GB/T 4008-2008 in English

《GB/T 4008-2008锰硅合金》由TC318（全国生铁及铁合金标准化技术委员会）归口，主管部门为中国钢铁工业协会。
本标准规定了锰硅合金的技术要求、试验方法、检验规则、包装、储运、标志和质量证明书。
本标准适用于炼钢及铸造作合金剂、复合脱氧剂和脱硫剂，冶炼中低碳锰铁作还原剂用的锰硅合金。

Ferromanganese-silicon

1 Scope

This standard specifies the technical requirements, test methods, inspection rules, packaging, storage, transportation, marking and quality certification of ferromanganese-silicon.

This standard is applicable to ferromanganese-silicon used as alloying agent, composite deoxidizer and desulfurizer supplied for steelmaking and foundry use, and as reducing agent in smelting medium and low carbon ferromanganese.

2 Normative references

The following documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments (excluding corrections) to, or revisions of, any of these publications do not apply to this standard. However, parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition applies.

GB/T 3650 The general rules for inspection, packing, storing, transportation, marking and certification of ferroalloy
GB/T 4010 Ferroalloys sampling and preparation of samples for chemical analysis (GB/T 4010-1994, neq ISO 4552:1987)
GB/T 5686.1 Ferromanganese, ferromanganese-silicon, nitrogen-bearing ferromanganese and manganese metal - Determination of manganese content - Potentiometric method, titrimetric method after ammonium nitrate oxidation and titrimetric method after perchloric acid oxidation (GB/T 5686.1-2008, ISO 4159:1978, MOD)
GB/T 5686.2 Ferromanganese, ferromanganese-silicon, nitrogen-bearing ferromanganese and manganese metal - Determination of silicon content - Molybdenum blue photometric method, silicon potassium fluoride titrimetric method and perchloric acid dehydration gravimetric method (GB/T 5686.2-2008, ISO 4158:1978, MOD)
GB/T 5686.4 Ferromanganese, ferromanganese-silicon, nitrogen-bearing ferromanganese and manganese metal - Determination of phosphorus content - Molybdenum blue photometric method and alkali content titrimetric method
GB/T 5686.5 Ferromanganese, ferromanganese-silicon, nitrogen-bearing ferromanganese and manganese metal - Determination of carbon content - The infrared absorption method, the gasometric method, the gravimetric and the coulometric method
GB/T 5686.7 Ferromanganese, ferromanganese-silicon, nitrogen-bearing ferromanganese and manganese metal - Determination of sulfur content - Infrared absorption method and combustion-neutralization method
GB/T 7738 Notations for designation of ferroalloys
GB/T 13247 Methods for sampling and testing the grain size of ferroalloys products (GB/T 13247-1991, neq ISO 4551:1987)

3 Technical requirements

3.1 Designation and chemical composition

3.1.1 Ferromanganese-silicon is divided into 8 designations according to the contents of manganese, silicon and impurities, and the chemical compositions shall meet those specified in Table 1.

Foreword i
1 Scope
2 Normative references
3 Technical requirements
4 Test methods
5 Inspection rules
6 Packaging, storage, transportation, marking and quality certification
Annex A (Informative) Comparison between this standard and ISO 5447:1980 in terms of clause number
Annex B (Informative) Technical differences between this standard and ISO 5447:1980 and their reasons