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ASTM B637 DIN 2.4631

DIN 2.4952 UNS N07080

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Super Alloy Nimonic 80A(tm)

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Specifications

Related Tradenames and Metal Names

Chemistry Data

Welding, Machining/ General Data

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Physical Data

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Availability

Super Alloy Nimonic 80A(tm) is stocked by 9 North American distributors and produced by 8 large

mills. Distributors will offer small quantity buys while mills will generally only sell large quantities,

with delivery times anywhere from 10 to 50 weeks depending on size and form required

This material is stocked primarily in Bar Products by 6 distributors but is also available to a lesser

extent in Flat Rolled Products, Wire Products, Tubular Products, and Casting Products.

For distributor (small quantity) availability click here

For mill (large volume) production click here

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Specifications

The following specifications cover Super Alloy Nimonic 80A(tm)

Property Results

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Related Metals:

Udimet 80A(tm)

Nicrofer 7520 Ti(tm)

Chemistry Data : [top]

Aluminum 1 - 1.8

Boron 0.008 max

Carbon 0.1 max

Chromium 18 - 21

Cobalt 0.2 max

Copper 0.2 max

Iron 3 max

Manganese 1 max

Nickel Balance

Phosphorus 0.045 max

Silicon 1 max

Sulphur 0.015 max

Titanium 1.8 - 2.7

Principal Design

Features

A nickel-chromium alloy strengthened by additions of titanium

and aluminum. The alloy is used for high temperature, high

strength applications.

Applications Gas turbine hot section components.

Machinability Conventional machining techniques used for iron based alloys

may be used. This alloy does work-harden during machining and

has higher strength and "gumminess" not typical of steels.

Heavy duty machining equipment and tooling should be used to

minimize chatter or work-hardening of the alloy ahead of the

cutting. Most any commercial coolant may be used in the

machining operations. Water-base coolants are preferred for

high speed operations such as turning, grinding, or milling.

Heavy lubricants work best for drilling, tapping, broaching or

boring. Turning: Carbide tools are recommended for turning

with a continuous cut. High-speed steel tooling should be used

for interrupted cuts and for smooth finishing to close tolerance.

Tools should have a positive rake angle. Cutting speeds and

feeds are in the following ranges: For High-Speed Steel Tools

For Carbide Tooling Depth Surface Feed Depth Surface Feed of

cut speed in inches of cut speed in inches inches feet/min. per

rev. inches feet/min. per rev. 0.250" 25-35 0.030 0.250" 150-

200 0.020 0.050" 50-60 0.010 0.050" 325-375 0.008 Drilling:

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Steady feed rates must be used to avoid work hardening due to

dwelling of the drill on the metal. Rigid set-ups are essential

with as short a stub drill as feasible. Heavy-duty, high-speed

steel drills with a heavy web are recommended. Feeds vary from

0.0007 inch per rev. for holes of less than 1/16" diameter,

0.003 inch per rev. for 1/4" dia., to 0.010 inch per rev. for

holes of 7/8"diameter. Milling: To obtain good accuracy and a

smooth finish it is essential to have rigid machines and fixtures

and sharp cutting tools. High-speed steel cutters such as M-2 or

M-10 work best with cutting speeds of 30-40 feet per minute

and feed of 0.004"-0.006" per cutting tooth. Grinding: The alloy

should be wet ground and aluminum oxide wheels or belts are

preferred.

Forming This alloy has good ductility and may be readily formed by all

conventional methods. Because the alloy is stronger than regular

steel it requires more powerful equipment to accomplish

forming. Heavy-duty lubricants should be used during cold

forming. It is essential to thoroughly clean the part of all traces

of lubricant after forming as embrittlement of the alloy may

occur at high temperatures if lubricant is left on.

Welding The commonly used welding methods work well with this alloy.

Matching alloy filler metal should be used. If matching alloy is

not available then the nearest alloy richer in the essential

chemistry (Ni, Co, Cr, Mo) should be used. All weld beads should

be slightly convex. It is not necessary to use preheating.

Surfaces to be welded must be clean and free from oil, paint or

crayon marking. The cleaned area should extend at least 2"

beyond either side of a welded joint. Gas-Tungsten Arc Welding:

DC straight polarity (electrode negative) is recommended. Keep

as short an arc length as possible and use care to keep the hot

end of filler metal always within the protective atmosphere.

Shielded Metal-Arc Welding: Electrodes should be kept in dry

storage and if moisture has been picked up the electrodes

should be baked at 600 F for one hour to insure dryness. Current

settings vary from 60 amps for thin material (0.062" thick) up

to 140 amps for material of 1/2" and thicker. It is best to weave

the electrode slightly as this alloy weld metal does not tend to

spread. Cleaning of slag is done with a wire brush (hand or

powered). Complete removal of all slag is very important before

successive weld passes and also after final welding. Gas Metal-

Arc Welding: Reverse-polarity DC should be used and best

results are obtained with the welding gun at 90 degrees to the

joint. For Short-Circuiting-Transfer GMAW a typical voltage is

20- 23 with a current of 110-130 amps and a wire feed of 250-

275 inches per minute. For Spray-Transfer GMAW voltage of 26

to 33 and current in the range of 175-300 amps with wire feed

rate of 200-350 inches per minute are typical. Submerged-Arc

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Welding: Matching filler metal, the same as for GMAW, should

be used. DC current with either reverse or straight polarity may

be used. Convex weld beads are preferred.

Heat Treatment Solution anneal at 1975 F for 8 hours and air cool. The hold at

1300 F for 16 hours to precipitation harden and air cool.

Forging Forging may be done in the temperature range of 2150 F to

1800 F.

Hot Working Hot working may be done in the temperature range of 2150 F to

1800 F. Avoid hot working at temperatures of 1000 F to 1800 F.

Cold Working Cold forming may be done using standard tooling although plain

carbon tool steels are not recommended for forming as they

tend to produce galling. Soft die materials (bronze, zinc alloys,

etc.) minimize galling and produce good finishes, but die life is

somewhat short. For long production runs the alloy tool steels (

D-2, D-3) and high-speed steels (T-1, M-2, M-10) give good

results especially if hard chromium plated to reduce galling.

Tooling should be such as to allow for liberal clearances and

radii. Heavy duty lubricants should be used to minimize galling

in all forming operations. Bending of sheet or plate through 180

degrees is generally limited to a bend radius of 1 T for material

up to 1/8" thick and 2 T for material thicker than 1/8".

Annealing Solution anneal at 1975 F for 8 hours and air cool.

Aging See "Heat Treat".

Hardening Hardens only by cold working.

Physical Data : [top]

Density (lb / cu. in.) 0.295

Specific Gravity 8.19

Specific Heat (Btu/lb/Deg F - [32-

212 Deg F])

0.11

Electrical Resistivity (microhm-

cm (at 68 Deg F))

746

Melting Point (Deg F) 2450

Thermal Conductivity 77

Mean Coeff Thermal Expansion 7

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Magnetic Permeability 1

Modulus of Elasticity Tension 30

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MSO currently has no data available for this grade.

Mechanical Data :

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