GB/T 37607-2019 English PDF (GBT37607-2019)

This Standard specifies the designation, dimensions, shape, technical requirement, test method, inspection rule, packaging, marking and quality certificate of corrosion-resistant alloy wire rod and wire. This Standard is applicable to corrosion-resistant alloy wire rods with nominal diameters of 4.5 mm ~ 18.0 mm and corrosion-resistant cold drawn (pull) wires with nominal diameters of 0.10 mm ~ 16.0 mm (hereinafter referred to as alloy materials). Other specifications may also be referred to.

GB/T 37607-2019
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.140.99
H 59
Corrosion-resistant alloy wire rod and wire
ISSUED ON: JUNE 04, 2019
IMPLEMENTED ON: MAY 01, 2020
Issued by: State Administration for Market Regulation;
Standardization Administration of the People's Republic of
China.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Ordering content ... 7
4 Dimensions, shape, diameter and weight ... 7
5 Technical requirements ... 9
6 Test method ... 15
7 Test rules ... 16
8 Packaging, marking and quality certificate ... 16
Appendix A (Informative) Comparison of domestic-foreign corrosion resistant alloy designations ... 18
Corrosion-resistant alloy wire rod and wire
1 Scope
This Standard specifies the designation, dimensions, shape, technical
requirement, test method, inspection rule, packaging, marking and quality certificate of corrosion-resistant alloy wire rod and wire.
This Standard is applicable to corrosion-resistant alloy wire rods with nominal diameters of 4.5 mm ~ 18.0 mm and corrosion-resistant cold drawn (pull) wires with nominal diameters of 0.10 mm ~ 16.0 mm (hereinafter referred to as alloy materials). Other specifications may also be referred to.
2 Normative references
The following documents are indispensable for the application of this document. For dated references, only the dated version applies to this document. For undated references, the latest edition (including all amendments) applies to this document.
GB/T 223.5, Steel and iron - Determination of acid-soluble silicon and total silicon content. Reduced molybdosilicate spectrophotometric method
GB/T 223.8, Methods for chemical analysis of iron, steel and alloy. The sodium fluoride separation. EDTA titration method for the determination of aluminium content
GB/T 223.9, Iron, steel and alloy. Determination of aluminium content.
Chrome azurol S photometric method
GB/T 223.11, Iron, steel and alloy. Determination of chromium content. Visual titration or potentiometric titration method
GB/T 223.14, Methods for chemical analysis of iron, steel and alloy. The N- benzoyl-N-phenylhydroxylamine extraction photometric method for the
determination of vanadium content
GB/T 223.17, Methods for chemical analysis of iron, steel and alloy. The diantipyrylmethane photometric method for the determination of titanium content
GB/T 223.18, Methods for chemical analysis of iron steel and alloy. The sodium thiosulfate separation iodometric method for the determination of GB/T 223.73, Iron, steel and alloy. Determination of iron contents. Titanium trichloride-potassium dichromate titration method
GB/T 223.75, Iron, steel and alloy. Determination of boron content. Methanol distillation-curcumin photometric method
GB/T 223.79, Iron and steel. Determination of multi-element contents. X-ray fluorescence spectrometry (Routine method)
GB/T 223.85, Steel and iron. Determination of sulfur content. Infrared
absorption method after combustion in an induction furnace
GB/T 223.86, Steel and iron. Determination of total carbon content. Infrared absorption method after combustion in an induction furnace
GB/T 226, Test method for macrostructure and defect of steel by etching GB/T 228.1, Metallic materials. Tensile testing. Part 1: Method of test at room temperature
GB/T 228.2, Metallic materials. Tensile testing. Part 2: Method of test at elevated temperature
GB/T 239.2, Metallic materials. Wire. Part 2: Reverse torsion test
GB/T 2039, Metallic materials. Uniaxial creep testing method in tension GB/T 2103-2008, General requirements for acceptance, packing, marking
and quality certification of steel wire
GB/T 2975, Steel and steel products. Location and preparation of samples and test pieces for mechanical testing
GB/T 4162, Forged and rolled steel bars. Method for ultrasonic testing
GB/T 6394, Determination of estimating the average grain size of metal
GB/T 11170, Stainless steel. Determination of multi-element contents. Spark discharge atomic emission spectrometric method (Routine method)
GB/T 15007, Grades of corrosion-resistant alloy
GB/T 15260, Corrosion of metals and alloys. Test methods for intergranular corrosion of nickel alloys
GB/T 20066, Steel and iron. Sampling and preparation of samples for the determination of chemical composition
GB/T 20123, Steel and iron. Determination of total carbon and sulfur content 5.4.1 The wire rod shall be tested for hardness or tensile strength. The specific requirements shall be determined by both parties.
5.4.2 The mechanical properties of the cold drawn (pull) wire that is treated by the heat treatment system which is recommended in Table 6 shall comply with the requirements of Table 6.
5.5 Surface quality
5.5.1 The surface of the wire rod shall be smooth, free from cracks, scars, flashing edges, heavy skin, tensile marks, burrs, scratches; pits and scratches that do not exceed half of the dimensional tolerances are allowed to exist. 5.5.2 The cold drawn surface is not allowed to have defects that are harmful to use such as scabs, folds, cracks, burrs, pits, scratches and scales; however, it is allowed to have pits and scratches whose depth do not exceed half the dimensional tolerance.
5.6 Special requirements.
According to the requirements of the buyer, if it is negotiated between the supplier and the buyer, and specified in the contract, the alloy materials of the following special requirements can be supplied:
a) test low-magnification organization;
b) ultrasonic testing;
c) test the grain size;
d) test intergranular corrosion;
e) test high-temperature stretching;
f) test process performance such as torsion;
g) others.
air cooling
11 H06002 NS3312 -
Solid solution: keep warm at
1060°C ~ 1170°C for 0.1 h ~ 0.5 h;
air cooling
≥ 660 ≥ 240 ≥ 35
12 H07750 NS4102 -
Solid solution: keep warm at (982 ±
14)°C for 0.5 h, air or water cooling
Aging: keep warm at (732±14)°C
for 8 h, cool to (621±14)°C with
furnace and keep warm for 18 h; air
cooling
≥ 1 170 ≥ 790 ≥ 18
13 H07718 NS4301 -
Solid solution: keep warm at 924°C
~ 1010°C for 0.5 h; air cooling or
water cooling
Aging: keep warm at (718±10)°C
for 8 h, cool to (621±10)°C with
furnace and keep warm for 18 h; air
or water cooling
≥ 1 275 ≥ 1 034 ≥ 12
14 H02200 NS5200 -
Solid solution: keep warm at 870°C
~ 1040°C for 5 min ~ 10 min; air
cooling
380 ~ 580 105 ~ 345 40 ~ 50
Cold drawing 860 ~ 1 000 725 ~930 2 ~ 15
15 H02201 NS5201 -
Solid solution: keep warm at 870°C
~ 1040°C for 5 min ~ 10 min; air
cooling
345 ~ 415 70 ~ 170 40 ~ 60
16 H04400 NS6400
Solid solution: keep warm at 871°C
~ 982°C for 2 min ~ 10 min; air
cooling
483 ~ 586 - -
≤ 0.71
Cold drawing
≥ 1 138 - -
> 0.71 ~ 1.45 ≥ 1 103 - -
> 1.45 ~ 2.90 ≥ 1 104 - -
> 2.90 ~ 7.92 ≥ 965 - -
> 7.92 ~ 9.53 ≥ 931 - -
> 9.53 ~ 12.7 ≥ 896 - -
> 12.7 ~ 14.3 ≥ 827 - -
17 H05500 NS6500
≤ 2.9 Cold drawing + aging: keep warm
at (595 ± 8)°C for 8 h ~ 16 h; cool
at a rate of 10°C/h ~ 15°C/h with
the furnace to 480°C; air cooling
≥ 1 240 - -
> 2.9 ~ 9.52 ≥ 1 170 - -
> 9.52 ~ 14.3 ≥ 1 105 - -
≤ 16 ≥ 1 107 - -
≤ 1.45
Cold drawing
≥ 1 140 - -
> 1.45 ~ 2.90 ≥ 1 070 - -
> 2.9 ~ 5.82 ≥ 1 035 - -
> 5.82 ~ 7.92 ≥ 1 000 - -
> 7.92 ~ 9.52 ≥ 930 - -
diameter by volume) meets the accuracy
requirements
7 Test rules
7.1 Inspection and acceptance
The inspection and acceptance of alloy materials shall be carried out by the supplier's quality and technical supervision department. The buyer is entitled to inspect and accept the alloy material in accordance with the provisions of this Standard.
7.2 Batch rules
Alloy materials shall be submitted for inspection and acceptance in batches. Each batch shall consist of alloy materials of the same designation, the same heat number, the same specification, the same delivery state and the same heat treatment number.
7.3 Sampling portion and sampling quantity
The sampling portion and sampling quantity of the alloy materials shall comply with the requirements of Table 7.
7.4 Re-inspection and determination rules
7.4.1 When the result of chemical composition analysis is unqualified, it is allowed to re-sample to analyze the unqualified elements; if the re-inspection result is still unqualified, the furnace is judged as unqualified.
7.4.2 When the mechanical properties, hardness, grain size and torsion test results are unqualified, it is allowed to take double-quantity samples from the batch of alloy materials (including the first-time unqualified alloy materials) for re-inspection. If the result of the retest is still unqualified, the batch is judged as unqualified.
7.4.3 When the dimensions and shape are unqualified, the single disc (volume) is judged as unqualified.
7.4.4 When the surface quality is defective, it is allowed to be cut and re- distributed.
8 Packaging, marking and quality certificate
8.1 The packaging and marking of alloy materials shall comply with the
provisions of Class-C or Class-E of GB/T 2103-2008; other types of packaging