Stainless Steel
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Properties
- Corrosion-resistant
- High tensile strength
- Very durable
- Temperature resistant
- Easy formability and fabrication
- Little to no maintenance costs
- Expected life cycle duration: 20 years
- Variety of finishes
- Alloy of iron and carbon
- Other added elements include chromium
(minimum 10.5%), nickel, magnesium,
molybdenum, and nitrogen
Production
1. Melting/Casting: elements melted
together in a large furnace and cast into
desired forms (commonly slabs, blooms,
billets, rods, and tubes)
2. Forming: hot rolled into strips or sheets,
or formed into bar or wire
3. Heat Treatment: heated and cooled to
relieve stress and soften it to make it
usable for different applications
4. Descaling: the film that formed on the
surface is removed through a variety of
processes
5. Cutting: forms are cut into desired
shapes using guillotine knives, blanking,
nibbling, and/or high-speed blades
6. Finishing: the final product is finished to
create its attractive appearance - can be
coated, polished, or brushed
Environmental Impact
- 100% recyclable
- Scrap can be reused to make products of
the same quality
- No limit of recycled content
- No toxic coatings or runoff
- No effect on soil or groundwater
- 70% sourced from recycled materials
- Life Cycle Costs:
- High initial purchasing price ($1.25
per pound)
- Duration of life cycle: 20 years
- Maintenance Costs: little to none
Source
- Formed by melting together iron ore, carbon, chromium, and other alloying elements
- Different proportions of elements create different grades of stainless steel
- Ratio of iron affects the strength of the oxide layer and resistance to corrosion (more iron=less resistant)
Maintenance
- While maintenance costs are very low, there is some needed to avoid discoloration
- Must be kept clean to maintain corrosion resistance
- Can be cleaned by using soap or mild detergent with warm water, applied with a soft cloth or synthetic sponge
- Stainless steel can scratch so it is important to use gentle cloths or sponges
Application
-All stainless steel must contain at least 10.5% chromium content for durability and corrosion resistance
- The stainless steel sheets for must pass tests specified by ASTM that check for tensile strength, corrosion resistance, appearance, and texture/pattern approval
ASTM Standards:
A947M-16 Standard Specification for Textured Stainless Steel Sheet
A240M Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications