Not logged inAmerican Welding Society Forum
Forum AWS Website Help Search Login
Up Topic Welding Industry / General Welding Discussion / Cast Iron Welding
- - By qcmike (**) Date 08-26-2004 13:55
Hi Guys,

I am preparing a WPS for bridge repairs. It is cast steel to carbon steel stiffener repairs, all fillet welds. I am waiting for my AWS D11.2-89 (guide to cast welding) to come in tommorrow.

As usual the engineer specified D1.5 for the cast to steel WPS. Obviously this will not apply.

Has anyone had any luck passing a fillet weld break test on cast steel using SMAW? Any suggestions on welding gray cast would be helpful, i.e. preheat.

Thanks,

Mike
Parent - - By GRoberts (***) Date 08-26-2004 14:56
Your first item of business should be to figure out what material you have. Your question mixes cast iron and cast steel terms, and they are two completely different animals. Welding is not normally a problem with cast steel, as most cast steel grades are readily weldable. If the part is cast iron, it is a much different story. As you will find when you recieve your AWS guide to welding iron castings, some grades are weldable, and some aren't.
Parent - - By qcmike (**) Date 08-26-2004 17:13
Thanks for the response. I did misstype. The rail beam is a weldable common "gray cast iron". It has already been welded to in the past. I will not be able to get the exact ASTM Spec. The bridge is too old.

Parent - - By swnorris (****) Date 08-27-2004 11:58
Hi qcmike,

ASTM A48 is the specification for gray iron castings. Gray cast irons are iron/carbon/silicon alloys that contain uncombined carbon in the form of graphite flakes. This type of cast iron is named from the gray appearance of a fractured surface. Gray cast iron lacks ductility because of the flake form of the graphite. Since the graphite contains virtually no strength, the numerous flakes create internal notches in the steel matrix. Fracture can initiate easily at these sites and progress rapidly across the section without plastic strain. The recommended preheat and interpass temperature range for arc welded gray cast iron as published by the AWS is 70-600 degrees Fahrenheit, and 800-1200 for oxyacetelyne welding. Obviously, the preheat temperature range and extent of preheating depends on the type of cast being welded, the mass of the casting, the welding process, and the type of filler metal, which is the reason for such a wide range for arc welding. To ensure proper control, the preheat and interpass temperatures should be closely monitored using devices such as pyrometers, temperature sensitive crayons, or thermocouples.
Parent - By harleyhitman (**) Date 01-15-2005 03:19
Cronatron 211 is the electrode for the job.

“THE CAST IRON PROBLEM SOLVER”
Unquestionably the final answer to the most difficult cast iron repair welding. This highly sophisticated
alloy allows repairs that were previously impossible.
IDENTIFICATION: Printed Electrode, TIG Flagged One End
APPLICATION: AC or DC Reverse Polarity
CRONACAST 211 SUPERIOR ADVANTAGES:
• HIGH TENSILE WELDS IN EVERY TYPE OF CAST IRON, INCLUDING GREY AND
MEEHANITE; ALSO PRODUCES EXCELLENT STEEL TO CAST IRON WELDS
• CRONAMIG 211 IS FULLY MACHINABLE AND HAS A HIGH ELONGATION
FACTOR WHICH POSITIVELY PREVENTS CRACKING
• PASS OVER PASS WELDING WITHOUT SLAG REMOVAL BETWEEN PASSES
• ALL POSITION WELDING CAN BE DONE WITH CRONAMIG 211 WITH NO
DISMANTLING OF EQUIPMENT PARTS
TECHNICAL INFORMATION:
TENSILE STRENGTH: 70,000 PSI (483 MPa)
BRINELL HARDNESS: 185-240
OPERATING PROCEDURES:
Use AC or DC reverse polarity. Generally, where a narrow, thin
bead is desired a straight polarity application is suggested.
APPLICATIONS:
• GEAR TEETH • PUMP IMPELLERS
• SPROCKETS • CAST IRON TO STEEL
• PUMP HOUSINGS • CYLINDER BLOCKS AND HEADS
• BEARING HOUSINGS • TRANSMISSION CASES
• TURBINES • HYDRAULIC PRESS RAMS
CONFIDENTIAL MATERIAL, REPRODUCTION, IN WHOLE OR IN PART, PROHIBITED Printed in U. S. A. (Rev. 7/ 02)
PART
NO.
CW1035
CW1034
CW1033
CW1032
ELECTRODE
SIZE
3/32
1/8
5/32
3/16
AMPERAGE
55-95
75-110
120-150
140-175
COMBO PAC . . . . . . . . CW1725
PART NO.
CW1901
CW1902
CW1903
SIZES
CRONATIG™ 211T
1/16 x 36
3/32 x 36
1/8 x 36
TECHNICAL INFORMATION
CRONATRON WELDING SYSTEMS, INC.
CRONACAST ™ 211
CRONAMIG 211M-FC CRONATIG ™ 211T
PART NO.
CW2065
CW2066
CW2057
CW2058
CW2059
SIZES
CRONAMIG™ 211M-FC
.035 x 10 lbs.
.035 x 33 lbs.
.045 x 10 lbs.
.045 x 33 lbs.
.062 x 33 lbs.
WE 14 Corporate, Research & Distribution Hdqrs: 6510 Northpark Blvd. Charlotte, NC 28216-2367/ 800-843-0763/ www.cronatronwelding.com
Return to Index
Up Topic Welding Industry / General Welding Discussion / Cast Iron Welding

Powered by mwForum 2.29.2 © 1999-2013 Markus Wichitill