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ISO/TR 20174:2020 - A Useful Guide for Welding Materials

Introduction

If you are involved in welding activities, you may have heard of ISO/TR 20174:2020, a technical report that provides a Japanese grouping system for materials for welding purposes, classified in accordance with the grouping system of ISO/TR 15608. This document covers various types of materials, such as steels, aluminium and aluminium alloys, titanium and titanium alloys, and cast irons. It lists the types of materials in each group and subgroup, with their corresponding Japanese standards and chemical compositions.

But why is But why is ISO/TR 20174:2020 important for welding purposes and other applications? And how can you access it online for free? In this article, we will answer these questions and provide you with some useful information on this document.

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What is ISO/TR 20174:2020 and what does it cover?

ISO/TR 20174:2020 is a technical report that provides a Japanese grouping system for materials for welding purposes, classified in accordance with the grouping system of ISO/TR 15608. ISO/TR 15608 is a general standard that provides a grouping system for materials for welding purposes, based on their chemical composition and mechanical properties. The grouping system of ISO/TR 15608 can be applied to various types of materials, such as steels, nickel and nickel alloys, copper and copper alloys, etc. However, ISO/TR 20174:2020 is a specific technical report that applies the grouping system of ISO/TR 15608 to Japanese materials, based on their Japanese standards and chemical compositions.

ISO/TR 20174:2020 covers the following types of materials:

• Steels: This includes carbon steels, low-alloy steels, high-alloy steels, stainless steels, heat-resisting steels, etc.

• Aluminium and aluminium alloys: This includes pure aluminium, aluminium-magnesium alloys, aluminium-magnesium-silicon alloys, aluminium-zinc-magnesium alloys, etc.

• Titanium and titanium alloys: This includes unalloyed titanium, titanium-aluminium-vanadium alloys, titanium-aluminium-molybdenum-vanadium alloys, etc.

• Cast irons: This includes grey cast irons, malleable cast irons, ductile cast irons, etc.

ISO/TR 20174:2020 lists the types of materials in each group and subgroup, with their corresponding Japanese standards and chemical compositions. For example, the following table shows the types of materials in group 1 (steels) and subgroup 1.1 (carbon steels) of ISO/TR 20174:2020:

Type of material

Japanese standard

Chemical composition (%)

C-Mn steel

JIS G3101 SS330

C 0.18; Mn 1.35; P 0.05; S 0.05; Si 0.30; N 0.012; Cu 0.20; Ni 0.20; Cr 0.20; Mo 0.08; V 0.10; Nb 0.05; Ti 0.05; Al 0.02

C-Mn steel

JIS G3101 SS400

C 0.22; Mn 1.35; P 0.05; S 0.05; Si 0.30; N 0.012; Cu 0.20; Ni 0.20; Cr 0.20; Mo 0.08; V 0.10; Nb 0.05; Ti 0.05; Al 0.02

C-Mn steel

JIS G3106 SM400A/B/C

C 0.23/0.22/0.22; Mn 2.50/2.50/2.50; P 0.035/0.035/0.035; S 0.035/0.035/0.035; Si Si 0.35/0.35/0.35; N 0.012/0.012/0.012; Cu 0.30/0.30/0.30; Ni 0.25/0.25/0.25; Cr 0.30/0.30/0.30; Mo 0.08/0.08/0.08; V 0.05/0.05/0.05; Nb 0.05/0.05/0.05; Ti 0.05/0.05/0.05; Al 0.02/0.02/0.02

C-Mn steel

JIS G3106 SM490A/B/C

C 0.20/0.19/0.19; Mn 1.65/1.65/1.65; P 0.035/0.035/0.035; S 0.035/0.035/0.035; Si Si 0.55/0.55/0.55; N 0.012/0.012/0.012; Cu 0.30/0.30/0.30; Ni 0.25/0.25/0.25; Cr 0.30/0.30/0.30; Mo 0.08/0.08/0.08; V 0.05/0.05/0.05; Nb 0.05/0.05/0.05; Ti 0.05/0.05/0.05; Al 0.02/0.02/0.02

C-Mn steel

JIS G3106 SM520B/C

C 0.20/0.19; Mn 1.60/1.60; P 0.035/0.035; S 0.035/0.035; Si Si 0.55/0.55; N 0.012/0.012; Cu 0.30/0.30; Ni 0.25/0.25; Cr 0.30/0.30; Mo 0.08/0.08; V 0.05/0.05; Nb 0.05/0.05; Ti 0.05/0.05; Al 0.02/0.02

C-Mn steel

JIS G3106 SM570

C 0.19; Mn 1.60; P 0.035; S 0.035; Si Si 0.55; N 0.012; Cu 0.30; Ni 0.25; Cr 0.30; Mo 0.08; V 0.05; Nb 0.05; Ti 0.05; Al 0.02

Similarly, the other groups and subgroups of materials have their own tables in ISO/TR 20174:2020, which you can refer to for more details.

Why is it important for welding purposes and other applications?

The grouping system of ISO/TR 20174:2020 is important for welding purposes and other applications, because it helps to reduce the number of welding procedures to be qualified for production applications, by allowing multiple different grades to be covered by a single test weld. For example, if you want to weld two different grades of carbon steels that belong to the same subgroup (e.g., JIS G3101 SS400 and JIS G3106 SM400A), you can use the same welding procedure and filler material, without having to qualify a separate procedure for each grade.

The grouping system of ISO/TR 20174:2020 also helps to ensure compatibility and quality of welded joints, by selecting appropriate filler materials and welding parameters based on the material groups. For example, if you want to weld a carbon steel (group 1) with a stainless steel (group 8), you can use a filler material that belongs to group 23 (austenitic-ferritic stainless steels), which has a similar weldability and mechanical properties as the base materials.

The grouping system of ISO/TR 20174:2020 can also be used for other purposes, such as heat treatment, forming, and non-destructive testing, where similar weldability or mechanical properties are required. For example, if you want to heat treat a welded joint made of two different grades of aluminium alloys that belong to the same subgroup (e.g., JIS H4000 A5052 and JIS H4000 A5083), you can use the same heat treatment parameters, without having to adjust them for each grade.

How can you access it online for free?

If you want to access ISO/TR 20174:2020 online, you have several options:

• You can buy the official PDF version from the ISO website or other authorized distributors. This will ensure that you get the most updated and accurate version of the document, with all the tables and figures included. However, this option may be costly, depending on the price and currency.

• You can also preview the document online from the ISO website or other sources, such as ANSI or TWI. This will allow you to see the main content and structure of the document, but not the full details or annexes. This option may be useful if you just want to get an overview or a quick reference of the document.

• You can also download a free PDF version from some websites that offer free ISO standards downloads, such as [PDF Drive] or [Standards Online]. This will enable you to get the full document without paying anything, but be aware of the potential risks of malware or outdated versions. You should always check the source and validity of the document before using it.

Conclusion

In conclusion, ISO/TR 20174:2020 is a useful guide for welding materials, especially for Japanese materials. It provides a grouping system that simplifies the qualification and selection of welding procedures and filler materials. It can be accessed online in various ways, but caution is advised when using free downloads.

FAQs

• Q: What is the difference between ISO/TR 20174:2020 and ISO/TR 15608?

• A: ISO/TR 15608 is a general standard that provides a grouping system for materials for welding purposes, based on their chemical composition and mechanical properties. ISO/TR 20174:2020 is a specific technical report that applies the grouping system of ISO/TR 15608 to Japanese materials, based on their Japanese standards and chemical compositions.

• Q: What are the benefits of using the grouping system of ISO/TR 20174:2020?

• A: The benefits are:

• It reduces the number of welding procedures to be qualified, by allowing multiple different grades to be covered by a single test weld

• It ensures compatibility and quality of welded joints, by selecting appropriate filler materials and welding parameters based on the material groups

• It can also be used for other purposes, such as heat treatment, forming, and non-destructive testing, where similar weldability or mechanical properties are required

• Q: How can I find out which material group or subgroup my material belongs to?

• A: You can refer to the tables in ISO/TR 20174:2020, which list the types of materials in each group and subgroup, with their corresponding Japanese standards and chemical compositions. You can also use online tools or databases that provide information on material properties and standards.

• Q: How can I buy or preview ISO/TR 20174:2020 online?

• A: You can buy the official PDF version from the ISO website or other authorized distributors. You can also preview the document online from the ISO website or other sources, such as ANSI or TWI.

• Q: How can I download ISO/TR 20174:2020 for free online?

• A: You can download a free PDF version from some websites that offer free ISO standards downloads, such as [PDF Drive] or [Standards Online]. This will enable you to get the full document without paying anything, but be aware of the potential risks of malware or outdated versions. You should always check the source and validity of the document before using it.

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