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NHF-630
AWS Specification: E307-16
JIS Specification:

DIN 8555 E8-UM-200-KRZ

Other Specification:

I. APPLICATIONS:

High efficiency electrode with a recovery for welding steels with more than 0.6% carbon and other difficult combinations.  Deposits the most ductile of weld metals, the optimum for applications involving high weld shrinkage stresses and impact loading.  Recommended buffer layers before hardfacing on all steels because of work hardening properties up to 350 HB. 
 

II. DESCRIPTIONS:

NHF-630 is easily weldable with stable arc, homogeneous, finely rippled bead appearance and gives good slag removal. The fully austenetic weld metal is resistant to rust and scale up to 850°C work-hardening. 
 

III. NOTES ON USAGE:
 

  • Clean welding area thoroughly

  • Pre heating of thick walled ferritic parts to 150 - 250 °C

  • Hold electrode vertically with a short arc

  • Re-dry electrodes for 2 hours at 25-300 °C 

IV. TYPICAL CHEMICAL COMPOSITION OF WELD METAL (%):

 

C

Si

Mn

Cr

Ni

Mo

0.10

0.80

6.00

19.00

9.00

0.90

V. TYPICAL MECHANICAL PROPERTIES OF WELD METAL DEPOSIT :

 

0.2% Yield Strength

N/mm2 (ksi)

Tensile Strength

N/mm2 (ksi)

Elongation

%

350 (51)

600 (87)

40

VI. WELDING POSITIONS: ALL POSITIONS

VII. SIZES AVAILABLE AND RECOMMENDED CURRENTS (AC or DC+ ):

 

Size

Dia.

2.5

3.2

4.0

5.0

(mm)

Length

350

450

450

450

Current Range

80-100

130-160

160-200

150-200

 TEST RESULT

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.