Alloy 32-5 bar, tube, strip, foil, wire for electronic tube, optical instrument and telescope etc.

1 OVERVIEW

Alloy 32-5 is an austenitic, solid solution alloy with gummy like texture that belongs to the invar family of nickel-iron alloys.

Alloy 32-5 is a ultra low expansion alloy consisting of 32% Nickel, 5% Cobalt, and balance Iron. Alloy 32-5 exhibits near zero thermal expansion at room temperatures (one half of Invar Alloy 36), as well as thermal expansion properties less than that of Invar Alloy in the 67 to 203°F (-55 to 95°C) temperature range. The minimal expansion of Alloy 32-5 over this range of temperatures, makes this alloy useful in many applications including structural components and substrates in instrument systems requiring precision measurements.

2 APPLICATION

Typical applications:

◘ Optical instruments

◘ Telescopes

◘ Laser instruments and equipment

◘ Ring laser gyroscopes

◘ Laser benches

◘ Positioning devices

◘ Metrology devices

◘ Structural components

◘ Substrates in instrument systems requiring precision measurements

◘ And other applications that require lower expansivity than Invar Alloy provides.

3 CHEMICAL COMPOSITION (wt%):

4 PHYSICAL PROPERTY

Linear coefficient of thermal expansion

5 MECHANICAL PROPERTIES

Typical mechanical properties of Alloy 32-5 in annealed condition

6 WORKING INSTRUCTION

Alloy 32-5 can be hot or cold worked, machined and formed by processes similar to those used for austenitic stainless steels.

Machinability

Alloy 32-5 machines similar to, but not as well as, Type 316 austenitic stainless steel. Its machinability rating is approximately 25% that of AISI B1112. This alloy is somewhat difficult to machine because the machined chips are gummy and stringy. Work hardened bars can result in some improvement in machinability.

Tool geometries normally used for austenitic stainless steels are suitable for this alloy. All tools should be kept sharp with a fine finish, be as large as possible, and rigidly supported.

Recommended cutting fluids are 1 to 1 blend of sulfachlorinated petrolum oil containing 8 to 10% fatty oil and a paraffin blending oil, or a water emulsifiable cutting fluid with polar and extreme pressure additives.

Parts should be degreased and cleaned as soon after machining as possible to remove any residual sulfur which can cause grain boundary embrittlement.

When using carbide tools, surface speed feet/minute can be increased between 2 to 3 times over the high speed suggestions. Feeds can be increased between 50 to 100%.

On certain work, the nature of the part may require adjustment of speeds and feeds. Each job has to be developed for best production results with optimum tool life. Speeds and feeds should be increased or decreased in small steps.

Forging

Suggested forging temperature is 2000 to 2150°F. Heat rapidly and avoid soaking in the forging furnace. Long soaking time may result in a checked surface due to oxygen and sulfur contamination.

Grinding

A soft silicon carbide wheel which will wear without loading is recommended. For finishing grinding, a satisfactory wheel roughness to start with is No. 80 grit.

7 STANDARD SPECIFICATION

ASTM F1684 Plate, sheet, bar, rod

AMS 1-23011

8 COMPETITIVE ADVANTAGE:

(1) More than 50 years experience of research and develop in high temperature alloy, corrosion resistance alloy, precision alloy, refractory alloy, rare metal and precious metal material and products.
(2) 6 state key laboratories and calibration center.
(3) Patented technologies.

(4) Ultra-purity smelting process: VIM + IG-ESR + VAR

(5) Excellent high performance.

9 BUSINESS TERM

10 PRODUCT

Alloy 32-5 semi-products for electronic tube, optical instrument, and telescope etc.

Alloy 32-5 is available in following standard semi-finished forms:

Sheet & plate

Delivery condition: Hot or cold rolled, heat treated, descaled or pickled

Strip & foil

Delivery condition: Cold rolled, heat treated, pickled or bright annealed

Bar and rod

Delivery condition: Forged, rolled, drawn, heat treated, oxidized, descaled or pickled, turned, peeled, ground or polished

Wire (profile, round, flats, square)

Delivery condition: Drawn bright, ¼ hard to hard, bright annealed in rings, containers, on spools and headstocks

Wire rod

Delivery condition: hot rolled (dia.5.5mm to 40mm)

Others

Other shapes and dimensions such as discs, rings, seamless pipes and forgings can be requested.

EQUIVALENT DESIGNATION

Super Invar®, Invar 32-5

With background of more than 50 years of material R&D experience, CMMC is a high-tech enterprise specialized in production of high temperature alloys, corrosion resistant alloys, precision alloys, wear resistant alloys, refractory alloys and other special alloys.

With main smelting equipments by CONSARC, including vacuum induction melting furnace (VIM 3 metric tons x 1 set), inert gas protective electric slag remelting furnace (IG-ESR 5 metric tons x 1 set, 10 metric tons x 2 sets), vacuum arc remelting furnace (VAR 10 metric tons x 1 set), CMMC has an annual production capacity of 3000 metric tons.

Established in 2016, CMMC stll having an investing plan of more than 30 million U.S.Dollars in the coming 5 years. CMMC aspires to become an internationally renowned supplier and leading brand of key materials for core components of high-end equipments in the application fields of aerospace, clean energy, petroleum, chemical engineering, medical, marine engineering, food and automobile, etc.

Our main products include forgings, bars, rods, tubulars, plates, sheets, strips, wire rods, precision wires, etc.

From ultra-pure smelting,  hot and cold forming, heat treatment, mechanical processing to finish machining, CMMC provides the whole process of one-stop professional services.

From demand idea to research and development, from technology innovation to promoting of products upgrading, from customer's puzzles and difficulties to final solution, from smelting to market, no matter wherever, whenever, whatever and however, CMMC always try to provide satisfactory one-stop service.

By providing better materials to make a better world, CMMC never give up the dream.