GB/T 35840.1-2018Steels for plastic mould—Part 1: Non-alloy steels (English PDF)

Foreword

GB/T 35840, Steels for plastic mould, comprises 4 parts.

-- Part 1. Non-alloy steels;

-- Part 2. Pre-hardened steel bars;

-- Part 3. Corrosion-resistant steels;

-- Part 4. Pre-hardened steel plates (sheets).

This Part is Part 1 of GB/T 35840.

This Part was drafted in accordance with the rules given in GB/T 1.1-2009.

1 Scope

This Part of GB/T 35840 specifies the ordering content, dimensions, shape, weight, technical requirements, test methods, inspection rules, packaging, marking and quality certificate for non-alloy steels for plastic mould.

This Part applies to hot-rolled or forged non-alloy round steel, square steel, flat steel and steel plates (sheets) for the manufacture of plastic mould.

2 Normative References

The following referenced documents are indispensable for the application of this document. For dated references, only the edition dated applies to this document. For undated references, the latest edition of the referenced documents (including all amendments) applies to This Standard.

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 223.18, Methods for chemical analysis of iron, steel and alloy - The sodium thiosulfate separation iodimetric method for the determination of copper content

GB/T 223.23, Iron, steel and alloy - Determination of nickel content - The dimethylglyoxime spectrophotometric method

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 223.64, Iron, steel and alloy - Determination of manganese content - Flame atomic absorption spectrometric method

GB/T 223.72, Iron, steel and alloy - Determination of sulfur content - Gravimetric method

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 231.1, Metallic materials - Brinell hardness test - Part 1. Test method

GB/T 247, General rule of package mark and certification for steel plates (sheets) and strips

GB/T 709, Dimension, shape, weight and tolerances for hot rolled sheets and strips

GB/T 1299-2014, Tool and mould steels

GB/T 1979, Standard diagrams for macrostructure and defect of structural steels

GB/T 2101, General requirement of acceptance packaging, marking and certification for section steel

GB/T 2970-2016, Method for ultrasonic testing of thicker steel plates

GB/T 2975, Steel and steel products - Location and preparation of test pieces for mechanical testing

GB/T 4336, Carbon and low-alloy steel - Determination of multi-element contents - Spark discharge atomic emission spectrometric method (routine method)

GB/T 6402, Steel forgings - Method for ultrasonic testing

GB/T 8170, Rules of rounding off for numerical values and expression and judgement of limiting values

GB/T 10561-2005, Steel - Determination of content of nonmetallic inclusions - Micrographic method using standards diagrams

GB/T 17505, Steel and steel products - General technical delivery requirements

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 Infrared absorption method after combustion in an induction furnace (routine method)

3 Ordering content

The contract or order for the ordering of steels in accordance with this Part shall at least include the following content.

a) number of this Part;

b) product name;

c) designation (see 5.1); […]

6 Test methods

6.2 The chemical composition of steels is analyzed in accordance with GB/T 4336, GB/T 20123 or general test methods, but it shall be carried out during arbitration in accordance with GB/T 223.5, GB/T 223.11, GB/T 223.18, GB/T 223.23, GB/T 223.62, GB/T 223.64, GB/T 223.72 and GB/T 223.86.

7 Inspection rules