| 标准： | ASTM A790 | 材料等级： | S31803 |
|---|---|---|---|
| 尺寸 | 1/2′ – 48′ | 时间安排 | sch 10 -sch xxs |
ASTM A790 S31803 DUPLEX Stainless Steel PIPE
ASTM A790 S31803 is a specification for duplex stainless steel pipe. Duplex stainless steel is a type of stainless steel that contains both austenite and ferrite phases in its microstructure， which gives it enhanced mechanical properties and corrosion resistance compared to traditional stainless steels.
The S31803 grade refers to the specific composition of the duplex stainless steel， which typically consists of around 22% chromium， 5-6% nickel， 3% molybdenum， and small amounts of other elements such as nitrogen and manganese.
ASTM A790 is the standard specification for seamless and welded duplex stainless steel pipe. It covers pipes of various sizes and wall thicknesses， and specifies the requirements for chemical composition， mechanical properties， and testing methods.
The S31803 duplex stainless steel pipe is commonly used in various industries such as oil and gas， chemical processing， and marine applications. It offers excellent resistance to corrosion， high strength， and good weldability.
Overall， ASTM A790 S31803 duplex stainless steel pipe is a reliable and versatile material that is suitable for a wide range of applications.
化学成分:
| 等级 | C | 锰 | Si | P | S | Cr | 莫 | 倪 | N | |
| 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 | 0.08 – 0.20 |
S31803 DUPLEX Stainless Steel PIPE Mechanical Behaviour:
| 机械性能 | 2205 双相钢 |
| 拉伸强度 | 最小 620 兆帕 |
| 屈服强度 | 最小 450 兆帕 |
| 伸长率 | 25% min |
| 布氏硬度 | 最大 293 HB |
| 洛氏硬度 | 31 HR C 最大值 |
申请：
1.石油和天然气工业：ASTM A790 S31803 具有很高的耐腐蚀性和强度，适用于石油和天然气的勘探、生产和提炼。它可用于海上平台、海底管道系统和输送腐蚀性流体的管道。
2.化学加工业：化学加工厂使用双相不锈钢管处理腐蚀性化学品和流体。双相不锈钢管耐点蚀、缝隙腐蚀和应力腐蚀开裂，因此适用于各种化学工艺。
3.海水淡化厂：ASTM A790 S31803 管道具有很强的抗氯化物腐蚀能力，适用于海水淡化厂。它们可用于海水进水和盐水排出系统，以及将海水加工成淡水。
4.发电：双相不锈钢管用于发电厂的各种应用，包括热交换器、冷凝器和冷却系统。双相不锈钢管具有出色的耐腐蚀和耐侵蚀性，这在发电环境中至关重要。
5.食品加工业：ASTM A790 S31803 管道用于食品加工业，用于处理腐蚀性食品和流体。它们耐有机酸（如醋酸和柠檬酸），易于清洁和维护。
6.结构应用：双相不锈钢管用于需要高强度和耐腐蚀性的结构应用领域。它们可用于建筑、桥梁和基础设施项目。
7.水和废水处理：ASTM A790 S31803 管道具有很强的耐腐蚀性，因此适用于水和废水处理厂。它们可用于管道系统、过滤装置和化学计量系统。
