GRINOX 175 E 630-16
AWS/SFA 5.4 E 630-16
A rutile basic coated special electrode Developed for welding high strength martenstic precipitation hardening steels. The deposited weld metal is of X-ray quality.
WELD METAL ANALYSIS (RANGE) %
MECHANICAL PROPERTIES (TYPICAL)
After PWHT, 1035+10°C for 1 hr, and then Precipitate hardening at 610-630°C for 4 hrs Followed by air cooling to ambient temperature.
For welding high strength martenstic stainless steels, precipitation hardened by additions of copper.
Application include :
• Pump Shafts
• Hydraulic Equipment
Used in :
• Oil & Gas Industries
• Petro-Chemical Plants
• Marine & Nuclear Engineering
• Custom 630 (Carpenter Technology)
• ASTM A747 CB-7Cu-1, CB-7Cu-2 (cast alloys)
MATERIALS TO BE WELDED
Precipitation hardening steel such as :
• ASTM type 630
• 17-4PH (Armco Steel)
MICROSTRUCTURE : In the PWHT condition the microstructure consists of precipitation hardened tempered martensite with some retained austenite.
REDRYING : 300°C / 2 hrs. max 5 cycles, 10 hr. total.
WELDING POSITION :