0.4mm thick 304 stainless steel strip
Type 304 is a titanium stabilized chromium nickel austenitic stainless steel with corrosion resistance similar to 304/304L.
This grade is typically used in the 800-1500˚F temperature range where it is stabilized against chromium carbide precipitation by the addition of titanium, which results in the precipitation of titanium carbides.
Type 304 has excellent intergranular corrosion resistance after exposure to this temperature range, and this grade resists oxidation up to 1500˚F and has higher creep and stress rupture properties than 304/304L. It also possesses good low temperature toughness and is non-magnetic in the annealed condition.
Chemical Composition：
Carbon: 0.08 max
Manganese: 2.00 max
Phosphorus: 0.040 max
Sulfur: 0.030 max
Silicon: 1.00 max
Chromium: 18.00- 20.00
Nickel: 8.00- 10.00
Copper: 0.75 max
Molybdenum: 0.75 max
APPLICATIONS：
Aircraft collector rings, exhaust stacks, carburetor air intensifier tubes, exhaust manifolds, flexible couplings, jet engine parts, mufflers, pressure vessels, tubing, fasteners, flexible metal hose and bellows
COLD FORMING：
Type 304 can be readily formed and drawn. Like most other austenitic stainless steels, type 304 work hardens and may require annealing after severe forming.
HEAT TREATMENT：
Type 304 is non hardenable by heat treatment and can only be hardened by cold working.
The annealing temperature range for Type 304 is 1800 to 2000° F (928 to 1093° C). While the primary purpose of annealing is to obtain softness and high ductility, this steel may also be stress relief annealed within the carbide precipitation range 800 to 1500° F (427 to 816° C), without any danger of subsequent intergranular corrosion.
Relieving strains be annealing for only a few hours in the 800 to 1500°F (427 to 816° C) range will not cause any noticeable lowering in the general corrosion resistance, although prolonged heating within this range does tend to lower the general corrosion resistance to some extent. As emphasized, however, annealing in the 800 to 1500° F (427 to 816° C) temperature range does not result in a susceptibility to intergranular attack.
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