| 产品名称 | Carbon Steel Forged Ring | 标准： | ASTM， ASME… |
|---|---|---|---|
| 申请： | SuperHeater/ Heat Exchanger/Other Pressure Vessel | 材料 | K03506，K05001，K03017 |
| 强光 | GR2 Carbon Steel Forged Ring， Pressure Vessel Forged Ring， K03506 Pressure Vessel Parts | ||
ASME SA266 GR.2(K03506) Carbon Steel Forged Ring for Pressure Vessel Parts Application
ASTM A266/ A266M is the standard specification for carbon steel forgings for pressure vessel components. It covers four grades of carbon steel forgings for boilers， pressure vessels， and associated equipment: Grade 1， Grade 2， Grade 3， and Grade 4. The UNS number designation for each grade is K03506 [Grade 1]， K03506 [Grade 2]， K05001 [Grade 3]， and K03017 [Grade 4]， respectively. The most commonly used forgings manufactured in accordance with ASTM A266 include tube sheets， hubbed flat heads， or nozzles， that are ordered for ASME Boiler and Pressure Vessel Code applications.
钢材应通过熔炼工艺制成，随后应尽可能锻造成成品的指定形状和尺寸。ASTM A266 锻件的表面必须按照采购商的指定进行机加工。未经机加工的表面应充分无垢，以便检查。机加工一般在热处理后进行。为保证质量，不允许进行焊接修复。
化学成分要求
| 项目 | ASTM A266，% 的化学要求 | ||
| 一年级和二年级 | 3 年级 | 4 年级 | |
| C | ≤ 0.30 | ≤ 0.35 | ≤ 0.30 |
| 锰 | 0.40~1.05 | 0.80~1.35 | 0.80~1.35 |
| P | ≤ 0.025 | ≤ 0.025 | ≤ 0.025 |
| S | ≤ 0.025 | ≤ 0.025 | ≤ 0.025 |
| Si | 0.15~0.35 | 0.15~0.35 | 0.15~0.35 |
How to calculate the carbon equivalent of ASTM A266 forgings?
Carbon equivalent CE = C + Mn /6 + ( Cr + Mo + V ) / 5 + ( Ni + Cu ) / 15. The carbon equivalent shall not exceed 0.45 for Grade 1 or 0.50 for Grade 2 or 4. After forging and before reheating for heat treatment， the forgings in accordance with ASTM A266 shall be cooled in such a manner as to prevent injury and to accomplish transformation.
