GB/T 20972.2-2008
石油天然氣工業.油氣開采中用于含硫化氫環境的材料.第2部分:抗開裂碳鋼、低合金鋼和鑄鐵
Petroleum and natural gas industries.Materials for use in HS-containing environments in oil and gas production.Part 2:Cracking-resistant carbon and low alloy steels,and the use of cast irons