Stainless Steel Alloy 2304 is stocked by 13 North American distributors and produced by 12 large mills. Distributors will offer small quantity buys while mills will generally only sell large quantities, with delivery times anywhere from 10 to 50 weeks depending on size and form required
This material is stocked primarily in Flat Rolled Products by 8 distributors but is also available to a lesser extent in Piping Components, Tubular Products, and Wire Products.
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Specifications
The following specifications cover Stainless Steel Alloy 2304
- ASTM A240
- ASTM A276
- ASTM A480
- ASTM A789
- ASTM A790
- DIN 1.4362
- UNS S39320
Property Results
Related Metals:
- SAF 2304(tm)
- 2304(tm)
- Lean Duplex 2304
- Duplex Alloy 2304
Chemistry Data : [top]
Carbon
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0.03 max |
Chromium
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Iron
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Balance |
Manganese
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Nickel
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Nitrogen
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Phosphorus
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0.04 max |
Silicon
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Sulphur
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0.04 max |
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Principal Design Features
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This alloy is a duplex stainless steel whose structure is a balance of ferritic and austenitic. It was designed to feature high strength and toughness, resistance to stress corrosion cracking, low thermal expansion, high thermal conductivity and easy fabrication. This alloy is not designed for applications which expose it to temperatures over 570 F for long periods.
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Applications
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Heat exchangers, feedwater tubes, piping and instrumentation tubing for general service. Industries utilizing this alloy include the coal handling, food and beverage, potash, waste water and pulp and paper.
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Machinability
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Low speeds and constant feeds will minimize this alloy's tendency to work harden. Tougher than 304 and 316 stainless with a long stringy chip, the use of chip breakers is recommended.
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Forming
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Due its inherently higher yield strength, initial forming pressures must be higher than those required for standard 300 series stainless steel. Low ductility will make forming operations difficult.
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Welding
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All common methods including GTAW, SAW and GMAW can be successfully employed. Preheating and post weld annealing is not required. Filler metal should be a balanced ferrite/ austenite type like 2205 or 2304.
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Hot Working
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This is the recommended method of forming. It may commence after heating to 1750-2000 F, followed by rapid cooling after working. For maximum properties material should be fully annealed after working.
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Annealing
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Heat to 1710-1920 F(930-1050 c), rapid quench.
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Hardening
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This material is not hardenable by heat treatment.
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Physical Data : [top]
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Density (lb / cu. in.)
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0.28
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Specific Gravity
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7.8
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Specific Heat (Btu/lb/Deg F - [32-212 Deg F])
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0.11
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Modulus of Elasticity Tension
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29
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Mechanical Data : [top]
Form |
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Sheet |
Condition |
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Test Specimen Annealed |
Temper |
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70 |
Tensile Strength |
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90 |
Yield Strength |
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60 |
Elongation |
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25 |
Sharpy |
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74 |
Rockwell |
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C20 |
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Form |
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Sheet |
Condition |
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Test Specimen Annealed |
Temper |
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122 |
Tensile Strength |
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87 |
Yield Strength |
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51 |
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Form |
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Sheet |
Condition |
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Test Specimen Annealed |
Temper |
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212 |
Tensile Strength |
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82 |
Yield Strength |
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47 |
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Form |
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Sheet |
Condition |
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Test Specimen Annealed |
Temper |
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392 |
Tensile Strength |
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75 |
Yield Strength |
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43 |
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Form |
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Sheet |
Condition |
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Test Specimen Annealed |
Temper |
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572 |
Tensile Strength |
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72 |
Yield Strength |
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40 |
Videos :
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MSO currently has no videos available for this grade.
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