3N 99.9%COMMON SPECIFICATIONS
路 ASTM R04210
o禄 Commercial Grade (Unalloyed)
路 ASTM R04200
o禄 Reactor Grade (Unalloyed)
路 ASTM R04261
o禄Commercial Grade Niobium 1% Zirconium Alloy
路 ASTM R04220
o禄RRR Grade Pure Niobium
AVAILABLE ALLOYS:
路 Niobium
路 Niobium 1% ZirconiumNiobium Products suppliers
website:http://www.raytec-metal.com/niobium-products/

 

143 views Jun 30, 2020
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