| 说明 | Stainless Steel Plate | 标准： | 美国材料试验协会 A240 / 美国机械工程师学会 SA240 |
|---|---|---|---|
| 年级 | SS904L/UNS NO8904 | 尺寸 | 15mm-6000mm，1/2′-120’，DN 10 To DN 3000 MM |
| 技术： | Cold Rolled / Hot Rolled | 包装 | Wooden Pallets With Waterproof Paper |
| 强光 | Stainless Steel Sheet Coil， No8904 Stainless Steel Sheet Coil， Hot Rolled Steel Plate Coil | ||
A240/SA240 SS904L NO8904 不锈钢冷轧板
概述
Because the carbon content of 904L is very low (maximum 0.020%)， there will be no carbide precipitation under general heat treatment and welding conditions. This eliminates the risk of intergranular corrosion after general heat treatment and welding. Due to the high content of chromium， nickel and molybdenum and the addition of copper， 904L can be passivated even in reducing environment， such as sulfuric acid and formic acid. The high nickel content makes it have a lower corrosion rate in the active state. The corrosion resistance of 904L is better than that of conventional stainless steel.
904L steel has high resistance to pitting corrosion. In chloride solution， its crack corrosion resistance is also very good. The high nickel content of 904L reduces the corrosion rate at pits and crevices. When the temperature of ordinary austenitic stainless steel is higher than 60 ℃， it may be sensitive to stress corrosion in a chloride-rich environment. This sensitivity can be reduced by increasing the nickel content of stainless steel. Due to the high nickel content， 904L has high resistance to stress corrosion cracking in chloride solution， concentrated hydroxide solution and hydrogen sulfide rich environment.
SS904L Chemical Composition
| 要素 | SS 904L |
| C | 最大 0.020 |
| 锰 | 2 最大值 |
| Si | 1 最大值 |
| P | 0.040 最大值 |
| S | 最大 0.030 |
| Cr | 19 - 23 |
| 倪 | 23 - 28 |
| 莫 | 4 - 5 |
| 铜 | 1 - 2 |
SS904L Mechanical Properties
| 要素 | SS904L |
| 密度 | 7.95 克/立方厘米 |
| 熔点 | 1350°C (2460°F) |
| 拉伸强度 | Psi - 71000 , MPa - 490 |
| 屈服强度（0.2%Offset） | Psi - 32000 , MPa - 220 |
| 伸长率 | 35% |
A240 SS904L Stainless Steel Plate Applications:
- Air Pollution Control — scrubbers for coal-fired power plants
- Chemical Processing — process equipment for the production of sulfuric， phosphoric， inorganic and organic acids and the production of phosphate-based fertilizers
- Metallurgical Processing — pickling equipment using sulfuric acid
- Oil and Gas Production — offshore process equipment
- Pharmaceutical Industry — process equipment
- Pulp and Paper — processing equipment
- Seawater and Brackish Water — condensers， heat exchangers and piping systems
A240 SS904L Stainless Steel Plate Test Certificates:
- EN 10204/3.1B，EN 10204/3.1B。
- 原材料证书
- 100% 射线照相测试报告
- 第三方检验报告等
Material Tests:
- 面积拉伸等机械测试
- 硬度测试
- 化学分析 - 光谱分析
- 阳性材料鉴定 - PMI 测试
- 扁平化测试
- 微观和宏观测试
- 抗点蚀试验
- 扩口试验
- 晶间腐蚀 (IGC) 试验
