1306791 Iron/chromium alloys E I DU PONT DE NEMOURS & CO 8 Jan 1971 [9 Jan 1970] 1056/71 Addition to 1183656 Heading C7A An iron/ chromium alloy comprises 28-35 wt. per cent Cr, up to 1 wt. percent Si, up to 1À5 wt. per cent Mn, the balance being iron, carbon and nitrogen, the maximum of the sum of the carbon and nitrogen contents varying linearly from 116 p. p. m at 28 wt. per cent Cr content to 10 p. p. m. at 35 wt. per cent Cr content. The alloy possesses good post-weld ductility. Samples of the alloy having Cr, C and N contents within the above ranges and having 1% Si and 1À5% Mn contents were tested for corrosion resistance by first rolling at 2300‹C. and annealing at 850‹C. for 30 minutes, then simulating a weld by striking an electric arc to the centre of alloy contained in a water-cooled copper crucible . Similar tests were carried out on samples of alloys with C+N content 116-253 p.p.m.
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机译：1306791铁/铬合金E DU PONT DE NEMOURS＆CO 1971年1月8日[1970年1月9日] 1056/71添加到1183656税目C7A中铁/铬合金的含量为28-35 wt％。铬含量不超过1 wt。 Si含量最高可达1-5 wt。锰含量百分比，其余为铁，碳和氮，碳和氮含量总和的最大值从116 p开始线性变化。 p。 m在28 wt。铬含量达10 p。 p。米在35 wt。铬含量百分比。该合金具有良好的焊接后延展性。 Cr，C和N含量在上述范围内，Si含量为1％，Mn含量为1-5％的合金样品，首先在2300°C下轧制，测试其耐腐蚀性。并在850℃下退火。持续30分钟，然后通过在水冷铜坩埚中所含合金的中心产生电弧来模拟焊接。对C + N含量为116-253 p.p.m的合金样品进行了类似的测试。
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