UNS K93600 / W.Nr.1.3912 Nickel Iron Alloy Good Ductility For Laser Component

Nickel iron alloy 36 (UNS K93600, W.Nr. 1.3912) bar, tube, strip, wire, forging for laser component etc.

1 PRODUCT

Nickel iron alloy 36 (UNS K93600, W.Nr. 1.3912) semi-products for laser component etc.

Alloy 36 is available in following standard semi-finished forms:

Sheet

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

Strip

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.

2 EQUIVALENT DESIGNATION

W.Nr. 1.3912, Ni36, Fe-Ni36(AFNOR), 1J36, 4J36, NILO alloy 36, VDM® Alloy 36, Pernifer 36, Invar 36

UNS K93600 (for thermostates), K93601 (for pressure vessels), K93602 (for chip removing process), K93603 (for alloys with low heat expansion)

3 OVERVIEW

Alloy 36 is a binary iron-nickel alloy with a particularly low heat expansion coefficient, whereby the levels of carbon and manganese as well as freedom of impurities are significant. Cold forming also reduces the heat expansion. Artificial aging with gradual heat treatment stabilizes the expansion coefficients in a selected temperature range.

Alloy 36 is characterized by:

◘ An extremely low expansion coefficient between -250°C (-418°F) and +260°C (500°F)

◘ Good ductility and toughness.

4 APPLICATION

Alloy 36 contains 36% nickel, mainly for controlled expansion and magnetic applications.

Typical applications are:

◘ Piping for storage and transport of liquefied gases

◘ Components for OLED screens

◘ Measuring and control devices for temperatures below 200°C (392°F), e.g. for thermostats

◘ Bushings for screw or rivet joints between various metals

◘ Bi-metal components and thermostatic bi-metals, where Alloy 36 is the passive component

◘ Forms for the production of carbon-fiber reinforced plastic (CFP), especially for the aerospace industry

◘ Frameworks for electronic control units in satellites and space travel down to -200°C (-328°F)

◘ Support elements for electro-magnetic lenses in laser control units

◘ Pendulum

◘ Components for the automotive industry

◘ Overhead power lines in an alloyed, age-hardenable variant

5 CHEMICAL COMPOSITION (wt%):

6 PHYSICAL PROPERTY

Density at 20°C: 8.11 g/cm³ (0.293lb/in³)

Curie temperature: 230°C(446°F)

Modulus of elasticity in tension: 20.3 x 10³ ksi (140 x 10³MPa)

Table 6-1 Melting and inflection points

Table 6-2 Thermal conductivity at 20°C (68°F)

Table 6-3 Mean coefficient of thermal expansion

Table 6-4 Thermal Conductivity

Table 6-5 Electrical resistivity

Table 6-6 Typical thermal expansion of Alloy 36

7 METALLOGRAPHY

In the soft annealed condition, Alloy 36 has a cubic face-centered crystal structure.

8 CORROSION RESISTANCE

In a dry atmosphere, Alloy 36 is corrosion resistant at room temperature. In unfavorable conditions, for example a humid atmosphere, corrosion may occur on the surface.

9 MECHANICAL PROPERTIES

Table 9-1 Typical Mechanical Properties of Alloy 36 in soft annealed condition

Table 9-2 Typical mechanical properties of soft annealed rods following cold forming at room temperature

Table 9-3 Hardness

10 WORKING INSTRUCTION

Alloy 36 can be easily formed both hot and cold and can also be machined. The workability is comparable to that of austenitic stainless steels.

Hot forming

Alloy 36 can be hot-formed in a temperature range between 1050 and 800°C (1922-1472°F) with subsequent rapid cooling down in water or air.

Cold forming

For cold forming, the workpiece should be in the annealed condition. Alloy 36 has a similar work hardening rate to austenitic stainless steels. This should be taken into account when selecting forming equipment and planning forming processes. Intermediate annealing is necessary for major cold forming work.

Heat treatment

The annealing should be performed at temperatures of 820 to 900°C (1580-1652°F), followed by air cooling. Compared with air cooling, water cooling following annealing results in a lower heat expansion coefficient.

Machining

Alloy 36 is preferably processed in the annealed condition. The machined characteristics of Alloy 36 are similar to those of austenitic stainless steels. Thanks to its high ductility, the chips resulting during machining tend to be string-like and tough, and can therefore result in fast wear to the cutting tool edge guides. The tool should be engaged at all times. A relatively low cutting speed should be used with a feed speed that is not too high. An adequate chip depth is important in order to cut below a previously formed work-hardened zone.

11 STANDARD SPECIFICATION

ASTM B388 Plate, strip

ASTM B603 Strip, wire

ASTM B753 Plate, sheet

ASTM F1684 Plate, sheet, bar, rod

DIN 1715 Sheet and strip

DIN 17470 Strip, wire

DIN 17745 Plate, sheet, bar, rod

SEW 385 Plate, sheet, bar, rod

AFNOR NF A54-301Composition

12 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.

13 BUSINESS TERM