GB/T 14994-2008 English PDF (GBT14994-2008)

Delivery: 3 seconds. Download true-PDF + Invoice.
Get QUOTATION in 1-minute: Click GB/T 14994-2008
Historical versions: GB/T 14994-2008
Preview True-PDF (Reload/Scroll if blank)

GB/T 14994-2008: Superalloy cold drawn bars
GB/T 14994-2008
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.140
H 57
Replacing GB/T 14994-1994
Superalloy cold drawn bars
ISSUED ON: MAY 13, 2008
IMPLEMENTED ON: NOVEMBER 01, 2008
Issued by: General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration of the People's Republic of
China.
Table of Contents
Foreword ... 3 
1 Scope ... 4 
2 Normative references ... 4 
3 Order content ... 9 
4 Size, shape and allowable deviation ... 9 
5 Technical requirements ... 10 
6 Test methods ... 18 
7 Inspection rules ... 19 
8 Packaging, marks and quality certificate ... 20 
Superalloy cold drawn bars
1 Scope
This Standard specifies the dimensions, shapes and allowable deviations,
technical requirements, test methods, inspection rules, packaging, marks and
quality certificate for superalloy cold drawn bars.
This Standard is applicable to superalloy cold drawn bars. It can be used to
manufacture industrial fasteners and other parts.
2 Normative references
The provisions in following documents become the provisions of this Standard
through reference in this Standard. For dated references, the subsequent
amendments (excluding corrigendum) or revisions do not apply to this Standard,
however, parties who reach an agreement based on this Standard are
encouraged to study if the latest versions of these documents are applicable.
For undated references, the latest edition of the referenced document applies.
GB/T 223.3, Methods for chemical analysis of iron, steel and alloy. The
diantipyryl methane phosphomolybdate gravimetric method for the
determination of phosphorus content
GB/T 223.4, Methods for chemical analysis of iron, steel and alloy - The
volumetric method for determination of manganese content by ammonium
nitrate oxidation
GB/T 223.8, Methods for chemical analysis of iron, steel and alloy - The
sodium fluoride separation - EDTA volumetric method for the determination
of aluminium content
GB/T 223.9, Methods for chemical analysis of iron, steel and alloy - The
chrome azurol S photometric method for the determination of aluminium
content
GB/T 223.10, Methods for chemical analysis of iron, steel and alloy - The
cupferron separation-chrome azurol S photometric method for the
determination of aluminium content
GB/T 223.11, Methods for chemical analysis of iron, steel and alloy -
ammonium sulfate oxidation volumetric method for the determination of
GB/T 223.30, Methods for chemical analysis of iron, steel and alloy - The
arsenazo III spectrophotometric method for the determination of zirconium
content after separation by p-bromomandelic acid
GB/T 223.31, Methods for chemical analysis of iron, steel and alloy - The
distillation-molybdenum blue spectrophotometric method for the
determination of arsenic content
GB/T 223.33, Methods for chemical analysis of iron, steel and alloy. The
chlorophosphonazo mA photometric method for the determination of cerium
content after extraction separation
GB/T 223.36, Methods for chemical analysis of iron, steel and alloy. The
neutral titration method for the determination of nitrogen content after
distillation separation
GB/T 223.37, Methods for Chemical Analysis of Iron, Steel and Alloy - the
Indophenol Blue Photometric Method for the Determination of Nitrogen
Content after Distillation Separation
GB/T 223.38, Methods for chemical analysis of iron, steel and alloy. The
distillation-molybdenum blue spectrophotometric method for the
determination of arsenic content
GB/T 223.40, Methods for chemical analysis of iron, steel and alloy - The
anion-exchange separation-sulphochlorophenol S photometric method for
the determination of niobium content
GB/T 223.46, Methods for chemical analysis of iron, steel and alloy - The
flame atomic absorption spectrometric method for the determination of
magnesium content
GB/T 223.47, Methods for chemical analysis of iron, steel and alloy - The
carrier precipitation-molybdenum blue photometric method for the
determination of antimony content
GB/T 223.48, Methods for chemical analysis of iron, steel and alloy - The
semixylenol orange photometric method for the determination of bismuth
content
GB/T 223.59, Methods for chemical analysis of iron, steel and alloy - The
reduced molybdoantimonyl phosphoric acid photometric method for the
determination of phosphorus content
GB/T 223.60, Methods for chemical analysis of iron, steel and alloy - The
perchloric acid dehydration gravimetric method for the determination of
silicon content
YB/T 5293, Metallic materials - Forging test
3 Order content
The contract or order for ordering according to this Standard shall include the
following:
a) Reference to this Standard;
b) Alloy designation;
c) Smelting method;
d) Weight (or quantity);
e) Dimensions;
f) Delivery state and group;
g) Size tolerance level;
h) Fixed-ruler length and double length (specify when required);
i) Other requirements.
4 Size, shape and allowable deviation
4.1 For round bars with a nominal diameter of 8mm~45mm and square bars
with a nominal side length of 8mm~30mm, the allowable deviation of the size
shall comply with the requirements for level h11 or h12 in GB/T 905-1994, which
shall be indicated in the contract.
4.2 For hexagonal bars with an inscribed circle with a nominal diameter of
8mm~36mm, the allowable deviation of the size shall comply with the
requirements for level h12 in GB/T 905-1994.
4.3 The length of the bar shall generally be greater than 2000mm. The number
of bars with a length of 1000mm~2000mm in each batch is allowed not to
exceed 20% of the total number. If the length is shorter than 1000mm, but not
shorter than 500mm, there shall be no more than 5 pieces per batch.
4.4 When the order size exceeds the range, the allowable deviation is
negotiated by the supplier and the purchaser.
4.5 The bar shape shall meet the requirements of GB/T 905-1994.
5.2.1 GH1040, GH2036, GH2132, GH3030, GH4033 and GH4169 alloy bars
are delivered in solution treatment, solution treatment + pickling, solution
treatment + polished or cold drawn state.
5.2.2 GH4080A and GH4090 alloy bars are delivered in cold drawn + polished
or solid solution deoxidized state. The cold drawing deformation of the bar after
the final intermediate annealing shall be 80%~12%.
5.2.3 GH2696 bars are delivered in one of the following groups:
Group I: the bars are treated with 1100°C, 0.5h~2h, oil-cooled or water-cooled
solution treatment, alkaline pickled and cold drawn. The recommended
deformation is 15%~25%;
Group II: the bars are treated with 1100°C, 0.5h~2h, oil-cooled or water-cooled
solution treatment, alkaline pickled and cold drawn. The recommended
deformation is 35%~45%;
Group III: general cold drawn state;
Group IV: cold drawn + solid solution state.
5.2.4 The delivery state and group of bars shall be indicated in the order
contract. The supplier shall indicate the delivery state and group in the quality
guarantee.
5.3 Chemical composition
5.3.1 The chemical composition of the alloy (melting analysis) shall meet the
requirements of Table 2.