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All Categories > Aluminum and Stainless Bars, Tubes, Pipes and Plates > Stainless Steel > Cold Finished Stainless Steel > 302 - Cold Finished Stainless Steel > Types 302 Annealed and Cold Finished Stainless Steel - Rounds > Size 15/16  
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Size 15/16, Types 302 Annealed and Cold Finished Stainless Steel - Rounds



Type 302 is the basic "18-8" chromium-nickel stainless steel. It combines excellent mechanical properties with remarkable resistance to many corrosive agents encountered in domestic and industrial use. It is non-magnetic in the annealed condition and not hardenable by heat treatment. Both hardness and tensile strength can be increased by cold working. This is an electric-furnace product manufactured to meet the exacting standards of the aircraft industry.

UNS S30200. S30400, S30403

Physical Condition A

Stock Lengths 10' to 12' and 20' to 22'





Specifications  · Analysis  · Specifications  · Applications  · Corrosion Resistance  · Resistance to Scaling  · Mechanical Properties  · Machinability  · Weldability  · Forming  · Forging  · Annealing

Specifications

Estimated Weight per Foot

2.349 lb

Estimated Weight 12-Ft. Bar

28.19 lb


Analysis
302
Carbon .12 Max.
Manganese 2.00 Max.
Phosphorus .040 Max.
Sulphur .030 Max.
Si. 1.00 Max.
Cr.17.00/19.00
Ni. 8.00/10.00
Cu. .75 Max.
Mo. .75 Max.




Specifications
The following specifications are generally applicable:
Sheets & Plates: MIL-S-5059, AMS 5513, ASTM A 167, ASTM A 240
Bars: MIL-S-7720, QQ-S-763, AMS 5639, ASTM A 276, ASTM A 479



Applications
Used where corrosion resistance and good mechanical properties are primary requirements. These grades are widely accepted in such industries as dairy, beverage, and other food products where the highest degree of sanitation and cleanliness is of prime importance. Parts for handling acetic, nitric, and citric acids, organic and inorganic chemicals, dyestuffs, crude and refined oils, etc., are fabricated from this material. Because of its lack of magnetism it is highly desirable for instruments. It is also widely used for architectural trim. Type 302 sheets are used in aircraft applications where corrosion resistance is required, but where gas or arc welding and elevated temperatures are not involved. Type 304, as noted above, finds particular use in applications requiring welding.



Corrosion Resistance
Types 302 and 304 show good resistance to corrosion. They are highly resistant to strong oxidizing acids, such as nitric acid, and resist attack by a wide variety of organic and inorganic chemicals. Maximum corrosion resistance is obtained in the annealed condition. Intergranular corrosion may occur when material is heated within or cooled through the range of 800° to 1500°F.



Resistance to Scaling
Excellent scale resistance at temperatures up to 1600°F in continuous service. Chromium-nickel grades have a high coefficient of expansion, which should be considered in designing.



Mechanical Properties
Applicable specifications require the following properties of sheets in the annealed condition:
302
Tensile Strength - 75.000/110.00 psi
Elongation in 2"( 0.15" Thick and Under) - 40% Min.
Elongation in 2"( 0.16" Thick to .030") - 45% Min.
Elongation in 2"( 0.031" Thick and Over) - 50% Min.
In practice, annealed sheets and plates will average as follows:
Tensile Strength - 90.00 psi
Yield Strength - 40,000 psiMin.
Elongation in 2" - 50% Min.
Rockwell "B" Hardness 85.0




Machinability
Types 302 and 304 have a machinability rating of approximately 45% with 1212 rated as 100%. Surface cutting speed on automatic screw machines is approximately 75 feet per minute.



Weldability
Easily welded by all the commercial processes except forge or hammer welding. The resulting weld has good toughness and ductility. Annealing is recommended after welding to maintain maximum corrosion resistance.



Forming
These grades have very good drawing and stamping properties.



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



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




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