GB/T 33216-2016Steel open die forgings on hammer—Classification of complexity and equivalent coefficient (English PDF)
锤上钢质自由锻件 复杂程度分类及折合系数
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
December 13, 2016
Implementation date
July 1, 2017
Scope
GB/T 33216-2016 is the English-translated version of 锤上钢质自由锻件 复杂程度分类及折合系数.
GB/T 33216-2016 fixes the complexity classification and the equivalent coefficient for steel open die forgings produced on hammers. Clause 1 applies it to general-purpose carbon steel and structural alloy steel open die forgings on hammer, including tire die forgings.
The same clause states what it is for: it may be used as a basis for compiling statistics of the standard production volume of forgings and for setting production and energy consumption quotas, and enterprises may also take it as a reference when setting sale prices.
Its contents list is short, naming a foreword, the scope, a clause on the classification of complexity for steel open die forgings on hammer, and a clause on the equivalent coefficient.
The classification clause sorts the forgings into nine types according to the complexity of the forging shape, as laid out in Table 1.
The equivalent coefficient clause assigns a nominal equivalent coefficient to each type in Table 2, taking Type VII forgings as the benchmark with a nominal equivalent coefficient of 1, and then corrects that value for the tonnage of the equipment used in production, for the batch size of the forgings and for the grade of steel, each through its own table.
It also directs that a forging billet pre-forged by hot die forging be assigned a type by shape and then moved down one type for calculation, except where it already belongs to Type IX, which is calculated as Type IX.
The standard was proposed by and placed under the jurisdiction of National Technical Committee 74 on Forging (SAC/TC 74). It was issued on 13 December 2016 and has applied since 1 July 2017.
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Document preview — GB/T 33216-2016
National Standard of the People's Republic of China
- ICS
- 77.140.85
- Classification
- J 32
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- Foreword3
- 1 Scope4
- 2 Classification of Complexity for Steel Open Die Forgings on Hammer4
- 3 Equivalent Coefficient9
Foreword
This Standard was drafted in accordance with the rules in GB/T 1.1-2009.
1 Scope
This Standard stipulates the classification of complexity and equivalent coefficient for steel open die forgings on hammer.
This Standard is applicable to general-purpose carbon-steel and structural alloy-steel open die forgings (including tire die forgings) on hammer.
This Standard may be considered as a basis for the statistics of the standard production volume of forgings, and the formulation of production quota and energy consumption. In addition, it may also be considered as a reference for enterprises in the formulation of sale price.
2 Classification of Complexity for Steel Open Die Forgings on Hammer
In this Standard, steel open die forgings are classified into 9 types in accordance with the complexity of forging shapes, as it is shown in Table 1.
3 Equivalent Coefficient
The nominal equivalent coefficient of each type of forgings shall comply with the stipulations in Table 2. In this Standard, Type-VII forgings are taken as the benchmark (nominal equivalent coefficient Zm = 1), which is corrected in accordance with the following circumstances:
a) Correct in accordance with Table 3 and the tonnage of equipment used in forging production;
b) Correct in accordance with Table 4 and the batch of forgings;
c) In terms of forging billet which are pre-forged through hot die forging, determine the type in accordance with the shape, then, lower to an inferior type for calculation (for example, lower Type-I to Type-II, and so forth). However, if it belongs to Type-IX, it shall still be calculated as Type-IX;
d) Correct in accordance with Table 5 and the grade of steel used for the forgings. […]
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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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