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NHF-SKD 61
AWS Specification:
JIS Specification:
Other Specification:

I. APPLICATIONS:

Hardfacing of piercing form, dies, forging molds, die casting molds, etc.

 

II. DESCRIPTION:

NHF-SKD 61 is a lime titania type electrode depositing air-hardenable weld metal whose composition is similar to alloy steel SKD-61 or AISI H 13 steel. Its weld metal has excellent toughness and crack resistibility . As its weld metal is excellent heat resistance and impact resistance, it is suitable for hard surfacing of metal dies which require the durability. But machining is impossible for its higher hardness as welded condition.

III. NOTES ON USAGE:

  • Preheat at 150ºC and over in general.

  • In the case of multi-layer build-up welding or hardenable steel welding, underlay with low hydrogen type electrode (N-7016 0r N-8016).

  • Dry the electrodes at 300~350ºC for 30~60 minutes before use.

 

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

 

C

Si

Mn

Cr

Mo

V

0.45

0.43

0.40

5.92

1.35

0.56

 

V. HARDNESS OF WELD METAL:

 

Welding Condition

Vickers (Hv)

Rockwell (HRC)

Shore (Hs)

As Welded

Continuous Welding

560 - 620

51 - 56

71 - 75

Preheating Interpass Temp. 150°C

580 - 660

54 - 58

72 - 79

 

VI. WELDING POSITIONS: FLAT, OVERHEAD, HORIZONTAL

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

 

Size

Dia.

3.2

4.0

5.0

(mm)

Length

350

350

350

Current Range

90-130

120-180

170-230

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.