Type 302 Stainless Steel

Inquiries : 0 - 2013/9/29 16:32:59

Elements (Max.)

C Mn

.15 2.00 .045 .030 .75 17/19 8/10

Type 302 is the original general purpose austenitic chromium nickel stainless steel. Its corrosion resistance is somewhat

superior to that of Type 301. It is used largely in the annealed condition. It can be cold worked to high tensile strengths

but with slightly lower ductility than Type 301. Type 302 is essentially non-magnetic when annealed, and becomes

slightly magnetic when cold worked.

Applications

: Because of its excellent corrosion resistance and good fabricating and mechanical properties, Type 302

Stainless Steel finds application in architecture, food processing and serving, appliances, hospital and institution

equipment, and in chemical processing. It is also used in consumer products such as electric skillets, sinks, dishwashers,

cooking utensils, and sporting equipment.

Corrosion Resistance

: Type 302 Stainless Steel has excellent corrosion resistance to a large number of corrosive media.

Its corrosion resistance is superior to that of Type 301.

Elements (Max.)

C Mn

.15 2.00 .045 .030 .75 17/19 8/10

Type 302 is the original general purpose austenitic chromium nickel stainless steel. Its corrosion resistance is somewhat

superior to that of Type 301. It is used largely in the annealed condition. It can be cold worked to high tensile strengths

but with slightly lower ductility than Type 301. Type 302 is essentially non-magnetic when annealed, and becomes

slightly magnetic when cold worked.

Applications

: Because of its excellent corrosion resistance and good fabricating and mechanical properties, Type 302

Stainless Steel finds application in architecture, food processing and serving, appliances, hospital and institution

equipment, and in chemical processing. It is also used in consumer products such as electric skillets, sinks, dishwashers,

cooking utensils, and sporting equipment.

Corrosion Resistance

: Type 302 Stainless Steel has excellent corrosion resistance to a large number of corrosive media.

Its corrosion resistance is superior to that of Type 301.

Elements (Max.) C Mn P S Si Cr Ni .15 2.00 .020 .15 1.00 17/19 8/10

Type 303 is a chromium-nickel stainless steel modified by the addition of selenium or sulphur, as well as phosphorous, to improve machinability and non-seizing properties. It is the most readily machinable of all the chormium-nickel grades and has good corrosion resistance. It is non-magnetic in the annealed condition and non-hardenable by heat treatment. Tensile strength can be increeased by cold working.

Applications: Used almost exclusively for parts requiring machining, grinding or polishing where good corrosion resistance is also required. Its non-seizing and non-galling properties make it ideal for moving parts. Being an austenitic steel, it is useful where low magnetic permability is desired.

Corrosion Resistance: Because of the elements which are added to improve machinability, Type 303 has slightly less general corrosion resistance than the regular chromium-nickel grades such as Type 302. Maximum corrosion resistance is obtained in the annealed condition.

Resistance To Scaling: This grade has excellent scale resistance at temperatures up to 16O0 Deg. F in continuous service. Like other chromium-nickel grades, it has a high coefficient of expansion which should be considered in designing.

Machinability: Type 303 has considerably better machining characteristics than the other chromium-nickel grades. It has a machinability rating of approximately 60% with B-1112 rated 100%. Surface cutting speed on automatic screw machines is approximately 100 feet per minute. Various producers are continually modifying the basic alloy to improve the machinability of Stainless Steel in general. 303 is still the basic grade, however.

Forming:This grade has fairly good forming properties.

Forging:Forge between 2100 and 2350 Deg. F Do not forge below 1700 Deg. F

Annealing:Annealing range is between 1850 and 2050 Deg. F Cool rapidly. Water should be used for heavier sections, air for lighter sections. The stress relieving range is between 400 and 750 Deg. F