NHF-73G2

Specification

AWS Specification: N/A
JIS Specification: N/A
Other Specification: N/A

Description

NHF-73G2 is a low-hydrogen electrode for high-temperature resistant surfacings on hot work steels exposed to impact, compression, and abrasion
Great hardness and toughness
High temperature resistant

Application

Surfacing on machine components and tools exposed to abrasion and compression with moderate impact loads in operating temperatures up to 550ºC
Dead centers
Tongs
Valves
Hot shear blades
Extrusion press pistons
Dies
Cold and hot working tools

Remarks

Bigger workpieces must be preheated to 400-600�C and kept at this temperature during welding

A lower preheat temperature is enough for smaller work, because it is heated adequately by the arc

Certain jobs on smaller workpieces may even be welded without preheating

Slowly cool in an oven or under asbestos after welding

The weld can be machined only by grinding after it cools

If other cutting operations have to be performed on a build-up weld, annealing is necessary

Technical Data

TYPICAL CHEMICAL COMPOSITION OF ALL WELD METAL DEPOSITS (%):

C	Si	Mn	Cr	Mo
0.35	0.55	1.35	7.10	2.55

HARDNESS OF WELD METAL:

Hardness	Vickers (Hv)	Rockwell (H_RC)
As Welded	600 - 650	55 - 58
Soft Annealed	50	25
Hardened	640 - 740	56 - 60

SIZE AND RECOMMENDED CURRENT RANGE: AC, DC (+)

DIAMETER (mm)	3.2	4.0	5.0
LENGTH (mm)	350	350	350
Current Amp	80 - 110	100 - 140	130 - 170

Welding Positions:	FLAT, FILLET, VERTICAL UP
Approvals:	N/A

NOTE:

The information contained or otherwise referenced herein is presented only as “typical” without guarantee or warranty, and Industrial Welding Corporation expressly disclaims any liability incurred from any reliance thereon. Typical data and test results for mechanical properties, deposit, or electrode composition and other properties were obtained from a weld produced and tested according to prescribed standards and should not be assumed to be the expected results in a particular application or weldment. Actual results will vary depending on many factors, including, but not limited to, weld procedure, plate chemistry and temperature, weldment design, and fabrication methods. Users are cautioned to confirm by qualification testing, or other appropriate means, the suitability of any welding consumable and procedure before use in the intended application.