Principal Design Features		Designed primarily for low magnetic permeability, high yield strength and strong cryogenic properties.

Applications		A wide variety of cryogenic equipment including pipe and tube assemblies, valves, tanks and cable typify the applications of this alloy. It has also found use in a number of rotating parts such as fans and containment rings.

Machinability		Slow speeds, positive feeds and abundant resulphurized lubricant are essential to success in machining this alloy. Speeds and feeds similar to those employed with 316 or 317 stainless are appropriate here. All common machining practices can be used on this material. Chips will be tough and stringy and it is recommended that curlers or breakers are used.

Forming		All common forming techniques can be used with this alloy. Springback will be greater than with standard austenitics and should be taken into consideration when choosing the appropriate forming forces. Process annealing is recommended to remove stresses resulting from this alloys' high work hardening rate. Heat to 1950 F(1065 C) for intermediate anneal.

Welding		Pre-heating is not required with this material and all common welding methods including gas tungsten arc, gas metal arc and submerged arc are acceptable. Filler metal selection should be of similar chemistry for maximum strength and resistance to intergranular attack.

Forging		Heat to 2000 F, soak to equalize, then heat to 2150 and equalize prior to forging.

Annealing		Soak at 1900-2050 F, quench quickly in air or water.

Hardening		Hardening this alloy requires cold working. It will not harden with exposure to thermal treatment.

Physical Data : [top]

Density (lb / cu. in.)	0.28
Specific Heat (Btu/lb/Deg F - [32-212 Deg F])	0.11
Poissons Ratio	0.298
Modulus of Elasticity Tension	29

Form		Sheet
Condition		Annealed
Temper		70
Tensile Strength		115
Yield Strength		66
Elongation		49
Rockwell		B95
Form		Sheet
Condition		Cold Reduced 10%
Temper		132
Tensile Strength		100
Yield Strength		32
Rockwell		C29
Form		Sheet
Condition		Cold Reduced 20%
Temper		159
Tensile Strength		135
Yield Strength		19
Rockwell		C35
Form		Sheet
Condition		Cold Reduced 30%
Temper		185
Tensile Strength		168
Yield Strength		11
Rockwell		C40
Form		Sheet
Condition		Cold Reduced 40%
Temper		202
Tensile Strength		180
Yield Strength		7
Rockwell		C43
Form		Sheet
Condition		Cold Reduced 50%
Temper		210
Tensile Strength		190
Yield Strength		6
Rockwell		C45
Form		Sheet
Condition		Cold Reduced 60%
Temper		223
Tensile Strength		200
Yield Strength		5
Rockwell		C46