| 标准： | ASTM，AISI， DIN， EN， GB， JIS | 材料等级： | S31803 |
|---|---|---|---|
| 尺寸 | 1/2′ – 48′ | BGW： | BGBW 10 -BGBW XXS |
| 申请： | Petroleum， Chemical， Machinery， Electric Power， Shipbuilding， Papermaking， Construction， Etc. | 长度 | 定制 |
| 技术： | Cold Rolled， Hot Rolled， Cold Drawn | 类型 | Seamless Weld Tube |
| 强光 | Petroleum Duplex Stainless Steel Tube， S31803 Duplex Stainless Steel Weld Tube， ASTM 789 Duplex Stainless Steel Tube | ||
ASTM A789 S31803 DUPLEX Stainless Steel Tube
ASTM A789 S31803 is a specification for seamless and welded duplex stainless steel tubes. Duplex stainless steel refers to a type of stainless steel that contains a combination of both austenitic and ferritic stainless steels. This combination provides enhanced mechanical properties and corrosion resistance compared to traditional stainless steels.
The S31803 grade specifically refers to a duplex stainless steel alloy that contains approximately 22% chromium， 5% nickel， 3% molybdenum， and small amounts of other elements such as nitrogen and manganese.
ASTM A789 is the standard specification for seamless and welded duplex stainless steel tubes for general corrosion-resisting and low or high-temperature service. This specification covers tubes in sizes ranging from 1/8" to 5" in outside diameter， with wall thicknesses from 0.015" to 0.500".
Duplex steel tubes made to the ASTM A789 S31803 specification are commonly used in various industries such as oil and gas， chemical processing， pulp and paper， and desalination plants. They are known for their high strength， excellent corrosion resistance， and good weldability.
It is important to note that ASTM A789 S31803 tubes should be used in accordance with the specific requirements and conditions of the application， and proper testing and inspection should be conducted to ensure their suitability for the intended use.
化学成分:
| 等级 | C | 锰 | Si | P | S | Cr | 莫 | 倪 | |
| UNS S31803 | 最小值 最大值 | -0.03 | -2 | -1 | -0.03 | -0.02 | 21.0 – 23.0 | 2.5 – 3.5 | 4.5 – 6.5 |
S31803 DUPLEX Stainless Steel Tube Mechanical Behaviour:
| UNS 名称 | 拉伸强度， 最小，Mpa | 屈服强度， min Mpa | 伸长率为 2 英寸， 或 50 毫米，最小，1 TP3T | 硬度，最大 | |
| HBW | HRC | ||||
| S31803 | 620 | 450 | 25 | 290 | 30 |
申请：
1.石油和天然气工业
2. Chemical processing
3.海水淡化厂
4. Heat exchangers
5. Pulp and paper industry
6. Power generation
7. Food processing industry
