HASTELLOY^® C-22^® alloy is readily welded by gas tungsten arc (GTAW), gas metal arc (GMAW), and shielded metal arc (SMAW) welding techniques. Its welding characteristics are similar to those for HASTELLOY C-276 and C-4 alloys. Submerged arc welding is not recommended as this process is characterized by high heat input to the base metal and slow cooling of the weld.

Base Metal Preparation
The joint surface and adjacent area should be thoroughly cleaned before welding. All grease, oil, crayon marks, sulfur compounds, and other foreign matter should be removed.

Filler Metal Selections
Matching composition filler metal is recommended for joining C-22 alloy. For gas-tungsten-arc and gas-metal-arc welding, C-22 filler wire (ER NiCrMo-10) is recommended. For shielded metal arc welding, C-22 covered electrodes (ENiCrMo-10; UNS W86022) are recommended. Detailed fabricating information for C-22 alloy is available in the booklet, Fabrication of HASTELLOY^® Corrosion- Resistant Alloys (H-2010) and C-22^® Alloy Welding Information (H-2066).

Average Transverse Tensile Data, Weldments*

Form		Test Temperature		Ultimate Tensile Strength, Ksi**	Yield Strength at 0.2% Offset, Ksi**	Elongation in 2 in. (50.8 mm), %
Form		°F	(°C)	Ultimate Tensile Strength, Ksi**	Yield Strength at 0.2% Offset, Ksi**	Elongation in 2 in. (50.8 mm), %
Sheet, 0.125 in. (3.2 mm) thick	GTAW	Room		108	61	30
		1000	(538)	79	40	23


Plate, 1/4 in. (6.4 mm) thick	GTAW	Room		116	56	60
		1000	(538)	88	36	51
	GMAW (short arc)	Room		111	57	43
	GMAW (short arc)	1000	(538)	85	39	46

Plate, 1/2 in. (12.7 mm) thick	GTAW	Room		114	65	47
		1000	(538)	86	45	52
		1400	(760)	71	39	30
	GMAW (short arc)	Room		109	63	38
	GMAW (short arc)	1000	(538)	82	45	38
		1400	(760)	63	39	25
	GMAW (spray)	Room		110	67	37
	GMAW (spray)	1000	(538)	80	45	33
		1400	(760)	68	41	27

Plate, 3/4 in. (19.1 mm) thick	SMAW	Room		111	56	58



Plate, 1.0 in. (23.4 mm) thick	GTAW (short arc)	Room		106	54	44
	GTAW (short arc)	752	(400)	92	38	48
	GMAW (spray)	Room		109	56	51
	GMAW (spray)	752	(400)	93	35	59

Plate, 1.5 in. (46.1 mm) thick	GMAW (short arc)	Room		109	56	54
	GMAW (short arc)	752	(400)	92	38	59

Average of 3-9 tests *Ksi can be converted to MPa (megapascals) by multiplying by 6.895

Average Tensile Data, All-Weld Metal*

Weld Type	Test Temperature		Ultimate Tensile Strength, Ksi**	Yield Strength at 0.2% Offset, Ksi**	Elongation in 2 in. (50.8 mm), %
Weld Type	°F	(°C)	Ultimate Tensile Strength, Ksi**	Yield Strength at 0.2% Offset, Ksi**	Elongation in 2 in. (50.8 mm), %
GTAW	Room		113	76	47
	500	(260)	94	60	52
	1000	(538)	187	57	51
GMAW	Room		113	72	52
(short arc)	500	(260)	94	60	52
	1000	(538)	84	54	55
SMAW	Room		110	74	47
	752	(400)	87	56	49
Average 10-20 tests. *Ksi can be converted to MPa (megapascals) by multiplying by 6.895

Average Impact Strength, Weldments

Condition		*V-Notch Impact Strength**
		Room Temperature		-320°F (-196°C)
		ft.-lb.	Joules	ft.-lb.	Joules
Plate, 1/2 in. (12.7 mm) thick	GTAW	148	201	111	150
	GMAW (short arc)	135	183	97	131
	GMAW (spray)	144	195	118	160
Plate, 3/4 in. (19.1 mm) thick	GTAW	148	201	118	160
	GMAW (short arc)	121	164	115	156
	GMAW (spray)	149	202	102	138
	SMAW	76	103	53	72
*Notch was located in the center of the weldment on the transverse edge.

Typical Bend Test Data, Welded Plate*

Weld Type	Face Bend, 2T	Side Bend		Root Bend, 2T
		2T	1 1/2T
GTAW	Passed	Passed	Passed	Passed
GMAW (short arc)	Passed	Passed	Passed	Passed
GMAW (spray)	Passed	Passed	Passed	Passed
SMAW	Passed	Passed	-	Passed
*Duplicate specimens, 1/2 in. (12.7 mm) thick. Tested using AWS Specification 5.11 as a guide.

Room Temperature Tensile Data of Weldments After Thermal Aging

Welding Method	Condition	Specimen	Ultimate Tensile Strength, Ksi**	Yield Strength at 0.2% Offset, Ksi**	Elongation in 2 in. (50.8 mm), %
GTAW	As Welded	Unnotched	114	58	60
	Aged 4000 hrs. at 842°F (450°C)	Unnotched	114	59	60
	As Welded	Notched	147	84	-
	Aged 4000 hrs. at 842°F (450°C)	Notched	152	85	-

GMAW	As Welded	Unnotched	106	54	44
	Aged 4000 hrs. at 842°F (450°C)	Unnotched	110	55	58
	As Welded	Notched	146	82	-
	Aged 4000 hrs. at 842°F (450°C)	Notched	150	86	-
*Ksi can be converted to MPa (megapascals) by multiplying by 6.895.

Average Impact Strength, Weldments

Method	Condition	V-Notch Impact Strength
		Room Temperature		-320°F (-196°C)
		ft.-lb.	Joules	ft.-lb.	Joules
GTAW	As Welded	148	201	118	160
	Aged 4000 hrs. at 842°F (450°C)	124	168	-	-
	Aged 4000 hrs. at 842°F (450°C)
GMAW	As Welded	144	195	106	144
	Aged 4000 hrs. at 842°F (450°C)	124	168	106	144
	Aged 4000 hrs. at 842°F (450°C)

Dissimilar Weldment Mechanical Data, All-Weld Metal, Room Temperature

Weld Type	Base Metal	Weld Metal	Ultimate Tensile Strength, Ksi**	Yield Strength at 0.2% Offset, Ksi**	Elongation in 2 in. (50.8 mm), %	V-Notch Impact Strength ft.-lb.
GTAW	316L	C-22	115	84	40	121
SMAW	316L	C-22	113	73	41	58
GTAW	904L	C-22	113	74	44	136
SMAW	904L	C-22	110	72	44	61
GTAW	C-22	C-22	113	76	47	148
SMAW	C-22	C-22	113	71	43	60
*Ksi can be converted to MPa (megapascals) by multiplying by 6.895.

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

HASTELLOY® C-22® alloy Information*

HASTELLOY^® C-22^® alloy Information*