JB/T 7948.8-2017Methods for chemical analysis of welding fluxes - Part 8: Determination of carbon and sulfur content (English PDF)

1 Foreword

JB/T 7948.8-2017 was issued by Ministry of Industry and Information Technology of the People's Republic of China on 7 November 2017 and has been in force since 1 April 2018.

It replaces the earlier edition JB/T 7948.8-1999.

It is one of 20 parts of the JB/T 7948 series.

2 Scope

This standard is the Chinese machinery industry standard for determining the carbon and sulfur content of welding fluxes, the eighth part of the JB/T 7948 methods of chemical analysis. It states the principle on which the determination rests and names the reagents and the instruments it requires. It then covers the sample, the analytical procedure, the calculation of the result and the difference permitted between determinations. The standard is recommended, with the Chinese classification J33 and the international classification 25.160.20. It quotes GB/T 6682 and GB/T 20123-2006.

3 Normative references

JB/T 7948.8-2017 cites the following standards, which apply in full or in part through the references made to them in its clauses.

GB/T 6682

GB/T 20123-2006 — Steel and iron -- Determination of total carbon and sulfur content Infrared absorption method after combustion in an induction furnace (routine method)

4 About this standard

Issued by: Ministry of Industry and Information Technology of the People's Republic of China

English translation: about 15 pages

5 Related standards

Other parts of this standard:

JB/T 7948.1-1999 — Methods for chemical analysis of fused welding fluxes - Determination of silicon dioxide content by gravimetric method

JB/T 7948.1-2017 — Part 1: Determination of silicon dioxide content

JB/T 7948.2-1999 — Methods for chemical analysis of fused welding fluxes - Determination of manganese oxide content by potentiometric titration method

JB/T 7948.2-2017 — Part 2: Determination of manganese oxide content

JB/T 7948.3-1999 — Methods for chemical analysis of fused welding fluxes - Determination of manganese oxide content by permanganate photometric method

JB/T 7948.3-2017 — Part 3: Determination of aluminium oxide content

JB/T 7948.4-1999 — Methods for chemical analysis of fused welding fluxes - EDTA volumetric method for determination of aluminium oxide content

JB/T 7948.4-2017 — Part 4: Determination of iron oxide content

JB/T 7948.5-1999 — Methods for chemical analysis of fused welding fluxes - Determination of iron oxide content by sulfosalicylic acid photometric method

JB/T 7948.5-2017 — Part 5: Determination of calcium fluoride content

JB/T 7948.6-1999 — Methods for chemical analysis of fused welding fluxes - Determination of calcium fluoride content by pyrohydrolysis method

JB/T 7948.6-2017 — Part 6: Determination of phosphorus content

JB/T 7948.7-1999 — Methods for chemical analysis of fused welding fluxes - Determination of calcium fluoride content by lead chlorofluoride-EDTA volumetric method

JB/T 7948.7-2017 — Part 7: Determination of sodium oxide and potassium oxide content

JB/T 7948.9-1999 — Methods for chemical analysis of fused welding fluxes - Determination of sodium oxide and potassium oxide content by flame photometry

JB/T 7948.9-2017 — Part 9: Determination of calcium oxide and magnesium oxide content

JB/T 7948.10-1999 — Methods for chemical analysis of fused welding fluxes - Determination of carbon content by combustion-coulometric method

JB/T 7948.11-1999 — Methods for chemical analysis of fused welding fluxes - Determination of sulfur content by combustion-iodometric method

JB/T 7948.12-1999 — Methods for chemical analysis of fused welding fluxes - Determination of calcium oxide and magnesium oxide content by EDTA volumetric method

Other editions:

JB/T 7948.8-1999 (earlier edition)

6 Classification and status

International classification (ICS): 25.160.20

Prefix JB/T: recommended standard.