Wrought HAYNES^® 282^® alloy is furnished in the solution annealed condition unless otherwise specifi ed. After component fabrication, the alloy would normally again be solution annealed at 2050 to 2100°F (1121 to 1149°C) for a time commensurate with section thickness and rapidly cooled or water-quenched for optimal properties. Following solution annealing, the alloy is given a two-step age-hardening treatment to optimize the microstructure and induce age-hardening. The fi rst step is 1850°F (1010°C) for 2 hours followed by rapid or air cooling. The second step is 1450°F (788°C) for 8 hours followed by air cooling.

Hot and Cold Working

HAYNES 282 alloy has excellent forming characteristics. It may be hot-worked at temperatures in the range of about 1750-2150°F (955-1177°C) provided the entire piece is soaked for a time sufficient to bring it uniformly to temperature. Initial breakdown is normally performed at the higher end of the range, while finishing is usually done at the lower temperatures to afford grain refinement.

As a consequence of its good ductility, 282 alloy is also readily formed by cold-working. Intermediate annealing may be performed at 2050 to 2100°F (1121 to 1149°C) for a time commensurate with section thickness and rapidly cooled or water-quenched, to ensure maximum formability. All hot- or cold-worked parts should normally be annealed prior to age-hardening (as described in the “Heat Treatment” section) in order to develop the best balance of properties.

Cold Forming Characteristics

Average Room-Temperature Hardness and Tensile Properties of Solution Annealed HAYNES^® 282^® alloy

Form	Hardness	0.2% Yield Strength		Ultimate Tensile Strength		Elongation	R.A.

	Rb	ksi	MPa	ksi	MPa	%	%

Sheet	90	56	384	122	839	59	-
Plate	93	56	384	120	830	60	61
Bar	86	51	348	118	816	62	69

Hardness vs. Cold Work (Sheet)


Alloy	0%	10%	20%	30%	40%	50%

282^® alloy	93 Rb	26 Rc	33 Rc	38 Rc	41 Rc	43 Rc
R-41 alloy	96 Rb	30 Rc	36 Rc	39 Rc	41 Rc	42 Rc
Waspaloy alloy	94 Rb	26 Rc	32 Rc	37 Rc	39 Rc	41 Rc
263 alloy	89 Rb	19 Rc	27 Rc	33 Rc	37 Rc	39 Rc
625 alloy	97 Rb	32 Rc	37 Rc	40 Rc	42 Rc	45 Rc

Hardness of Solution Annnealed Sheet Versus % Cold Work

Effect of Cold Reduction on Room-Temperature Tensile Properties*

Cold Reduction	0.2% Yield Strength		Ultimate Tensile Strength		Elongation

%	ksi	MPa	ksi	MPa	%

0	55.5	383	121.0	834	58.0
10	87.8	605	131.8	909	46.7
20	114.5	790	144.9	999	31.5
30	139.7	963	165.4	1141	15.5
40	158.5	1093	184.2	1270	8.9
50	174.7	1204	200.4	1382	6.6
60	190.4	1312	215.4	1485	5.6

*Based upon rolling reductions taken upon a solution annealed 0.125” (3.2 mm) thick sheet

Machining

HAYNES 282 alloy has similar machining characteristics to other nickel alloys used at high temperatures. Rough machining should be carried out prior to age-hardening, using the following guidelines. Final machining or finish grinding may be done after age-hardening. If further information is required, please contact the technical support group at Haynes International.

Normal Roughing (Turning/Facing)

Use carbide C-2/C-3 grade tool	Speed: 90 surface feet/minute
Feed: 0.010"/revolution	Depth of Cut: 0.150"
Lubricant: Dry 2 , oil 3 or water-base 4,5
Negative rake square insert, 45° SCEA 1 0.03125" nose radius.
Tool holder: 5° negative back and side rakes.

Finishing (Turning/Facing)

Use carbide C-2/C-3 grade tool	Speed: 95-110 surface feet/minute
Feed: 0.005-0.007"/revolution	Depth of Cut: 0.040"
Lubricant: Dry or water-base
Positive rake square insert, if possible, 45° SCEA, 0.03125" nose radius.
Tool holder: 5° positive back and side rakes.

Drilling

Use high speed steel M-33/M-40 series6/or T-15 grades*
Speed: 10-15 surface feet/minute (200 RPM maximum for 0.25" diameter or smaller)
Feed (per revolution):	0.001" rev. 0.125" dia.
	0.002" rev. 0.25" dia.
	0.003" rev. 0.5" dia.
	0.005" rev. 0.75" dia.
	0.007" rev. 1" dia.
Lubricant: Oil or water-base. Use coolant feed drills if possible.
Short, heavy-web drills with 135° crank shaft point. Thinning of web at point may reduce thrust.

* Carbide drills not recommended, but may be used in some set-ups. See Haynes International publication H-3159 for details.

Notes:	1	SCEA-Side cutting edge angle, or lead angle of the tool.
	2	At any point where dry cutting is recommended, an air jet directed on the tool may provide substantial tool life increases. A water-base coolant mist may also be effective.
	3	Oil coolant should be a premium quality, sulfochlorinated oil with extreme pressure additives. A viscosity at 100°F from 50 to 125 SSU is standard.
	4	Water-based coolant should be a 15:1 mix of water with either a premium quality, sulfochlorintated water soluble oil or a chemical emulsion with extreme pressure additives.
	5	Water-based coolants may cause chipping or rapid failure of carbide tools in interrupted cuts.
	6	M-40 series High Speed Steels include M-41 through M-46 at time of writing. Others may be added, and should be equally suitable.

Haynes International, Inc. 800-354-0806 765-456-6012

HAYNES® 282® alloy Information

A new, wrought, age-hardenable, nickel superalloy designed for improved creep strength, weldability, and fabricability.

HAYNES^® 282^® alloy Information