Sheet Metal Working

Soldering and Riveting

Types of Sheet Metal

• Steel (Ferrous)

• Non-Steel (Non-Ferrous)

Steel Sheet Metal

• Galvanized

• Stainless

• Tin Plate

Non-Steel Sheet Metal

• Copper

• Aluminum

• Lead

• Zinc

Galvanized Sheet Metal

• Soft steel sheet covered with a zinc coating

• Has a dull appearance

Galvanized cont’d.

• Zinc coating provides a corrosive resistance

• Relatively inexpensive

Galvanized cont’d.

• Used for many purposes•Roofing•Ductwork

•Gutters

•Signs

•Posts

Stainless Steel Sheet Metal

• High grade steel covered with a coating of chromium and nickel

• Has high corrosive properties• Cleans easily

Stainless Steel cont’d.

• Has a silver/chrome appearance

• Very tough to bend

Stainless Steel cont’d.• Will last

“forever”• Very

expensive• Used for many

purposes

•Food/dairy industry

•Sinks•Tables•Grills•Utensils

Tin Plate Sheet Metal

• Steel coated with pure tin• Once widely used for sinks,

cans, food/dairy industry• Mainly replaced by

stainless steel

Copper Sheet Metal

• High corrosive resistance

• Used mainly in roofs and gutters

• Very expensive

Aluminum Sheet Metal• Good

corrosive resistance

• Very light weight

• Durable

• Used for•Gutters and spouts

•Siding•Wheels and rims

•Cans

Lead Sheet Metal

• One of the oldest sheet metals

• Used for thick tanks and radiation areas

• X-ray proof

Soldering

• The joining of two or more pieces of metal by using an alloy with a lower melting point than the pieces being joined

The Make-Up of Solder

• Tin % / Lead %

• Examples:

•50/50

•60/40

•95/5

•Lead Free Solder

The Make-Up of Solder cont’d.

• As you increase the Tin %, the melting point of the solder is lowered

Flux• Removes/Cleans the oxide

film from the surface of metal• Solder would not “stick”

without the use of flux• May come in many different

forms

Types of Flux

• Acid Flux

•Hydro-chloric

•Cut Acid

• Rosin Flux

•Powder

•Paste

•Liquid

Soldering Tools/Equipment

• Solder• Electric

Soldering Gun

• Sal Ammoniac Block

• Flux• Gas Bench

Furnace• Propane Torch• Soldering

Copper

Riveting Metal

• Fastening device that is held in place by spreading one or both ends

• Fastened by using a rivet set or by peining

Types of Rivets

• Pop Rivet

• Brass Rivet

• Copper Rivet

• Iron Rivet

• Aluminum Rivet

Drilling Holes for Riveting

• Holes drilled in thicker metal are made with a portable drill, or better yet a drill press

• Uses high speed twist drill bits which are hardened for use in metal