Bronze SAE 620
Mercobronze is a foundry company specializing in the manufacture of Bronze SAE 620 materials (such as billets and bushings) and finished parts ready for installation and use (such as gears and bearings). So the company relies on an efficient continuous casting system and a modern machining structure.
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Bronze 620
Bronze 620 is recognized for its impact and wear resistance. Due to these attributes, it has become the alloy of choice in the manufacture of components subjected to extreme conditions, which operate with heavy loads and at low speeds.
Bronze SAE 620 general characteristics
The general characteristics of Bronze SAE 620, in particular its high resistance, result from the components used in its formulation:
- Cu = 86% – 89%
- Sn = 7,5% – 9%
- Zn = 3% – 5%
- Ni = 1% max
- Pb = 0,30% max
- Fe = 0,20% max
- Sb = 0,20% max
- P = 0,05% max
- S = 0,05% max
- Al = 0,005% max
- Si = 0,005% max
Also called C90300, bronze 620 belongs to the group of phosphor bronzes, given the presence of phosphorus in its composition. This element increases the rigidity and mechanical strength of materials and parts made from the alloy, reducing wear.
The high concentration of tin contributes to increasing the hardness of bronze 620; zinc produces wear resistance.
Among the general characteristics of bronze SAE 620, the following stand out:
Characteristics related to the production of materials and parts
- Malleability
- Ease of cutting and machining
- Excellent weldability
- High degree of machinability
- Great finish
Characteristics related to the performance of materials and parts
- Oxidation resistance
- Resistance to corrosive agents
- Impact resistance
- Abrasion resistance
- Higher hardness level
- Long service life
Characteristic related to economy
- Excellent value for money
Characteristics related to physical properties
- Densidade (lb/in3 at 68°F): 0,318
- Density (lb/in3 at 68°F): 0.318
- Thermal Conductivity: 74w/cm.k
- Electrical Conductivity: 12.5% I.A.C.S
- Melting point: 1090-1240ºC
- Thermal Expansion: 1.8 10-5
Characteristics related to mechanical properties
- Melting Point – Liquidus: 1832°F
- Melting Point – Solidus: 1570°F
- Density: 0,318lb/in 3 to 68°F
- Specific gravity: 8.8
- Electrical conductivity: 12% IACS at 68°F
- Thermal conductivity: 43,2Btu/sq ft/ft hr/°F at 68°F
- Coefficient of thermal expansion: 10 • 10-6 per °F (68-392°F)
- Specific Heat Capacity: 0,09Btu/lb/°F at 68°F
- Modulus of elasticity in tension: 14.000ksi/96.527MPa
- Magnet permeability: 1
Aplicações do bronze 620
Bronze 620 serves numerous industrial applications. Between them:
Constrution
- Heavy construction equipment
Eletrical
- Connectors
Metal mechanic
- Gears
- High resistance bushings
- Bearings for heavy loads at low speeds
- Piston rings
- Sealing rings
- Movable bridges
- Turntables for bridges
- Nuts
- Finishing matrices for the wood pulp industry
- Worm screws
- Bearings for heavy loads and moderate rotation
- Worm screw crowns
Hydraulic
- Steam connections
- Water conditioners
- Pump impellers
- Valve bodies
- Pump rotors
Musical instruments
- Percussion and wind instruments, such as trombones and saxophones
Mercobronze Bronze SAE 620
Mercobronze bronze 620 is an input used in the manufacture of many products. Our casting lines operate with high-tech equipment and use four different types of casting, depending on the characteristics, dimensions and quantity of the pieces ordered:
Continuous casting
Performs the casting process in a single operation, by simplifying, standardizing and eliminating steps present in conventional casting. It results in high productivity, low cost, standardization and standard quality in all production lots.
Centrifugal casting
It consists of pouring liquid metal into a cylindrical mold that rotates at high speed. It produces materials and parts with excellent mechanical properties and very low granulation and porosity.
Die casting
This process uses permanent and reusable metal molds. It can use gravity, gas pressure or vacuum to fill the mold with liquid metal.
Sand casting
In this technique, molds made with sand are used, which are disposable at the end of the process. It is indicated for the production of special parts, orders with few units or with non-uniform shape.
To learn about the complete line of Mercobronze products, just contact our commercial and technical team.
