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STAINLESS STEEL 302 - ALLOY COMPOSITION

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Stainless Steel 302

Related Metals:

12R10(tm)                                    

Specifications:

AISI 302
AMS 5515
AMS 5516
AMS 5788
ASTM A167
ASTM A240
ASTM A276
ASTM A313
ASTM A314
ASTM A368
ASTM A473
ASTM A478
ASTM A479
ASTM A492
ASTM A493
ASTM A511
ASTM A554
ASTM A580
ASTM A666
DIN 1.4319
MIL S-7720
QQ S763
QQ S766
UNS S30200

Chemistry Data

Carbon

0.15 max

Chromium

17 - 19

Iron

Balance

Manganese

2 max

Nickel

8 - 10

Phosphorus

0.045 max

Silicon

1 max

Sulphur

0.03 max

General Information

Principal Design Features

Type 302 is a slightly higher carbon version of type 304, most commonly found in strip and wire forms. While still used in a variety of industries, many applications have shifted to 304 and 304L due to advances in melting technology, availability and cost


Applications

Primarily used in the stamping, spinning and wire forming industry. This alloy is formed into all types of washers, springs, screens and cables.


Machinability

Slow speeds and high feeds will overcome this alloys tendency to work harden. Due to gummy chips, it is recommended that chip breakers are used on all tooling.


Corrosion Resistance

This alloy is resistant to a wide variety of organic and inorganic compounds, mild nitric and sulfuric acids, fresh water and many mild household and industrial chemicals.


Welding

This alloy can best be welded by resistance or shielded fusion methods. Filler metals should be AWS E/ER308 or 312. Post weld annealing dissolves the chromium carbide and is recommended for maximum resistance to intergranular attack.


Forging

Commence forging at 2100-2300 F(1149-1260 C). Do not forge below 1700 F(927 C).


Hot Working

Uniform heating to 2100 F(1149 C) will allow this allow to be forged, upset and headed successfully. Do not work 302 below 1700 F (927 C). Forgings should be fully annealed after all operations to reattain maximum corrosion resistance.


Cold Working

Cold working will dramatically increase the hardness of this material, however it is quite ductile and may readily be drawn, spun and upset. Any cold work will cause this alloy to become magnetic. Post-fabrication annealing is necessary to reattain maxim


Annealing

1850-2050 F (1010-1121 C) with cooling at a rapid rate to avoid the precipitation of chromium carbides.


Hardening

This alloy does not respond to heat treatment.


Physical Data

Density (lb / cu. in.)

0.287

Specific Gravity

7.94

Specific Heat (Btu/lb/Deg F - [32-212 Deg F])

0.12

Electrical Resistivity (microhm-cm (at 68 Deg F))

432

Melting Point (Deg F)

2590

Modulus of Elasticity Tension

28

Mechanical Data

MSO currently has no data available for this grade.

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