304

Bar, Angle, Tubing and Forgings

Typical Analysis:

% Maximum unless shown as a range

 

C

Mn

P

S

Si

Cr

Ni

302

.15

2.00

.045

.030

1.00

17.00/19.00

8.00/10.00

304

.08

2.00

.040

.030

.65

18.00/20.00

8.00/10.50

Note: 304L has .03% max. carbon in all forms produced.

Mechanical Properties
Typical

Tensile Strength psi

Yield Strength psi

Elongation on 2″

Rockwell B Hardness

84,000

40,000

50%

84

Specifications

The following specifications are generally applicable:

    • Sheet and Plate: MIL-S-5059, AMS-5513, ASTM A 167, ASTM A 240, ASME SA-240

    • Bar: MILS-S-18170,QQ-S-763, AMS-5639, ASTM A 276, ASTM A 479, ASME SA-479

Applications

Washing machine tubs, sinks, strainers, food processing equipment, beer barrels, bulk milk coolers, wine storage tanks, store fronts, elevator doors and cabs, laboratory equipment and chemical containers, fume hoods, fire extinguisher parts, heat exchangers, are typical uses.

 

Corrosion Resistance

Types 302 and 304 show good resistance to corrosion. They are highly resistant to strong oxidizing acids, such as nitric acid. Intergranular corrosion may occur when material is heated within or cooled through the range of 425°-815°C (800D-1500°F).

 

Heat Resistance

Good oxidation resistance in intermittent service tol 600° and in continuous service to 1650DF. Continuous use in the 800 – 1575°F range not recommended but often performs well in temperatures fluctuating above and below this range. Type 304L is more resistant to carbide precipitation and can be used in the above temperature range.

 

Heat Treatment

Annealing – Heat to 1850CF – 2050CF, and cool rapidly. Use the low side of the range for intermediate annealing. This grade cannot be hardened by thermal treatment.

 

Machinability

Types 302 and 304 have a machinability rating of approximately 45%, with B 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.

316

Bar

General Characteristics

Type 316 is modified by the addition of molybdenum, which greatly increases its corrosion resistance as well as its mechanical properties at elevated temperatures. Plates are available not only in the regular Type 316 analysis, but also in a low carbon analysis known as Type 316L which precludes any harmful precipitation in the 425°-815°C (800°-1500°F)range.

Typical Analysis: % Maximum unless shown as a range

C

Mn

P

S

Si

Cr

Ni

Ni

.08

2.00

.045

.030

.75

16.00/18.00

10.00/14.00

2.00/3.00

Note: 316L has .03% max. carbon in alt forms produced.

Mechanical Properties

Tensile Strength psi

Yield Strength psi

Elongation on 2″

Rockwell B Hardness

84000

45,000

50% min.

80

 

Specifications

The following specifications are generally applicable:

  • Sheet and Plate: MIUS-5059, ASTM A 167, ASTM A 240, ASME SA-240

  • Bar: MILS-S-7720, AMS-5648, QQ-S-763, ASTM A 276, ASME SA-479

 

Applications

Pulp and paper equipment, heat exchangers, dyeing equipment, photographic developing equipment, propeller shafts, fittings, exterior architectural components in marine coastal areas, are typical uses.

 

Corrosion Resistance

Highly resistant to the complex sulphur compounds used in pulp and paper processing. Also resists attack by marine and corrosive industrial atmospheres.

 

Heat Resistance

Good oxidation resistance in intermittent service tol 600° and in continuous service to 1700°F. Continuous use in tha 800 – 1 575°? range not recommended but often performs well in temperatures fluctuating above and bslow this range. Type 316L is more resistant to carbide precipitation and can be used in the above temperature range.

 

Heat Treatment

Annealing – Heat to 1850°F – 2050°F, and cool rapidly for maximum corrosion resistance. 316 grades cannot be hardened by thermal treatment.

 

Machlnabilily

Type 316 has a machinability rating of approximately 36%, with B 1212 rated 100%. Surface cutting speed on automatic screw machines is approximately 60 feet per minute.

 

Weldability

Easily welded by all the commercial processes except for forge or hammer welding.



Commodity Values of Nickel