GB/T 35840.3-2018Steels for plastic mould—Part 3: Corrosion resistant steels (English PDF)

1 Scope

This Part of GB/T 35840 specifies the content of ordering, dimension, appearance, weight, technical requirements, test methods, inspection rules, packaging, marking and certification of corrosion resistant steels for plastic mould.

This Part is applicable to corrosion resistant round steel, square steel and flat steel (hereinafter referred to as steels) that are used for the manufacture of plastic moulds through hot rolling, forging and machining delivery.

2 Normative References

The following documents are indispensable to the application of this Standard. In terms of references with a specified date, only versions with a specified date are applicable to this Standard. The latest version (including all the modifications) of references without a specified date is also applicable to this Standard.

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 223.5 Steel and Iron - Determination of Acid-soluble Silicon and Total Silicon Content - Reduced Molybdosilicate Spectrophotometric Method

GB/T 223.11 Iron, Steel and Alloy - Determination of Chromium Content - Visual Titration or Potentiometric Titration Method

GB/T 223.13 Methods for Chemical Analysis of Iron, Steel and Alloy - The Ammonium Ferrous Sulfate Titration Method for the Determination of Vanadium Content

GB/T 223.14 Methods for Chemical Analysis of Iron, Steel and Alloy - The N-benzoy-N-phenylhydroxylamine Extraction Photometric Method for the Determination of Vanadium Content

GB/T 223.18 Methods for Chemical Analysis of Iron, Steel and Alloy - The Sodium Thiosulfate Separation Iodometric Method for the Determination of Copper Content

GB/T 223.19 Methods for Chemical Analysis of Iron, Steel and Alloy - The Neocuproine - Chloroform Extraction Photometric Method for the Determination of Copper Content

Perchloric Acid Dehydration Gravimetric Method for the Determination of Silicon Content

GB/T 223.61 Methods for Chemical Analysis of Iron, Steel and Alloy - The Ammonium Phosphomolybdate Volumetric Method for the Determination of Phosphorus Content

GB/T 223.62 Methods for Chemical Analysis of Iron, Steel and Alloy - The Butyl Acetate Extraction Photometric Method for the Determination of Phosphorus Content

GB/T 223.63 Methods for Chemical Analysis of Iron, Steel and Alloy - The Sodium (potassium) Periodate Photometric Method for the Determination of Manganese Content

GB/T 223.64 Iron, Steel and Alloy - Determination of Manganese Content - Flame Atomic Absorption Spectrometric Method

GB/T 223.67 Iron, Steel and Alloy - Determination of Sulfur Content - Methylene Blue Spectrophotometric Method

GB/T 223.68 Methods for Chemical Analysis of Iron, Steel and Alloy - The Potassium Iodate Titration Method after Combustion in the Pipe Furnace for the Determination of Sulfur Content

GB/T 223.69 Iron, Steel and Alloy - Determination of Carbon Contents - Gas-volumetric Method after Combustion in the Pipe Furnace

GB/T 223.71 Methods for Chemical Analysis of Iron, Steel and Alloy - The Gravimetric Method after Combustion in the Pipe Furnace for the Determination of Carbon Content

GB/T 223.72 Iron, Steel and Alloy - Determination of Sulfur Content - Gravimetric Method

GB/T 223.76 Methods for Chemical Analysis of Iron, Steel and Alloy - The Flame Atomic Absorption Spectrometric Method for the Determination of Vanadium Content

GB/T 223.82 Steel and Iron - Determination of Hydrogen Content - Inert Gas Impulse Fusion Heat Conductivity 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

3 Classification

In accordance with methods of application and processing, steels can be divided into 2 types as follows.

a) Steel for pressure work UP

1) Hot pressure processing UHP

2) Cold pressure processing UCP

b) Steel for cut work UC

Methods of steel application and processing shall be indicated in the contract.

4 Content of Ordering

Contract or order of steels that are purchased in accordance with this Part shall include the following content.

a) Serial number of this Part;

b) Product name;

c) Nameplate (refer to 6.1);

d) Smelting method (refer to 6.2);

e) Product specification;

f) Dimension, appearance and allowable deviation (refer to Chapter 5);

g) Status of delivery (refer to 6.3);

h) Weight (or quantity);

i) Special requirements.

5 Dimension, Appearance and Weight

5.1 Dimension, appearance and allowable deviation of hot-rolled round steel and square steel shall comply with the stipulation in 5.1.1 in GB/T 1299-2014.

5.2 Dimension, appearance and allowable deviation of hot-rolled flat steel shall comply with the stipulation in 5.1.2 in GB/T 1299-2014. […]

8 Inspection Rules

9 Packaging, Marking and Certification

Packaging, marking and certification of steel shall comply with the stipulations in GB/T 2101. […]