Chromium metal—Determination of oxygen, nitrogen and hydrogen content—Inert gas fusion thermal infrared detection method and conductivity method
全国生铁及铁合金标准化技术委员会(SAC/TC 318)
GB/T 4702的本部分规定了用红外法测定氧含量、氢含量；用热导法测定氮含量。
本部分适用于金属铬中氧含量、氮含量、氢含量的测定。氧含量的测定范围（质量分数）:0.010%～0.800%；氮含量的测定范围（质量分数）：0.001%～0.070%；氢含量的测定范围（质量分数）：0.001%～0.050%。
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