Alloy 2304 is a duplex stainless steel composed of 23% chromium and 4% nickel.
2304 Stainless steel Bars Price in China ,Manufacturer of 2304 Stainless Steel Bars
The corrosion resistance of 2304 alloy is similar to that of 316L.
In addition, its mechanical properties, namely yield strength, are twice that of the 304L/316L austenite grade.
This feature allows designers to reduce the weight of products, especially pressure vessels, when designing products.
This alloy is particularly suited to the temperature range of -50°C /+300°C (-58°F/572°F).
It can also be used at lower temperatures under strict restrictions (especially for welded structures).
Compared with 304 and 316 austenite, 2304 alloy has stronger stress corrosion resistance due to its dual phase microstructure, lower nickel content and higher chromium content.
Duplex Stainless Steel (DSS for short) refers to stainless steel with about 50% of ferrite and 50% of austenite, and generally less than 30% of the content of the less phase. In the case of low C content, the Cr content is 18%~28%, and the Ni content is 3%~10%. Some steels also contain alloying elements such as Mo, Cu, Nb, Ti, and N. Since its birth in the United States in the 1940s, duplex stainless steel has developed into the third generation. Its main feature is that the yield strength can reach 400-550MPa, which is twice that of ordinary stainless steel, so it can save materials and reduce equipment manufacturing costs. In terms of anti-corrosion, especially under the conditions of harsh medium environment (such as seawater, high chloride ion content), the anti-pitting corrosion, crevice corrosion, stress corrosion and corrosion fatigue properties of duplex stainless steel are obviously better than ordinary austenite Stainless steel, comparable to high alloyed austenitic stainless steels.
2304 stainless steel applications in the oil and gas industry;
Offshore shitaitian oil platform (heat exchanger pipe, water treatment and water supply system, fire protection system, sprinkler system, water stabilization system;
Petrochemical equipment;
Desalination (desalination) equipment (and the high-pressure pipe and seawater pipe in the equipment);
Mechanical and structural components requiring both high strength and high corrosion resistance;
Burning (waste) gas purification equipment.
Main ingredients: 25Cr-7Ni-4Mo-0.27N
Equivalent Grades
| Grade |
Euronorm |
China GB |
ASTM/ASME |
| No. |
| 2304 |
1.4362 |
00Cr23Ni4 |
A240 - UNS S32304 |
Standard Specification
| Types of stainless steel pipes |
round pipe,squard pipe ,rectangular pipe,oval tube,and pipe in roll. |
| pipe thickness |
0.2-200mm |
| out diameter |
3mm，6mm,10mm,12mm,60mm,80mm,102mm,180mm,245mm,530mm,630mm etc. |
| type of the pipe |
weld pipe and sealess pipe. |
| length |
1000mm,3000mm,5800mm,6000mm,12000mm ,and any length you want,etc. |
| surface |
Hot rolled (HR), Cold rolled Tube (CR), 2B, 2D, BA NO(8), SATIN (Met with Plastic Coated) |
Composition content
| Grade |
C |
Mn |
Si |
P |
S |
Cr |
Mo |
Ni |
N |
| 2304 |
Min.
Max. |
≤0.02 |
≤2.50 |
≤0.80 |
≤0.035 |
≤0.001 |
21.5~24.5 |
0.05~0.6 |
3.0~5.5 |
0.05~0.2 |
Alloy and state :926,
Tensile strength (Rm N/mm2):490
Yield strength (RP0.2N/mm2):216,
Elongation A5% :35.
Density: 8.24 g/cm3
Characteristic machining technology
1D -- The surface has discontinuous granular shape, also known as fog surface.
Processing technology: hot rolling + annealing shot peening pickling + cold rolling + annealing pickling.
2D - A slightly silvery white colour.
Processing technology: hot rolling + annealing shot peening pickling + cold rolling + annealing pickling.
2B -- Silver white with better gloss and flatness than a 2D surface.
Processing technology: hot rolling + annealing shot peening pickling + cold rolling + annealing pickling + quenching and tempering rolling.
Ba - Excellent surface gloss, high reflectivity, like a mirror surface.
Processing technology: hot rolling + annealing shot peening pickling + cold rolling + annealing pickling + surface polishing + quenching and tempering rolling.
No.3 -- Good gloss, coarse grain surface.
Processing technology: polishing and tempering rolling for 2D or 2B with 100~120 abrasive materials (JIS R6002).
No.4 -- Good gloss, fine lines on the surface.
Processing process: polishing and tempering rolling for 2D or 2B with 150~180 abrasive materials (JIS R6002).
HL -- Silver grey with hair streaks.
Processing technology: 2D products or 2B products with appropriate granularity of abrasive materials for polishing the surface is a continuous abrasive grain.
MIRRO -- Specular.
Processing technology: 2D products or 2B products with appropriate granularity of the grinding material grinding and polishing to the mirror effect.
Price List
| Stainless Steel 2304 pipe Price List |
FOB Shanghai Per Unit (USD) |
| 2304 stainless steel Round pipe |
$6000.00-$6300.00 |
| 2304 mirror/no.4 Stainless Steel pipe |
$6325.00-$6500.00 |
| 2304 Stainless Steel Square pipe |
$6250.00-$6450.00 |
| 2304 seamless pipe |
$6000.00-$6300.00 |
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