GB/T 3795-2014Ferromanganese (English PDF)

Foreword

This standard was drafted in accordance with GB/T 1.1-2009 given rules. This standard replaces GB/T 3795-2006 "ferromanganese." This standard compared with GB/T 3795-2006, mainly on the technical content of the following changes.

--- Micro-carbon ferromanganese furnace increases the categories;

--- Reduce the major impurity element phosphorus, silicon content, improve the standard level;

--- The product size range has been adjusted. The standard proposed by China Iron and Steel Association. This standard by the national pig iron and ferroalloy Standardization Technical Committee (SAC/TC318) centralized. This standard was drafted. Shanxi Jiaocheng Yiwang ferroalloy limited liability company, Shanxi Eastern Resources Development Co., Ltd., Metallurgical Industry Information Standards Research Institute. The main drafters of this standard. Le Song Jin, Kang Guozhu, WANG Cheng-guo, Shuli. This standard replaces the standards previously issued as follows:

--- GB 3795-1983, GB 3795-1987, GB/T 3795-1996, GB/T 3795-2006. Ferromanganese

1 Scope

China's national standard for ferromanganese. It specifies the product classification, the technical requirements, the test methods, the inspection rules and the packaging, storage, transport and marking. Ferromanganese is the alloy through which manganese enters steel, and manganese is the one alloying element that essentially all steel contains. It is there for two reasons that are usually forgotten because they are so basic. It deoxidises - it takes oxygen out of the liquid steel that would otherwise form blowholes - and it combines with sulfur, which would otherwise form iron sulfide films at the grain boundaries and make the steel crack when hot rolled. Beyond that it strengthens and improves hardenability cheaply. The grades are distinguished mostly by carbon content, since a low carbon steel cannot be alloyed with a high carbon ferroalloy, and the low carbon grades cost considerably more to make.

This standard specifies the product classifications, technical requirements, test methods, inspection rules and packaging, storage and transportation, marking and certification of ferromanganese. This standard applies to steelmaking, casting deoxidizer and alloying elements additives ferromanganese.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein Member. For undated references, the latest edition (including any amendments) applies to this document. General provisions

GB/T 3650 inspection, packing, storage and transportation, marking and certification of

GB/T 4010 alloy chemical analysis and preparation of samples

GB/T 5686.1 ferromanganese, ferromanganese silicon nitride, ferromanganese and manganese metal manganese content by potentiometric titration, oxidation of ammonium nitrate drops Titration and titration with perchloric acid oxidation

GB/T 5686.2 ferromanganese, ferromanganese silicon nitride, silicon manganese and ferromanganese - Determination of molybdenum blue photometric method, silicon potassium fluoride titration Perchloric acid method and gravimetric method

GB/T 5686.4 ferromanganese, silicon manganese alloys, manganese and ferromanganese phosphorus content - Molybdenum blue photometric method and alkali titration

GB/T 5686.5 ferromanganese, ferromanganese silicon nitride, carbon ferromanganese and manganese metal - Determination of infrared absorption method, the gas volumetric method, Gravimetric and the coulometric method

GB/T 5686.7 ferromanganese, silicon manganese alloys, manganese and ferromanganese nitride, sulfur content - Infrared absorption method and combustion and dropping Titration

GB/T 7738 ferroalloy product grades that way Sampling and testing methods

GB/T 13247 ferroalloy product particle size

3 Product Categories

3.1 By refining different ways, divided into ferromanganese and blast furnace ferromanganese.

3.2 according to carbon content, divided into four categories.

--- Micro carbon-based. not more than 0.15% carbon;

--- Carbon categories. carbon greater than

0.15 to

0.7 percent;

--- Carbon categories. carbon greater than

0.7 to 2.0%;

--- High Carbon categories. carbon greater than

3.3 by silicon, phosphorus, divided into two groups. I, II.

4 Grades representation

Grades representation ferromanganese according to the provisions of GB/T 7738, and (chemical symbol "Fe" indicates) by the elements iron alloy products, the main Its percentage content of Mn, mainly carbon content and the highest percentages or groups represented. Example. FeMn90C0.05