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Detailed size range:
C17200 beryllium copper tubes cover a wide range of sizes, mainly divided into two categories: conventional tubes and capillaries:
Conventional tubes: outer diameter range 0.5~360mm, wall thickness 0.1~50mm, can be supplied in straight strips or rolls, and the shape is mainly round.
Capillary tubes: suitable for precision instruments such as pressure gauges or optical equipment, common sizes include outer diameter 1.5~8mm, wall thickness 0.2~2.9mm, and some customized products can reach smaller specifications (such as outer diameter 2.4mm×wall thickness 2.2mm×length 80mm).
International standards:
The main implementation standard of C17200 beryllium copper tube is ASTM B194-2015, which covers its chemical composition, mechanical properties and processing requirements.
In addition, some application scenarios may refer to NACE MR0175/ISO 15156 standards, especially in corrosion resistance and high pressure environments.
Chemical composition (weight percentage)
Core elements:
Beryllium (Be): 1.80-2.15%
Cobalt (Co): 0.35-0.65%, or ≥0.20% when combined with nickel.
Nickel (Ni): 0.20-0.25%, or ≤0.6% when combined with cobalt.
Copper (Cu): Remainder, usually ≥99.5%.
Impurity limits:
Silicon (Si), iron (Fe), aluminum (Al) are all ≤0.15%.
Titanium (Ti): 0.10-0.25%
The performance indicators are significantly affected by the heat treatment state, mainly divided into age-hardened state and annealed state:
Age-hardened state (high-strength state):
Tensile strength: 1105-1520 MPa, up to 1520 MPa (220 ksi).
Yield strength (0.2% offset): 1035-1345 MPa.
Hardness: 38-44 HRC, up to HRC 45 after peak aging.
Elongation: 1-2%, low elongation is associated with high strength.
Annealed or soft state:
Tensile strength: 590-830 MPa.
Elongation: up to 24%.
Other key properties:
Elastic modulus: 128-185 GPa, different literatures have different values due to different test methods.
Fatigue limit: equivalent to special steel, with high fatigue resistance.
Impact toughness: at least 32 J.
Physical properties
Density: 8.25-8.36 g/cm³.
Thermal conductivity: 105 W/(m·K) (20℃), some literature gives higher values (324 W/(m·℃), the unit or test conditions may be different).
Electrical conductivity: 18-22% IACS, high conductivity is one of its core advantages.
Thermal expansion coefficient: 17-24.3×10⁻⁶/℃.
Production process and product advantages of C17200 beryllium copper tube:
1. Production process
Alloy smelting
Vacuum smelting technology is used to avoid metal oxidation and ensure material purity. Shanghai Muyan Alloy Company uses 20MN double-acting reverse extruder and vacuum furnace, and cooperates with spectrometers and other testing equipment to strictly control quality.
Hot processing forming
Including hot extrusion, hot rolling and forging, suitable for primary forming of pipes, plates, etc. The material remains machinable at a softening temperature of 930℃.
Cold processing process
Supports cold rolling, stamping, bending, spinning and hydraulic forming, which can realize complex shape processing. When the deformation is large, the annealing temperature needs to be controlled (α phase grain <0.035mm).
Heat treatment process
The core is solution treatment (780-820℃) and aging treatment (300-350℃), which significantly improves strength through precipitation hardening. After aging, the tensile strength can reach 1400MPa and the hardness is HRC45. Pre-aging treatment can improve cutting performance.
Welding and processing
Supports a variety of welding methods: soldering, resistance welding, plasma welding, electron beam welding, etc., especially electron beam welding is recommended in vacuum/high pressure environment. The machinability is 20% of free-cut brass, and it is better after aging.
2. Product advantages
Excellent mechanical properties
High strength: tensile strength up to 1400MPa, yield strength 1035MPa, hardness HRC38-44, known as the "king of non-ferrous metal elasticity".
High elastic modulus (128GPa) and fatigue resistance, suitable for dynamic parts such as springs and diaphragms.
Excellent physical properties
Electrical conductivity and thermal conductivity: electrical conductivity 18%IACS, thermal conductivity 105W/m·k, both heat dissipation and electrical conductivity requirements.
Corrosion resistance: stable in the atmosphere, fresh water, and seawater, resistant to dilute acid and phosphoric acid corrosion (except humid ammonia and nitric acid environments).
Wide processing adaptability
Balanced hot/cold processing performance, can produce pipes with outer diameter of 0.75"-16" and wall thickness of 10-20%, meeting the precision requirements of aviation bushings, oil well tools, etc.
Non-magnetic and no sparks on impact, suitable for explosion-proof tools and navigation instruments.
Advantages in special scenarios
Mold application: High thermal conductivity can shorten the injection molding cycle, good mirror polishing, used for mold inserts, hot runner nozzles, etc.
Aerospace: High fatigue strength, suitable for key components such as airspeed indicator diaphragms and parachute opener springs.
III. Typical application areas
Electrical: connectors, relays, micromotor brushes
Molds: injection molds, blow molds, non-magnetic molds
Oil and gas: downhole instrument housings, drill pipe assemblies
Transportation: automotive spring sheets, aviation bearings
Q1:Do you provide samples? Is it free or extra?
A1:Yes, we can provide samples free of charge and the customer will pay the freight.
Q2:What if I don't have export experience ?
A2:We have reliable forwarder agent which can ship items to you by sea/air/Express to your doorstep. Any way, we will help you choose the most suitable shipping service.
Q3:How long is your lead time?
A3:If it is in stock, it is usually 5-10 days. Or, if there is no inventory, 15 days, depending on the quantity.
Q4:What are your terms of payment?
A4:30% T/T deposit in advance, 70% T/T balance within 5 days after B/L copy, 100%.Irrevocable L/C at sight, 100% Irrevocable L/C after receive B/L 30-120 days, O/A.
Q5:How is your technical support?
A5:We provide lifetime online support through Whatsapp/ Skype/ Wechat/ Email. Any problem after delivery, we will offer you call anytime.
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