| 规格 | ASTM A268.ASME SA268 | 年级 | TP409 |
|---|---|---|---|
| 类型 | 无缝，焊接 | 测试： | 无损检测，IBR |
| 完成： | 退火和酸洗，光亮退火，抛光 | 表面： | 抛光，镜面，光亮，酸洗 |
| 强光 | Ferritic Seamless Tube， 1.4512 Seamless Tube， Martensitic Stainless Steel Seamless Tube | ||
Ferritic Martensitic Seamless Tube ASTM A268 TP409 1.4512 S40900
This specification covers a number of grades of nominal-wall-thickness， stainless steel tubing for general corrosion-resisting and high-temperature service. Most of these grades are commonly known as the “straight-chromium” types and are characterized by being ferromagnetic.
钢管必须采用无缝或焊接工艺制造，不得添加填充金属，钢管必须重新加热至 1200 华氏度 [650 摄氏度] 或更高温度，并冷却至符合本规范要求，所有钢管必须没有过多的轧制鳞片，适合检查。轻微的氧化不视为水垢。
Grade 409 stainless steel is a Ferritic steel that offers good mechanical properties and high-temperature corrosion resistance. It is commonly considered as a chromium stainless steel， with applications in exhaust systems of automobiles and applications that demand weldability.
TP409 stainless grade combines the following characteristics:
-Basic corrosion and oxidation resistance
-Composition balanced for optimum formability
-Weldable only in thin sections due to fully ferritic structure
-Low cost and limited cost variation due to low alloy content
化学成分
| 等级 | C | Si | 锰 | P | S | Cr | 倪 | Ti |
| TP409 | 0.08 最大值 | 最大 1.00 | 最大 1.00 | 0.045 最大值 | 最大 0.030 | 10.5~11.7 | 最大 0.5 | 最低 6*C，最高 0.75 |
409 Stainless Steel Tubing Tolerance
Stainless Steel 409 Tube OD | Stainless Steel 409 Tube Tolerance |
|---|---|
4mm to 35mm | +/- 0.08 毫米 |
35mm to 38mm | +/- 0.15 毫米 |
38mm to 60mm | +/- 0.20 毫米 |
60mm and above | +/- 0.25 毫米 |
等效材料
标准 | WERKSTOFF NR. | UNS | JIS | KS |
TP409 | 1.4512 | S40900 | SUS409 | STS409 |
机械性能
| 等级 | 拉伸强度 | 屈服强度 | 伸长率 |
| TP409 | 380 | 170 | 20 |
物理特性
| 等级 | 密度（千克/立方米） | 弹性模量（GPa） | 平均热膨胀系数 (μm/m/°C) | 导热系数（瓦/米.K） | 比热 0-100°C (J/kg.K) | 电阻率（nΩ.m） | |||
| 0-100°C | 0-315°C | 0-538°C | 100°C 时 | 在 500°C 时 | |||||
| TP409 | 7800 | 200 | 11.0 | 11.7 | 12.4 | 25.8 | 27.5 | 460 | 600 |
应用
-Aerospace – piston engine manifolds
-Chemical Processing
-Expansion Joints
-Food Processing – equipment and storage
-Petroleum Refining – polythionic acid service
-Waste Treatment – thermal oxidizers
