NHF-670

Specification

AWS Specification: N/A
JIS Specification: N/A
Other Specification: DIN 8555: E6-UM-60

Description

NHF-670 is a high-efficiency electrode for hardfacing workpieces of steel, cast steel, or high Mn-steel that are subject to simultaneous wear by impact, compression and abrasion
Due to its recovery, this electrode is ideally suited for for economic one-layer applications

Application

Crane wheels
Rollers
Chain links
Sprocket wheels
Gliding surfaces
Screw conveyors
Beaters
Edge runners
Guide wheels

Remarks

Hold electrode as vertically as possible and keep a short arc

Preheating is generally not necessary

For multipass applications it is advisable to weld cushion layers with NHF-300 and to apply NHF-670 for the last 3 layers

Preheating temperature of high Mn-steels should not exceed 250�C

Electrodes that have abosrbed moisture should be re-dried for 2 hours at 300�C

Technical Data

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

C	Si	Mn	Cr	Mo	V	Fe
0.40	1.00	1.00	9.50	0.60	1.5	Bal.

HARDNESS OF WELD METAL:

Hardness	Vickers (Hv)	Rockwell (H_RC)
Value	690	58

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

DIAMETER (mm)	3.2	4.0	5.0
LENGTH (mm)	350	350	350
Current Amp	90 - 120	130 - 160	170 - 210

Welding Positions:	FLAT, OVERHEAD, HORIZONTAL, 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.