NAS HX (UNS N06002), comparable to Hastelloy^® X Alloy

Chemical Composition

JIS H4551 / NW6002

	C	Si	Mn	P	S	Ni	Cr	Mo	Co	W	Fe	B
Min	0.05	―	―	―	―	―	20.5	8.0	0.5	0.2	17.0	―
Max	0.15	1.0	1.0	0.040	0.030	Balance	23.0	10.0	2.5	1.0	20.0	0.010

ASTM B435 / UNS N06002

	C	Si	Mn	P	S	Ni	Cr	Mo	Co	W	Fe	B
Min	0.05	―	―	―	―	―	20.5	8.0	0.5	0.2	17.0	―
Max	0.15	1.00	1.00	0.04	0.03	Balance	23.0	10.0	2.5	1.0	20.0	―

SAE AMS 5536

	C	Si	Mn	P	S	Ni	Cr	Mo	Co	W	Fe	B
Min	0.05	―	―	―	―	―	20.50	8.00	0.50	0.20	17.00	―
Max	0.15	1.00	1.00	0.040	0.030	Balance	23.00	10.00	2.50	1.00	20.00	0.010

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Physical Properties

Specific heat (J/kg･K)		434
Specific resistivity (μΩ･cm)		113
Thermal conductivity (W/m･K)		10.9
Coefficient of thermal expansion (10-6/℃)	25–200℃	13.9
	25–400℃	14.5
	25–600℃	15.0
	25–800℃	15.9
	25–1000℃	16.7
Young's modulus (MPa)		19.5 x 104
Ferromagnetism		None
Melting point (℃)		1290-1365

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Mechanical Properties

Mechanical Properties at Room Temperature

JIS H4551 / NW6002

0.2% Yield strength (N/mm2)	Tensile strength (N/mm2)	Elongation (%)	Hardness
			(HV)	(HR)
≥ 245	≥ 660	≥ 35	―	―

ASTM B435 / UNS N06002

0.2% Yield strength (N/mm2)	Tensile strength (N/mm2)	Elongation (%)	Hardness
			(HV)	(HR)
≥ 240	≥ 655	≥ 35	―	―

SAE AMS 5536

0.2% Yield strength (N/mm2)	Tensile strength (N/mm2)	Elongation (%)	Hardness
			(HV)	(HR)
≥ 310	≥ 724	≥ 35	―	―

Examples

	0.2% Yield strength (N/mm2)	Tensile strength (N/mm2)	Elongation (%)	Hardness
				(HV)	(HR)
Hot-rolled sheet, 6-mm thick	388	772	40	―	204
Cold-rolled sheet, 1.2-mm thick	369	777	45	183	―

Impact Value

	Aging treatment	Testing temp. (℃)	Impact value (J/cm²)
Solution-treated NAS HX	Not applied	-196	138
		-78	162
		Room temp.	184
NAS HX solution treated, then aged	816℃ for 50 hr	Room temp.	53
	816℃ for 150 hr	Room temp.	45
	816℃ for 500 hr	Room temp.	41

High-Temperature Strength

Properties at High Temperatures

High-Temperature, Brief Pull

Creep Rupture Test

SAE AMS 5536

Testing temp. (℃)	Load (MPa)	Rupture time (hr)	Rupture elongation (%)
816	110	24	8

Examples

	Testing temp. (℃)	Load (MPa)	Rupture time (hr)	Rupture elongation (%)
Hot-rolled sheet, 35t	816	110	63	76
Hot-rolled sheet, 12t	816	110	77	97
Cold-rolled sheet, 3t	816	110	93	79
Cold-rolled sheet, 1.2t	816	110	67	74

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Workability

Formability

A formability test was performed on a sheet of solution-treated NAS HX 1.5-mm thick with number 2B finishing.
NAS HX is easily formed with cold rolling.

Erichsen value (mm)	Limited drawing ratio
10.3	2.10

Bendability

A 180° bending test to demonstrate the bending radius 2t (t being the nominal thickness) was performed on a sheet of solution-treated NAS HX 3-mm thick with number 2B finishing.

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Heat Treatment

The recommended solution treatment temperature is between 1149 and 1177℃, the range stipulated in SAE AMS5536.
Rapid cooling is required after heat treatment to prevent precipitates from forming.

Workability

We recommend using a range of 982 to 1177℃ for hot working NAS HX.

NAS HX can also be easily worked using cold rolling. Note that a greater force is required to work NAS HX than standard austenitic stainless steels.
Whatever process is used, solution treatment should be applied afterward to obtain favorable creep properties.

Weldability

NAX HX is a good product for welding. Such techniques as TIG, MIG and shield metal arc welding can be used as with standard austenitic stainless steels.
Before welding, the weld surface should be cleaned of oxidizing scales as well as oil and dirt.

Applications

Gas turbine heat chambers; afterburner tail pipes and other components; heating furnace fans, rollers, trays, hardware and other parts.