Smarter Cast Iron Welding | Discover Muggy Weld Solutions

At Muggy Weld, we have all of the welding supplies that you could need for any application, including a range of cast iron welding rods and other products suitable for use with cast iron. We bring you an extensive choice of products and ensure you have the necessary knowledge to improve and grow your business. Cast iron is a popular choice for welding projects due to its incredible versatility, which is why we make sure to stock products that provide for all the cast iron projects and tasks that you face.

About Muggy Weld

We are a family-owned and operated business that has been providing welding supplies for more than 30 years. Our high-quality products include alloys and electrodes suitable for tackling a number of different metals, from aluminum to cast iron and steel. We have designed our rod and flux combinations to work perfectly together and offer a high-quality finish for all applications. When you want to save time and money for your business, we can make it possible.

Cast Iron Welding

All welders will need to weld cast iron at some point in their careers. In fact, it's a metal that you're likely to come up against regularly due to its extreme popularity. Cast iron is strong, affordable, and durable, making it the ideal choice for a broad range of applications. It can pose issues due to its makeup, but welding it can be approached with ease as long as you have the right tools and supplies, and the necessary knowledge.

We make welding cast iron more manageable with our electrodes, which have been designed with a metallurgical composition that makes them well-suited to welding cast iron. While most nickel rods used by welders are harder than the base metal, making it tricky to work with cast iron, our electrodes are softer and highly machinable. They have been designed with unique properties so that the weld can stretch up to 300 percent more than other rods. The benefit of this is that the base metal and weld are protected, reducing the likelihood of cracking during welding.

Our cast iron welding products include silver solder rods for brazing cast iron (SSF6), as well as a syringe version of the silver solder (SSQ6). Our three electrodes, 77, 75, and 72, are also available for all of your cast iron welding needs. We aim to always provide innovative and high-quality products to our customers, suited to specific applications and addressing some of the challenges that welders can face.

Learn More from Our Cast Iron Welding Videos

Our Knowledge Center is full of valuable materials, providing you with the advice and knowledge that you need to improve your business operations. Take a look at our videos on cast iron welding to learn some new skills, get to know our cast iron welding rods and other products, and get some great tips on how to make the most of them.

	77 Non-Cracking Cast Iron Welding Rod	72 Burnt Cast Iron Welding Rod	75 Nickel Iron Rod for Malleable Ductile and Nodular Cast Iron	SSF-6 High Strength 56% Silver Solder

Sizes Available (in.)	5/32in, 1/8in, 3/32in	5/32in, 1/8in, 3/32in	3/32in, 1/8in, 5/32in	1/16in
Sizes Available (mm)	3.96mm, 3.17mm, 2.38mm	3.96mm, 3.17mm, 2.38mm	2.38mm, 3.17mm, 3.96mm	1.58mm
Arc - TIG - Braze	Arc - TIG	Arc - TIG	Arc - TIG	Braze
Works on engine blocks?	Yes	No	No	Yes
Works on large cast iron holes?	Yes	Yes	Yes	No
Joins cast iron to steel?	Yes	Yes	Yes	No
Joins cast iron to metals other than steel?	No	No	No	Yes
Works on exhaust manifolds, woodstoves, or other burnt cast iron?	Good	Great	No	Good
Works on thin cast iron?	Yes	Yes	Yes	Yes, even very thin
Color match?	Good	Good	Good	No
All position?	Yes	Yes	Yes	Yes
Machineable?	Yes	No	Yes	Yes
Paintable?	Yes	Yes	Yes	Yes
Works over existing welds?	Fair-- better on unwelded surface	Fair	Over nickel, yes	Great
Crack resistant?	Yes	No	No	Yes
Depth to bevel cracks	3/4 through	3/4 through	3/4 through	1/2 through

Cast Iron Welding Videos

Motor Mount Repair: Cast Iron 12 Valve Straight 6 Diesel Engine Repair

Muggy Weld 77 Cast Iron Welding Rods Fix a John Deere 1010 Loader

How to Weld a Cast Iron Marine Engine with Muggy Weld 77 Arc Rods

Use Muggy Weld Cast Iron Rods to Repair a Broken Cast Iron Vise

Muggy Weld Reviews/Testimonials from Customers

75 Cast Iron Welding Rods Repair a Cast Iron Tractor Steering Arm

Welding Cast Iron Basics: Test 72 & 77 Cast Iron Welding Rod Strength

How to TIG Weld Cast Iron w/ MuggyWeld 77 Cast Iron Rod

Weld Cast Iron with a MuggyWeld Cast Iron Repair Kit featuring 72 & 77

Muggy Weld Repairs: Customers' Before and After Photos

Muggy Weld: Premium Welding Rods for Welding, Brazing and Soldering

Welding Cast Iron Parts: Diesel Marine Blower Repair with 77

Welding Broken Cast Iron: Cast Iron Fireplace Stand Repair

Brazing Cast Iron Exhaust Manifolds with SSF-6 Silver Solder

Weld a Cast Iron Engine Block with Crack-Free 77

Weld a Cast Iron Exhaust Manifold with a Buzz Box

Weld an Engine Block with this Crack-Free Cast Iron Repair Kit

Cast Iron Welding Rods: Featuring Crack-Free 77

How to Weld a Front Axle on a Case Backhoe with 77 Electrode

How to Use Cast Iron Weld Rod to Repair a Stover Pump Base

Cast Iron Engine Block Welding with 77 Electrodes

Weld a Boat Exhaust Manifold: Boat Manifold Welding Tips

Cast Iron Repair Tips: How to Weld a Craftsman Mounting Bracket

How to Repair a Cast Iron Carburetor with Silver Solder

Silver Soldering a Cast Iron Flange to Aluminized Steel Tubing for RX 7

Cast Iron Exhaust Manifold Brazing with Silver Solder

How to Weld Dirty Cast Iron Parts with 72 Electrode