NHF-700B

Specification

AWS Specification: N/A
JIS Specification: DFA-700R
Other Specification: N/A

Description

NHF-700B is a rutile type electrode that deposits an air hardening martensitic Cr-Mo –V alloy, exhibiting high abrasion resistance, and able to maintain a cutting edge
Gives smooth, stable arcing with low spatter, and is characterized by a uniform well built-up deposit
Excellent slag detachability
Weld metal deposit can be readily hot forged and offers excellent resistance to all types of abrasion under moderate to low impact conditions

Application

Poste hole augers
Agricultural points and shares
Grader blades
Ripper teeth
Components previously hardened by carburizing

Remarks

Preheat at 200�C and over

Apply postweld heat treatment at about 600�C

Under-layer welding with low hydrogen type electrode for mild steel is needed

Dry the electrodes at 300-350�C for 30-60 minutes

In the "as welded" condition, NHF-700B weld metal cannot be machined without prior heat treatment

Technical Data

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

C	Si	Mn	Cr	Mo
0.51	0.23	0.31	5.50	5.20

HARDNESS OF WELD METAL:

Hardness	Vickers (Hv)	Rockwell (H_RC)
Value	640 - 720	57 - 61

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

DIAMETER (mm)	3.2	4.0	5.0	6.0
LENGTH (mm)	350	350	350	350
Current Amp	90 - 130	120 - 180	170 - 230	210 - 280

Welding Positions:	FLAT, OVERHEAD, HORIZONTAL
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.