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Welding/high mangeneese welding

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Question
I will be trying to repair a grapple fork from a Farmhand loader. I was told it could be a high mangeneese alloy. It definitely has a "flowery" spark when you put oxy/acetylene flame to it. I have the broken tooth beveled and ground smooth ready to repair. Should I use the Hobart 11018 rod I have, or is there a better rod for this alloy?

Answer
Sorry for the late reply.
I am currently working as a weld inspector on 12 hour night shifts at a Boeing plant.

Forks are usually made from 4340 steel.

11018 is a bit high tensile but should work.
9018 or 10018 might be more reasonable.

The important bit is preheat and slow cool.
You will need to keep the pieces warm between passes (inter-pass temperature).
A weed burner works well for this.

Buy a tempilstik at a welding store for 300 degF.
Preheat your steel to 300 and start welding , make sure you maintain that temp between passes.
When done, slow cool the joint by wrapping in welding blankets, or burying in sand, ash or vermiculite.  

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Ernie Leimkuhler

Expertise

Questions about Oxy-Acetylene welding/cutting, MIG, TIG, Flux-core, Stick welding, brazing and soldering, bike frames, air frames, motorcycle frames, structural welding. Also questions about Welding Certifications and Inspections. All questions about fabrication of metals (stainless steel, steel , aluminum, brass, bronze, copper). Basic questions about underwater welding. TIG is my strongest subject.

Experience

Extensive background in most welding fields. 18 years fabrication of metal theatre scenery, 16 years structural steel, 2 years pipe welding, 9 years as a Welding Instructor at South Seattle Community College, and 5.5 years as a Welding Instructor at the Divers Institute of Technology. 16 years Industrial Welding Consultant for fabrication shops in the greater Seattle Area. 11 years Architectural Metal Fabrication. 8 years in Film/TV; SPFX/construction/set-deco/props/. 33 years Blacksmithing and Knifemaking. Currently a Field Welding Inspector for Otto Rosenau and Associates.

Organizations
American Welding Society - Certified Welding Inspector Washington Assoc of Building Officials (WABO) - Special Inspector - Structural and Reinforcing Steel.

Publications
Do a search on google groups for "Ernie Leimkuhler" in the rec.crafts.metalworking and sci.engr.joining.welding groups. http://www.stagesmith.com/ http://www.metalwebnews.com/ Blacksmith's Gazzette - Anvil Making

Education/Credentials
BA Theatre Technology - Purdue University.

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