GB/T 17616-2025 English PDF

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 17616-2025	RFQ	ASK	3 days	Iron and steel coding system for irons, steels and alloys	Valid
GB/T 17616-2013	979	Add to Cart	7 days	Unified numbering system for designation of iron, steel and alloy	Valid
GB/T 17616-1998	399	Add to Cart	3 days	Unified numbering system for designations of iron, steel and alloy	Obsolete

Basic data

Standard ID: GB/T 17616-2025 (GB/T17616-2025)
Description (Translated English): Iron and steel coding system for irons, steels and alloys
Sector / Industry: National Standard (Recommended)
Date of Implementation: 2026-03-01
Older Standard (superseded by this standard): GB/T 17616-2013

GB/T 17616-2013: Unified numbering system for designation of iron, steel and alloy

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Unified numbering system for designation of iron, steel and alloy ICS 77.080.01 H40 National Standards of People's Republic of China Replacing GB/T 17616-1998 Steel and alloy unified numbering system Unifiednumberingsystemfordesignationofiron, steelandaloy Issued on. 2013-12-17 2014-09-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Table of Contents

Introduction Ⅲ 1 Scope 1 2 Normative references 1 3 1 General Provisions 4 structure type 1 5 classification and grouping 2 6 coding rule 2 6.1 alloy steel 2 6.2 bearing steel 3 6.3 cast iron, cast steel and cast alloy 3 6.4 Electrical steel and iron 3 6.5 ferroalloys and pig iron 3 6.6 corrosion resistant alloys and superalloys 3 Metallic Functional Materials 6.7 3 6.8 low-alloy steel 3 6.9 Miscellaneous material 3 6.10 powder and powder metallurgy materials 4 6.11 quenched metals and alloys 4 6.12 stainless steel and heat-resistant steel 4 6.13 Tool Steel 4 6.14 non-alloy steel 4 6.15 Welding Steel and Alloy 4 7 Preparation and Management 4 Table 1 Type of steel and alloy numerals 2 and Unity Table 2 alloy structural steel unified digital code representation 5 Table 3 bearing steel unified digital code representation 9 Table 4 iron unified digital code representation 10 5 steel and cast alloy unified digital code representation Table 11 Table 6 Electrical steel and iron unified digital code representation 15 7 ferroalloys and pig iron unified digital code representation Table 16 Table 8 corrosion resistant alloys and superalloys unified digital code representation 21 Table 9 Metallic Functional Materials unified digital code representation 22 Table 10 low-alloy steel unified digital code representation 24 Table 11 Miscellaneous material unified digital code representation 25 12 PM Materials unified digital code representation Table 28 Table 13 quenched metal and alloy unified digital code representation 32 14 stainless steel and heat-resistant steel unified digital code representation Table 33 Table 15 Tool Steel unified digital code representation 34 Table 16 Non-alloy steel unified digital code representation 36 Table 17 Welding Steel and Alloy unified digital code representation 38

Foreword

This standard was drafted in accordance with GB/T 1.1-2009 given rules. This standard replaces GB/T 17616-1998 "steel and alloy unified numbering system." This standard compared with GB/T 17616-1998 standards, the main changes are as follows. --- Remove the "Definitions" chapter (see 3, 1998); --- Added "there should be no gap between the arrangement of letters and numbers" provisions (see 3.2); --- The "precision alloys and other special physical properties of materials" to "Metallic Functional Materials", the "tool steel" to "mold Steel "(see Table 1); --- Added "encoding rules" to modify the fine classification of some products and (or) their products mainly consist grades Unified numbering (see Chapter 6, 1998 edition Tables 2 to 16). The standard proposed by China Iron and Steel Association. This standard by the National Steel Standardization Technical Committee (SAC/TC183) centralized. This standard was drafted. Metallurgical Industry Information Standards Institute, Shougang Corporation. The main drafters of this standard. Wear strong, Luan Yan, Shi Li, Wang Liping. This standard supersedes the previous editions are. --- GB/T 17616-1998. Steel and alloy unified numbering system

1 Scope

This standard specifies the grades of steel and alloy products unified digital code (abbreviated "ISC" code) of the General Regulations, structure type, classification and coding Group, coding rules, preparation and management. This standard applies to the preparation of grades of steel and alloy products Unified numbering. Where the inclusion of national standards and industry-standard steel and alloy Products should also be included in the product trademark and Unified numbering, cross-referencing, two representations are valid.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein Member. For undated references, the latest edition (including any amendments) applies to this document. GB/T 221 grades of steel products representation GB/T 4309 metallurgy and material classification grades representation GB/T 5612 cast iron grades representation GB/T 5613 steel grades representation GB/T 7738 ferroalloy product grades that way GB/T 13304.1 steel classification - Part 1. Classification by chemical composition GB/T 13304.2 steel classification - Part 2. Press the main quality classes and main property or application characteristics GB/T 14984.1 ferroalloy Terminology - Part 1. Materials GB/T 14992 between high temperature metal alloys and compounds Classification and designation of high-temperature materials GB/T 15007 corrosion resistant alloy grades GB/T 15018 Precision Alloy GB/T 15019 Classification and designation quenched metal GB/T 15574 Steel Products

3 General

3.1 standard product classifications, definitions and product brands names should comply with the relevant provisions of the standards set out in Chapter 2. 3.2 unified digital code by a fixed six symbols, uppercase first left for Latin prefix (generally do not use "I" and "O" Letters), there should be no contact between the rear Five-digit Arabic numerals, letters and numbers gap arrangement. 3.3 Each unified digital code applies only to one product grade; on the contrary, each one corresponding to a Grade only numerals. when After Grade canceled, under normal circumstances, the unified digital code corresponding to the original is no longer assigned to another product brands.

4 structure type

Unified digital code in the form of the following structure. ......

Image     

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