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Payment Type: L/C,T/T,D/P,Western Union
Transportation: Ocean,Land,Air
Model No.: Duplex Tube
Brand: YUHONG
Type: Seamless
Certification: BSI
Application: Gas Pipe
Section Shape: Round
Usage: Thermal Equipment
Technique: Cold Drawn
Material: Stainless Steel
ASTM A789/A789M / ASME SA789/SA789M UNS S32304 2304 Super Duplex Stainless Steel Seamless Tube for Superheater Application
Generally, the regular sizes we export as below
O.D: 1/2" = 12.7mm, 5/8" = 15.88mm. 3/4" = 19.05mm, 1" = 25.4mm, 1-1/4" = 31.75mm, 1-1/2" = 38.1mm
W.T: BWG22 = 0.71mm, BWG20 = 0.89mm, BWG18 = 1.24mm, BWG16 = 1.65mm, BWG14 = 2.11mm, BWG12 = 2.77mm, BWG10 = 3.4mm,
(Average wall thickness and Minimum wall thickness)
The regular standard is ASTM A789/ASME SA789, this specification covers grades of average wall thicknes, or if customer need minimum wall thickness, it should be specified on the order before order confirmed.
Chemical Composition
The chemical composition of stainless steel grade Duplex 2304 / UNS S32304 is outlined in the following table.
Element | Content (%) |
Iron, Fe | 72.679 |
Chromium, Cr | 23 |
Nickel, Ni | 4 |
Molybdenum, Mo | 0.20 |
Nitrogen, N | 0.1 |
Carbon, C | 0.02 |
Sulfur, S | 0.001 |
Mechanical Properties
The mechanical properties of stainless steel grade Duplex 2304 / UNS S32304 are displayed in the following table.
Properties | Metric | Imperial |
Tensile strength | ≥ 600 MPa | ≥ 87000 psi |
Yield strength (@strain 0.200 %) | ≥ 400 MPa | ≥ 58000 psi |
Modulus of elasticity | 200 GPa | 29000 ksi |
Shear modulus (@temperature 20°C/ 68°F) | 75.0 GPa | 10900 ksi |
Poisson’s ratio | 0.333 | 0.333 |
Elongation at break | ≥ 25 % | ≥ 25 % |
Hardness, Rockwell C | ≤ 20.0 | ≤ 20.0 |
Hardness, Brinell | 180 - 230 | 180 - 230 |
Applications
Stainless steel grade Duplex 2304 / UNS S32304 is widely used in various kinds of industries including pulp and paper, coal handling, potash, food and beverage, and waste water.
The specific applications are as follows:
1.Bridges
2.Storage tanks
3.Water heaters
4.Heat exchangers
5.Pressure vessels
6.Feed water tubes
7.Heat exchangers
8.Flue-gas cleaning
9.Seawater systems
10.Desalination plants
11.Parts for structural design
12.Rotors, impellers and shafts
13.Firewalls and blast walls on offshore platforms
14.Cargo tanks and pipe systems in chemical tankers
15.Piping and instrumentation tubing for general service
Standard : ASTM/ASME A/SA789, A/SA790, A/SA928, DIN17456/17458, EN10216-5.
We supply tubes according to the customers' requirement.
Material Grade : UNS S31803, S32205, S32101, S32304, S32750, S32760, 1.4462, 1.4410 etc...
Size Range:
ASTM A789/A789M: OD: Φ12.7mm-Φ203mm; WT:0.5mm-6.35mm | |
ASTM A790/A790M: OD: Φ6mm-Φ325mm; WT:0.5mm-30mm | |
ASTM A789/A789M: OD: Φ12.7mm-Φ203mm; WT:0.5mm-4.0mm | |
ASTM A790/A790M: OD: Φ10mm-Φ2000mm; WT:0.5mm-40mm (OD≤630mm for single seam; OD>Φ630mm For circumferential seam) | |
ASTM A928/A928M: OD: Φ10mm-Φ406mm; WT:0.5mm-10mm |
Mechanical Property:
UNS | Tensile Strength Min, Mpa | Yield Strength Min, Mpa | Elongation in 2 in Or 50mm Min, % | Hardness Max, HRC |
S31803 | 620 | 450 | 25 | 30 |
S32205 | 655 | 485 | 25 | 30 |
S32101 | 700 | 530 | 30 | 30 |
S32304 | 690 | 450 | 25 | 30 |
S32750 | 800 | 550 | 15 | 32 |
S32760 | 750 | 550 | 25 | 32 |
Some of the quality tests carried out by us includes:
Corrosion Test | Conducted only when specially requested by the client |
Chemical Analysis | Test done as per required quality standards |
Destructive / Mechanical Testing | Tensile | Hardness | Flattening | Flare | Flange |
Reverse-bend and Re. flat tests | Carried out in full compliance with relevant standards & ASTM A-450 and A-530 norms, which ensures trouble-free expansion, welding & use at customers end |
Eddy Current Testing | Done to detect homogeneities in subsurface by using Digital Flaw-mark Testing System |
Hydrostatic Testing | 100% Hydrostatic Testing carried out according to ASTM-A 450 norms for checking tube leakage, and biggest pressure we can support 20Mpa/7s . |
Air Under Pressure Test | To check any evidence of air leakage |
Visual Inspection | After passivation, every single length of tubes & pipes is subjected to thorough visual inspection by trained staff for detecting surface flaws & other imperfections |
Detailed Production Process
Seamless Pipe Production Flow Chart: Stainless Steel Bar-> Inspection-> Peeling-> Cut-Center-> Heating-> Piercing-> Inspection/Polishing-> Pickling - Cold Rolling/Drawing-> Pickling-> Solution Annealing-> Straightening-> Cutting-> Bright&Annealing/Pickling Passivating-> Composition Inspect-> Marking-> Packing-> Storing-> Shiping.
YUHONG GROUP deal with Austenitic Stainless Steel, Nickel Alloy Steel (Hastelloy , Monel, Inconel, Incoloy) seamless and welded pipe and tube already more than 25 years, every year sell more than 80000 tons of steel pipe and tube. Our client already cover more than 45 countries, Like Italy, UK, Gernmany, USA, Canada, Chile, Colombia, Saudi Arabia, Russia, Korea, Singapore, Austrial, Poland, France , ....And our group branch company and factory have been already approved by : ABS, DNV, GL, BV, PED 97/23/EC, AD2000-WO, GOST9941-81, CCS, TS, CNNC, ISO9001-2008, ISO 14001-2004.
If you have any inquires, please freely contact me.
Email: luis.bao@ steelseamlesstube.com
Package Type | : | Plywood Case /Iron Case/ In Bundles Packing |
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Packaging: Plywood Case /Iron Case/ In Bundles Packing
Transportation: Ocean,Land,Air
Place of Origin: China
Supply Ability: 800 Ton / Month
Certificate: ABS, GL, DNV, NK, PED, AD2000, GOST 9941
Payment Type: L/C,T/T,D/P,Western Union
Incoterm: FOB,CFR,CIF,EXW,FCA
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Privacy statement: Your privacy is very important to Us. Our company promises not to disclose your personal information to any external company with out your explicit permission.