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GB/T 223.40-2007 Active
GB/T 223.40-2007 Iron,steel and alloy—Determination of niobium content by the sulphochlorophenol S spectrophotometric method
Abstract
This part of GB/T 223 specifies the determination of niobium content by the chlorosulfonic acid S spectrophotometry method. This part is applicable to the determination of niobium content in carbon steel and low-alloy steel with a mass fraction of 0.010% to 0.50%.
General Product Information
| Document Type | National standards |
|---|---|
| Standard Status | Active |
| Standard Code | GB/T 223.40-2007 |
| CCS | Analysis methods for steel and iron alloys |
| ICS | Chemical analysis of metal materials |
| Implement Date | 2007-10-01 |
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