GOST 4.439-86
GOST 4.439−86 the System of indicators of product quality (CPK). Casting. Nomenclature of indices
GOST 4.439−86
A Group Of Kzt51.
INTERSTATE STANDARD
The system of indicators of product quality
CASTING
Nomenclature of indices
Product-quality index system. Castings. Index nomenclature
OKP 41 1000
Date of introduction 1987−07−01
Resolution of the USSR State Committee on standards of 24 June 1986 N 1716 the introduction of set with 01.07.87
REPRINTING.
The standard establishes the nomenclature of the main indicators of quality of castings to be included in design and review standards for casting, TU and KU.
1. NOMENCLATURE OF INDICES
1.1. The range of indicators of the quality of the castings are given in table.1.
Table 1
Name quality indicator |
Designation of indicator of the quality |
Name characterized by the properties | |
1. INDICATORS | |||
1.1. Grade |
MS | - | |
1.2. Accuracy class |
CT |
- | |
1.3. Complexity group |
GS |
- | |
1.4. Casting weight, kg |
- | ||
1.5. Overall dimensions, mm |
|||
2. INDICATORS OF DESTINATION | |||
2.1. Temporary resistance, |
Strength | ||
2.2. Yield strength, |
The same | ||
2.3. Elongation, % |
Plasticity | ||
2.4. The relative narrowing, % |
The same | ||
2.5. Impact strength, kJ/m(kgf·m/cm) |
Resistance to impact damage | ||
2.6. The upper limit of hardness, NV |
Machinability, wear resistance | ||
2.7. Lower limit of hardness, NV |
Machinability, wear resistance, durability against mechanical damage to the surface | ||
2.8. The unevenness of hardness |
Even tread wear | ||
2.9. Microstructure |
Performance and mechanical properties | ||
3. THE INDICATORS OF ECONOMICAL USE OF METAL AND TECHNOLOGY | |||
3.1. The machining allowances, mm |
The complexity of machining | ||
3.2. Dimensional tolerances of castings, mm |
Dimensional accuracy | ||
3.3. TAlsina uncultivated walls and edges, mm |
Metal | ||
3.4. The thickness tolerances of the machined walls and edges, mm |
Dimensional accuracy | ||
3.5. The shift from the flatness of the surface length 600 mm |
The same | ||
3.6. The mass tolerances of the casting, % |
Precision mass | ||
4. THE QUALITY OF SURFACE | |||
4.1. Surface roughness according to GOST 2789−73, µm |
Appearance | ||
5. ECONOMIC INDICATORS | |||
5.1. Economic (economic) effect, RUB |
Savings in the manufacture and consumption of castings |
1.2. The range of indicators may optionally include other indicators, set forth in normative-technical documentation on casting: relative wear resistance, impact strength at low temperatures, impermeability, density, dimensional stability in time, etc.
1.3. Alphabetical list of indicators of the quality of the castings is given in the Appendix.
2. APPLICABILITY OF INDICATORS OF QUALITY CASTINGS
2.1. A list of basic quality indicators:
grade;
temporary resistance;
yield strength;
elongation;
the upper limit of hardness;
the lower limit of hardness;
the machining allowances;
uncultivated thickness of the walls and edges;
the dimensional tolerances of the casting;
the roughness of the surface.
2.2. Applicability of indicators of quality of castings to be included in design and review standards for casting, TU and KU, are given in table.2 for iron castings, in table.3 — casting of steel and in table.4 — casting of non-ferrous alloys.
Table 2
The indicator number in the table.1 | The scope of the index for iron castings | ||
Standards (except GOST OTT) |
TU |
KU | |
1.1 |
+ |
+ |
+ |
1.2 |
+ |
+ | + |
1.3 |
+ |
+ |
+ |
1.4 |
+ |
+ |
+ |
1.5 |
+ |
+ |
+ |
2.1 |
+ |
+ | + |
2.2 |
± |
± |
± |
2.3 |
± |
± |
± |
2.4 |
- |
- |
- |
2.5 |
± | ± | ± |
2.6 |
+ |
+ |
+ |
2.7 |
+ |
± |
± |
2.8 |
± | - |
- |
2.9 |
+ | ± | - |
3.1 |
+ |
+ |
+ |
3.2 |
+ |
+ |
+ |
3.3 |
+ |
- |
- |
3.4 |
+ |
+ |
+ |
3.5 |
+ |
+ |
+ |
3.6 |
+ | + |
+ |
4.1 |
+ | + |
+ |
5.1 |
- |
- |
- |
Table 3
The indicator number in the table.1 | The scope of the measure casting of steel | ||
Standards (except GOST OTT) |
TU |
KU | |
1.1 |
+ |
+ |
+ |
1.2 |
+ |
+ |
+ |
1.3 |
+ | + | + |
1.4 |
+ |
+ | + |
1.5 |
+ |
+ |
+ |
2.1 |
+ | + |
+ |
2.2 |
+ | + |
+ |
2.3 |
+ |
± |
± |
2.4 |
+ |
± | ± |
2.5 |
+ | ± |
± |
2.6 |
± | ± | ± |
2.7 |
± | ± | ± |
2.8 |
± |
- |
- |
2.9 |
± |
- |
- |
3.1 |
+ |
+ |
+ |
3.2 |
+ |
+ |
+ |
3.3 |
+ |
- |
- |
3.4 |
+ | ± | ± |
3.5 |
± | ± | ± |
3.6 |
+ | + |
+ |
4.1 |
+ |
+ |
+ |
5.1 |
- |
- |
- |
Table 4
The indicator number in the table.1 | The scope of indicators for casting of non-ferrous alloys | ||
Standards (except GOST OTT) |
TU |
KU | |
1.1 |
+ |
+ | + |
1.2 |
+ |
+ | + |
1.3 |
+ |
+ |
+ |
1.4 |
+ |
+ |
+ |
1.5 |
+ |
+ |
+ |
2.1 |
+ |
+ |
+ |
2.2 |
± |
± | ± |
2.3 |
± |
± | ± |
2.4 |
- |
- |
- |
2.5 |
± |
± | ± |
2.6 |
± | ± | ± |
2.7 |
+ |
+ |
+ |
2.8 |
± |
- |
- |
2.9 |
- |
- |
- |
3.1 |
+ |
+ |
+ |
3.2 |
+ |
+ |
+ |
3.3 |
± |
- |
- |
3.4 |
± |
± | ± |
3.5 |
- |
- |
- |
3.6 |
+ |
+ | + |
4.1 |
± | ± | ± |
5.1 |
± | - |
- |
Notes:
1. To assess the quality of castings indicators of quality compared with domestic and foreign counterparts. With domestic counterparts are comparing all the indicators, except for the group classification and the economic and foreign — only parameters of use, economical use of metal and technology (except for indicators 3.3 and 3.4), the quality of the surface.
2. The «+" sign means assignment, the sign «-" — neprimirimost, the sign «+ «and limited the applicability of appropriate indicators of the quality of castings.
APPLICATION (reference). ALPHABETICAL LIST OF INDICATORS OF THE QUALITY OF CASTINGS
APP
Reference
The viscosity of the shock |
2.5 |
Complexity group |
1.3 |
The tolerances of a mass casting |
3.6 |
Dimensional tolerances of castings |
3.2 |
The thickness tolerances of the machined walls and edges |
3.4 |
Accuracy class |
1.2 |
Grade |
1.1 |
Casting weight |
1.4 |
Microstructure |
2.9 |
The unevenness of hardness |
2.8 |
The upper limit of hardness |
2.6 |
The lower limit of hardness |
2.7 |
Yield strength |
2.2 |
The machining allowances |
3.1 |
Dimensions overall |
1.5 |
The shift from the flatness of the surface length 600 mm |
3.5 |
Resistance temporary | 2.1 |
The narrowing of the relative |
2.4 |
Uncultivated thickness of the walls and edges | 3.3 |
Elongation relative | 2.3 |
Surface roughness | 4.1 |
The effect of economic (national economic) | 5.1 |
The electronic text of the document
prepared by JSC «Code» and checked by:
the official publication of the
Casting of metals and alloys: SB. Standards. -
M.: IPK Publishing house of standards, 2002