Audited Supplier
| Product Name | Seamless Duplex Stainless Steel Pipes /Tubes | |
| Company Inform | 1.Name:WENZHOU GUOHAO STEEL., LTD 2.Type: Manufacturer | |
| Material | DUPLEX SS 2507 UNS S32750 (F53 / 1.4410 / Alloy 32750 / Alloy 2507) | |
| Standard | ASTM A789,ASTM A790 | |
 | D (Outer diameter) | 6mm-630mm |
| T (Wall thickness) | 1mm-40mm | |
| L(Length) | Single random length/ Double random length or as customer's actual request | |
| Surface | Annealing&Pickling, Polishing (180#-600#), Bright Annealing, Sand Blasting,Shot Blasting | |
| Markings | Marked Pipe Sample: ASTM A790 UNS S32750 12" NB SCH 40S SEAMLESS HEAT NO. XXXX | |
| Flattening Test | For material heat treated in a continuous furnace flattening tests shall be made on a sufficient number of pipes to constitute 5% of the lot, but in no case less than 2 lengths of pipe. | |
| Hydrostatic or Nondestructive Testing | Each pipe shall be subjected to the nondestructive electric test or the hydrostatic test | |
| Delivery Time | 1.for ready stock :7 days after receiving the deposit of T/T 2.For MTO: 35 days after receiving the deposit of T/T | |
| Trade Terms | EXW,FOB, CFR, CIF etc. | |
| Loading Port | Ningbo/Wenzhou/Shanghai | |
| Remittance method | TT/LC/CASH | |
UNS S32750 Chemical Properties
| Grade | Ni | C | Cr | Mn | Si | P | Cu | S | Mo | N | |
| 2507 | Min | 6 | - | 24 | - | - | - | - | - | - | 0.24 |
| Max | 8 | 0.03 | 26 | 1.2 | 0.8 | 0.035 | 0.5 | 0.02 | 1.2 | 0.32 |
| Grade | Density | Tensile Strength min | Yield Strength min | Elongationin 2 in or 50mm,min | Hardness,max | Heat Treatment Temperature | ||
| ksi[MPa] | ksi[Mpa] | % | Brinell | HRC | ºF | ºC | ||
| S32750 /2507 | 7.8g/cm3 | 116[800] | 80[550] | 15 | 300 | 32 | 1880-2060 | 1025-1125 |
ASTM A789 DSS UNS S32750 Seamless Pipes Dimensional Tolerance
| ASTM A789 ASME SA789 PERMISSIBLE VARIATIONS IN DIMENSIONS | ||||||
| Group | Size,Outside Diameter,in.[mm] | Permissible Variations in Outside Diameter,in.[mm] | Permissible Variations in Wall Thinckness | Permissible Variations in Cut Length,in[mm] | Thin Walled Tubes | |
| Over | Under | |||||
| 1 | up to 1/2[12.7],excel | ±0.005[0.13] | ±15% | 1/8"[3] | 0 | ... |
| 2 | 1/2" to 1-1/2"[12.7 to 38.1],excl | ±0.005[0.13] | ±10% | 1/8"[3] | 0 | less than 0.065 in.[1.6mm] nominal |
| 3 | 1-1/2" to 3-1/2"[38.1 to 88.9],excl | ±0.010[0.25] | ±10% | 3/16"[5] | 0 | less than 0.095 in.[2.4mm] nominal |
| 4 | 3-1/2" to 5-1/2"[88.9 to 139.7],excl | ±0.015[0.38] | ±10% | 3/16"[5] | 0 | less than 0.150 in.[3.8mm] nominal |
| 5 | 5-1/2" to 8"[139.7 to 203.2],incl | ±0.030[0.76] | ±10% | 3/16"[5] | 0 | less than 0.150 in.[3.8mm] nominal |
- All of our stainless steel seamless pipe & tubes are packaged as per international standard to prevent any possible damage or loss. By default, we will use thick woven plastic bag to bundle the finished pipes together in batches.
- For some special pipes & tubes that are vulnerable to dirt, scratches, stress or rough handling, we will suggest wooden case for protection. Kindly note, wooden case can incur extra cost, not only its own cost, but also the increased freight cost, which is especially true for air transportation.
- For enhanced customer experience, we also provide dedicated package as per your special requirements.
The inspection of our company and products is open to customers themselves or their designated third-party inspectors, such as SGS, BV, TUV, DNV, etc., who are well-known in the industry.
We provide Manufacturer TC (Test Certificate) in accordance to EN 10204/3.1B, Raw Materials Certificate, HT/DNT Test Report, Third Party Inspection Report.
• EN 10204/3.1B
• Raw Materials Certificate
• HT/NDT Test Report
• Third Party Inspection Report
Material Testing: We ensure that all our materials go through strict quality tests before dispatching them to our clients.
• Mechanical Testing
• Hardness Test
• Chemical Analysis - Spectro Analysis
• Positive Material Identification - PMI Testing
• Flattening Test
• Flaring Test
• Intergranular Corrosion (IGC) Test
- 1. General service
- 2. Curatorial Industry
- 3. Food Industry
- 4. Ornamental
- 5. Aerospace Industry
- 6. Petrochemical
- 7. Fluid transport
- 8. Nuclear Industry
- 9. Boiler heat- exchanger
- 10. Oil and gas service
Guohao Steel adhere to the high standards of integrity and compliance required, including:
- Environmental standards
- Health and safety standards
- Ethical trading standards
- Export compliance requirements
In order to achieve our goals, we are improving our facilities and expanding our machinery to offer broader processing capabilities. Additionally, our investment extends to the growth and development of our teams, which represent our most valuable resource. We aim for our customers to receive the best experience and trust in the expertise, knowledge, and experience of our teams. As we continue looking towards the future, we rely on our core values to guide both decisions and actions.
- More than 16 Years of Experience in Stainless Steel Production.
- Provides cost-effective products and professional services to you.
- We offer an extensive range of stainless steel, super duplex steel,nickel alloy.
1.Q: Do you provide customized product services?
A: Of course, we can design and produce the products you need based on your specifications and drawings. For example: special dimensions, special controls, OEM, etc.
2.Q: Are you a manufacturer or trader?
A: We are manufacturers. We have our own factory to produce and process various kinds of stainless steel /nickel alloy pipes.
3.Q: Can we get the some samples?Is there a charge?
A: Yes, we will provide you with the samples you want. The samples are free of charge, but the customer may have to pay the freight.
4.Q: Can we visit your factory?
A: Of course, we welcome you to visit our factory on-site or visit our production line through online videos to learn more about our strength and quality. Once we have your schedule, we will arrange a professional sales team to follow up with you.
5.Q: How do you ensure the quality of the product?
A: All products must undergo three inspections throughout the entire manufacturing process, including production, cutting, and packaging. The factory inspection report is provided with the goods. If necessary, third-party inspections such as SGS can be accepted.
6.Q: What is your delivery time?
A: Different products and procurement quantities have different delivery times. The product will be delivered as soon as possible on the basis of quality assurance. Usually, if the goods are in stock, it takes 3-10 days. Alternatively, if the goods are out of stock, it will take 25 to 45 days.
7.Q: Can you arrange shipment?
A: Of course, we have freight forwarders who have been cooperating for many years. We are VIP and can provide you with the most favorable prices and professional services.
8.Q: What if I don't have import experience?
A: We have rich export experience. As long as you have an import license, please leave the rest to us! We will help you choose the most suitable transportation service to safely and accurately deliver the product to the place where it is needed.
