德意志民主共和国牌号 N8、N10两种低合金抗氢钢具有满意的抗氢性能,和良好的抗蠕变性能(化学成分见表1,机械性能见表2),可以代替18—8铬镍不锈钢,作为200大气压、350℃高压加氢管道用。但是它们容易过热,有显微裂纹敏感性,在焊接上有困难,因而焊接接头质量是使用上述新材料的关键间题。 Germany Democratic Republic of the brand N8, N10 two low-alloy hydrogen resistant steel with satisfactory hydrogen resistance, and good creep resistance (chemical composition shown in Table 1, mechanical properties in Table 2), you can replace 18-8 Chromium Nickel Stainless Steel , As 200 atmospheres, 350 ℃ high pressure hydrogenation pipeline. However, they are prone to overheating, are susceptible to microcracking and have difficulties in welding, so the quality of welded joints is a key issue for the use of these new materials.