S. S. 330

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UNS - N08330

330 stainless steels offer a wide variety of high level of corrosion resistance, particularly to carburization, oxidation and nitridation.

In aqueous situations, the alloy's chromium content gives resistance to oxidizing conditions while its nickel content imparts resistance to reducing conditions. The high nickel also gives 330 good resistances to chloride-ion stress- corrosion cracking.

Characteristics
  • Oxidation resistance to 2100°F
  • Resistant to carburization and nitriding
  • Resistant to thermal shock
  • Good strength at elevated temperature
  • Chloride ion stress corrosion cracking resistance

Applications
  • Furnace containers-carburizing, carbonitriding, annealing malleablizing
  • Muffles, retorts
  • Bar frame heat treating baskets
  • Quenching fixtures
  • Radiant tubes
  • Salt pots
  • Furnace fans and shafts
  • Conveyors
  • Tube hangers for crude oil heaters adn steam boilers
  • Heat exchangers
  • Flares


Corrosion Resistance

330 stainless steels offer a wide variety of high level of corrosion resistance, particularly to carburization, oxidation and nitridation. In aqueous situations, the alloy's chromium content gives resistance to oxidizing conditions while its nickel content imparts resistance to reducing conditions. The high nickel also gives 330 good resistances to chloride-ion stress- corrosion cracking.

Fabrication

Stainless Steel 330 is promptly fabricated by a standard commercial process. In comparison to carbon steel, stainless steels are tougher and tend to work harden quickly. Alloy 330's rate of work hardening is similar to austenitic stainless steels.

Machining

This alloy can be satisfactorily machined with proper practices. Slow speeds, sulphurized lubricants, positive feeds and rigid mounts are generally recommended.

Welding

Can be effectively welded using GAW methods. Use either 330 or Inco 800 filler materials.

Hot Working

Any hot work should begin at 2100-2150 F and finish at 1800 F.

Cold Working

330 are more difficult to cold form than standard 18-8 stainless steels because of its relatively high strength and work hardening rate. Suppose to utilize higher forces than normal and note its' high spring back.

Annealing

Soak at 2050-2200 F, air quench.

Hardening

330 will just harden upon cold reduction and this will not respond to heat treatment.

Chemical Composition %

CSiPS CrMnNiFe
0.08 max0.75 - 1.500.03 max 0.03 max17.0 - 20.02.0 max34.0 - 37.0 Remainder

Mechanical Properties

Tensile Strength (ksi)0.2% Yield Strength (ksi)Elongation% in 2 inches
703030

Physical Properties

UnitsTemperature in °C
Density8.0 g/cm³Room
Specific Heat0.12 Kcal/kg.C22°
Melting Range1400 - 1425 °C-
Modulus of Elasticity 197 KN/mm²20°
Electrical Resistivity101.7 µΩ.cmRoom
Coefficient of Expansion14.4 µm/m °C20 - 100°
Thermal Conductivity12.5 W/m -°K24°

ASTM Specifications

Pipe / Tube Sheet / PlateBar Forging / Forging Stock
B 535, B 710B 536B 511, B 512

Availability

Manufacturing
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Piping / Spools
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B/W Fittings
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Flanges
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Bars
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