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GB/T 1176-2013 English PDF (GBT1176-2013)

GB/T 1176-2013 English PDF (GBT1176-2013)

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GB/T 1176-2013: Casting copper and copper alloys

This standard specifies the designation, code, technical requirements, test methods and test rules of casting copper and copper alloys. This standard is applicable to the manufacture of copper and copper alloys castings.
GB/T 1176-2013
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
ICS 77.120.30
J 31
Replacing GB/T 1176-1987
Casting Copper and Copper Alloys
ISSUED ON: SEPTEMBER 18, 2013
IMPLEMENTED ON: JUNE 01, 2014
Issued by: General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative References ... 4
3 Designation and Code of Alloys ... 4
4 Technical Requirements ... 5
5 Test Methods ... 12
6 Test Rules ... 13
Annex A (Normative) Figures for Casting Test Block for Mechanical
Property Inspection ... 14
Annex B (Informative) The Main Features and Application Examples of
Casting Copper and Copper Alloys ... 17
Bibliography ... 22
Casting Copper and Copper Alloys
1 Scope
This standard specifies the designation, code, technical requirements, test methods and test rules of casting copper and copper alloys.
This standard is applicable to the manufacture of copper and copper alloys castings.
2 Normative References
The following referenced documents are indispensable for the application of this document. For dated reference, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 228.1 Metallic Materials - Tensile Testing - Part 1: Method of
Test at Room Temperature
GB/T 231.1 Metallic Materials - Brinell Hardness Test - Part 1: Test
Method
GB/T 5121 (All
parts)
Methods for Chemical Analysis of Copper and Copper
Alloys
GB/T 8063 Designation of Cast Nonferrous Metals and Their Alloys
YS/T 482 Methods for Analysis of Copper and Copper Alloys -
The Atomic Emission Spectrometry
3 Designation and Code of Alloys
3.1 Designation of alloys
The designation of casting copper and copper alloys shall meet the
requirements of GB/T 8063, and see Table 1 for the designation of alloys. 3.2 Alloy nomenclature
According to the requirements of GB/T 8063, the alloy is named based on the mass fraction of its major elements, e.g., 5-5-5 tin bronze, 38 brass and 25-6-3-3 aluminum brass.
4.1.2 ZCuAl10Fe3 alloy is applicable to welding parts, and the lead content shall not exceed 0.02%.
4.1.3 ZCuZn40Mn3Fe1 alloy is applicable to boat propeller, and the copper content is 55.0%~59.0%.
4.1.4 ZCuSn5Pb5Zn5, ZCuSn10Zn2, ZCuPb10Sn10, ZCuPb15Sn8 and
ZCuPb20Sn5 alloys are applicable to centrifugal casting and continuous
casting, and the phosphorus content is determined through negotiation of the supplier and the purchaser.
4.1.5 ZCuAl8Mn13Fe3Ni2 alloy is applicable to metal mold casting and
centrifugal casting, and the aluminum content is 6.8%~8.5%.
4.2 Mechanical properties
4.2.1 The room-temperature mechanical properties of as-cast alloy shall be in accordance with those specified in Table 3.
4.2.2 The mechanical properties of the alloy shall be determined with
separately cast test bar, test block, or the sample processed with attached test block. The shape and dimension of the casting test block are detailed in Annex A.
4.2.3 The mechanical property samples are taken from the casting body, and the sampling position shall be confirmed by the purchaser.
4.2.4 The short proportion sample with diameter of 14mm and gauge length of 70mm in its working part shall be adopted for the tensile sample. The short proportion sample with diameter of other dimensions in its working part is permissible if confirmed by the purchaser. The tensile strength of main body samples of sand mold casting shall not be less than 80% of the values
specified in Table 3, and the elongation shall not be less than 50% of the values specified in Table 3.
Table 3 -- Room-temperature Mechanical Properties of Casting Copper
and Copper Alloys
No. Alloy designation Casting method
Room-temperature mechanical property; not less than
Tensile strength
Rm/Mpa
Yield
strength
Rp0.2/Mpa
Elongation
A/%
Brinell
hardness
HBW
1 ZCu99 S 150 40 40 40
2 ZCuSn3Zn8Pb6Ni1 S 175 8 60 J 215 10 70
3 ZCuSn3Zn11Pb4 S, R 175 8 60 J 215 10 60
4 ZCuSn5Pb5Zn5 S, J, R 200 90 13 60*
The chemical compositions of alloys are inspected according to those
specified in GB/T 5121 (all parts) or YS/T 482. Other test methods are
allowable to be adopted only if the analysis precision is guaranteed. In case of any dispute exists in the analysis results, it shall be arbitrated according to GB/T 5121 (all parts).
5.2 Mechanical properties
5.2.1 The tensile test is conducted according to the requirements of GB/T 228.1.
5.2.2 The hardness test is conducted according to the requirements of GB/T 231.1.
6 Test Rules
6.1 Chemical compositions
6.1.1 Only the major elements of the alloy compositions are analyzed, and the analysis for impurity elements is determined through negotiation of the supplier and the purchaser.
6.1.2 If there is any unqualified element in the chemical compositions, resample is allowable for the analysis of the unqualified element. If the retest result is still unqualified, the chemical compositions of the alloys are regarded as unqualified.
6.2 Mechanical properties
6.2.1 Tensile test is conducted with the tensile sample (one) specified in 4.2.4. If the test result fails to meet those specified in Table 3, retest is conducted with another two samples, if one sample in the retest is unqualified, the mechanical properties of the alloy are regarded as unqualified.
6.2.2 If the property is unqualified due to the test or the defect on the sample, the test is invalid and resample shall be done for retest.
6.2.3 The hardness and tensile property are tested simultaneously, and the test methods are consistent.
6.2.4 The mechanical properties of the alloys with heat treatment
requirements are determined through negotiation of the supplier and the purchaser.
Annex B
(Informative)
The Main Features and Application Examples of Casting Copper
and Copper Alloys
The main features and application examples of casting copper and copper alloys are detailed in Table B.1.
Table B.1 -- The Main Features and Application Examples of Casting
Copper and Copper Alloys
No. Alloy designation Main feature Application example
1 ZCu99
It has good conductivity,
diathermancy and extensibility, good
corrosion resistance in atmosphere,
freshwater and sea water with slow flow
rate, a narrow solidification range and
good mobility, and is applicable to sand
mold, metal mold and continuous
castings, as well as argon arc welding.
It is served as the tuyere of blast
furnace and cinder notch, the tuyere
in blast furnace and cinder notch,
cooling plate, cooling wall; oxygen
lance nozzle for electric steelmaking,
electrode jaw and melting channel;
cooling piece for flash smelting
furnace in non-ferrous metal
metallurgy; shielding case for large
electrical machine, conductive
connecting piece; it may also be
adopted for drinking water pipes,
copper crucible, etc.
2 ZCuSn3Zn8Pb6Ni1
It's easy to be processed, and it has
good abrasion resistance, casting
properties, relatively good air tightness,
corrosion resistance, and it may be
served in a flowing sea water
environment.
It is used for parts working in
various liquid fuels, sea water,
freshwater and steam (???225???), or
valve and pipe fittings with pressure
???2.5MPa.
3 ZCuSn3Zn11Pb4
It has good casting properties,
corrosion resistance and it's easy to be
processed.
It is used in environment like
sea water, freshwater and steam, or
in pipe fittings with pressure
???2.5MPa.
4 ZCuSn5Pb5Zn5
It has good abrasion resistance and
corrosion resistance, relatively good
casting properties and air tightness, and
it's easy to be processed.
It is used for parts with good
wear-proof and corrosion-proof
performances and work under
relatively heavy load and at a
moderate sliding speed, such as
bearing bush, bushing, cylinder
sleeve, piston clutch, gland for
pumps, worm gear, etc.
5 ZCuSn10P1
It has good hardness and corrosion
resistance in atmosphere and
freshwater, relatively good abrasion
resistance, casting properties and
machinability; seizure phenomenon
doesn?€?t occur easily.
It can be used for wear-proof
parts working under heavy load
(below 20MPa) and at high sliding
speed, such as connecting rod,
bushing, bearing bush, gear, worm
gear, etc.
6 ZCuSn10Pb5
It has good corrosion resistance,
especially for dilute sulphuric acid,
hydrochloric acid and fatty acid.
It is used for structural material,
accessories with good corrosion
resistance and acid resistance, as
well as crusher bushing and bearing
bush.

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