Aluminium alloys or steels
It's used in the motor that makes the washing machine work. If you're talking about "laundry balls," it's used as a marketing technique to get people to buy a worthless product at an inflated price.
a wringer washing machine wash board A washboard
Steel
If you mean the soap there is no metal used.
Roll forming is a type of sheet metal forming. The machine is used to complete this function. A flat sheet of metal is fed through the machine and formed into a roll.
A lathe is a machine that is used to carve wood or metal by turning it.
Special steels
The laundry water valve in a washing machine controls the flow of water into the machine during the wash and rinse cycles. It opens to allow water to enter the machine when needed and closes to stop the flow of water when the desired level is reached. This helps regulate the amount of water used in each cycle and ensures proper cleaning of the clothes.
If you mean the part of the dishwasher other than the door, it's made of either plastic or stainless steel (whatever the inside is made of, that's the same as the outside). If you mean the door, either painted steel or stainless steel.
A laundry booster is a product that is added to laundry detergent to enhance the cleaning performance. It helps to remove tough stains, eliminate odors, and brighten colors in clothes. Laundry boosters often come in the form of powders or liquids and are used in conjunction with regular detergent during the washing cycle.
a basket that is used for laundry
A nibbling machine is a tool used for cutting intricate shapes in sheet metal. It functions by cutting small notches or holes in the metal using a punching and die mechanism. It is commonly used in industries such as automotive, aerospace, and metal fabrication for tasks like making holes, notches, and other detailed cuts in sheet metal.