GB/T 28702-2012Nodularizer for spheroidal graphite cast iron (English PDF)
球墨铸铁用球化剂
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
September 3, 2012
Implementation date
March 1, 2013
Scope
GB/T 28702-2012 is the English-translated version of 球墨铸铁用球化剂.
GB/T 28702-2012 is the Chinese standard "Nodularizer for spheroidal graphite cast iron". Its scope clause reads: This standard specifies the technical requirements of ductile iron ball agent, test methods, inspection rules, packaging, storage and transportation, marking and certification.
This standard applies to hot melt production of ductile iron with a rare earth magnesium ball agent.
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Document preview — GB/T 28702-2012
National Standard of the People's Republic of China
- ICS
- 77.100
- Classification
- J 31
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- Foreword
- 1 Scope
- 2 Normative references
- 3 Terms and definitions
1 Scope
This standard specifies the technical requirements of ductile iron ball agent, test methods, inspection rules, packaging, storage and transportation, marking and certification.
This standard applies to hot melt production of ductile iron with a rare earth magnesium ball agent.
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
Sampling and testing methods GB/T 13247 ferroalloy product particle size
Determination of total rare. GB/T 16477.1 rare earth ferrosilicon alloy and silicon magnesium alloy chemical analysis method Part 1
GB/T 16477.2 rare earth ferrosilicon alloy and silicon magnesium alloy chemical analysis - Part 2. Calcium, magnesium, manganese content - Inductively
Coupled Plasma Atomic Emission Spectrometry
Inductively MgO content. GB/T 16477.3 rare earth ferrosilicon alloy and silicon magnesium alloy chemical analysis - Part 3
Coupled Plasma Atomic Emission Spectrometry
Determination of silicon content. GB/T 16477.4 rare earth ferrosilicon alloy and silicon magnesium alloy chemical analysis methods - Part 4
GB/T 16477.5 rare earth ferrosilicon alloy and silicon magnesium alloy chemical analysis - Part 5. titanium content - Inductively coupled plasma
Plasma emission spectrometry
GB/T 24194 ferrosilicon aluminum, calcium, manganese, chromium, titanium, copper, and nickel phosphorus content by inductively coupled plasma atomic emission
Spectroscopy
Grade 3
Nodulizer according to the chemical composition is divided into 12 grades, see Table 1.
4. Technical Requirements
4.1 Chemical composition
Nodulizer chemical composition shall comply with the requirements of Table 1. The demand side of the chemical composition have special requirements, agreed upon by both parties.
Table 1 Nodulizer grades and chemical composition of the mass fraction,%
Grade Mg RE Si Al Ti other
Mg4RE 3.5 ~ 4.5> 0 ~ 1.5 <=48.0 < 1.0 < 0.5 Balance
Mg4RE2 3.5 ~ 4.5> 1.5 ~ 2.5 <=48.0 < 1.0 < 0.5 margin
Mg5RE> 4.5 ~ 5.5> 0 ~ 1.5 <=48.0 < 1.0 < 0.5 margin […]
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
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