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NB-GCR gray cast (bare)
AWS Specification: NA
JIS Specification:

NA

Other Specification:

CAST IRON round shape

NB-GCR

Gas Welding for Gray Cast Iron 

GENERAL CHARACTERISTICS:

 

NB-GCR cast iron welding rods are used with NFC-4 brazing flux. Deposits are easily machined and have excellent color match to gray cast iron. They also rust like cast iron and, therefore, machined repairs are not noticeable.

APPLICATIONS:

 Torch welding for maintenance and production of heavy and light castings. Commonly used on parts where color match is critical such as filling of surface defects and building up worn or missing sections. Also used to repair machine bases, engine blocks, cylinder blocks, cylinder heads, and gear housings..

 TECHNICAL DATA:

Tensile Strength..................................................................up to 40,000 psi (275 N/mm²)

Hardness (HB) …................................................................approx. 200

Color Match.........................................................................excellent

Working Temperature ….....................................................1600ºF (870ºC)

Diameter

3/16" , ¼" , 5/16" , 3/8" inches

5.0 / 6.4 / 8.0 / 9.5 mm

PROCEDURE:

Remove rust, dirt, and grease by chiseling or grinding. Bevel heavy sections to form a 75º vee. Always use a slightly carburizing flame to prevent porosity due to oxidation of carbon. Preheat part to 800ºF (430ºC) before starting to weld. Heat end of rod, dip into NFC-4 brazing flux, and transfer to weld area. Melt off a small amount of rod, continue heating until deposit flows out. Add filler metal a drop at a time making sure each deposit is fused to the base metal; use sufficient flux for good cleaning and protection. After welding allow part to cool slowly to prevent hardening and cracking.

PDS 10/10