SES N 3103 Structural Steel Additional Code

Developed by Suzuki Motor Corporation as part of metallic material standards, the “SES N 3103 Structural Steel Supplementary Code” standard is a supplementary material standard within Suzuki’s structural steel specification system. Its primary function is to provide additional coding rules, symbols, and classification details used in conjunction with primary structural steel standards (e.g., SES N 3101, SES N 3102 standards).

Here, the additional code is in contrast to the primary standards that define the following:

Chemical composition
Mechanical properties
Testing requirements

It focuses on how structural steel is defined and described, and generally includes the following:

Material coding systems
Symbol definitions for degrees or conditions
Additional definition rules used in drawings and databases
Compliance with relevant standards (e.g. coating codes, material lists)

The SES N 3103 standard primarily works in conjunction with the following standards:

SES N 3101 General structural steel specification
SES N 3102 Carbon steel material specification
Other SES N 3100 series standards: Special steel products (such as castings and sheets)

In practice:

SES N 3101 and SES N 3102 standards specify what the material should be.
The SES N 3103 standard focuses on how materials are coded and referenced.

SES N 3103 supplementary coding standards typically include the following:

Material symbols:
Abbreviations for steel types
Strength class indicators
Processing condition symbols (e.g., hot-rolled, normalized)
Coding rules:
How to generate a material identification code.
The position and meaning of each character.
Additional requirements:
Notes for specific applications
Exceptions or extensions to basic standards
Cross-references: Links to the following standards:
JIS structural steels (e.g., JIS G 3101 standard)
Coating and environmental standards (SES D and SES N 2400 standard series)

The Suzuki SES N 3103 standard is necessary because it solves a very practical problem: how to consistently define and communicate structural steel materials among different teams, suppliers, and countries. This standard is considered important for the following reasons:

It eliminates ambiguity in material identification: Structural steel can be defined in many ways (JIS, EN, ASTM, internal grades). Without a unified coding system,
The same material can be named in different ways.
Different materials may look similar on paper.

This standard provides a standardized coding format, so everyone refers to exactly the same material.

It ensures consistency in global supply chains: Suzuki works with suppliers worldwide. This standard ensures that a supplier in one country, a factory in another, and a design team in yet another, all interpret the material codes in the same way.
Supports digital systems: This standard is linked to modern automotive manufacturing data systems. This standard provides the following:
Correct material database entries
Reliable international material data system (IMDS) reporting.
Traceability from design, production and recycling.

Without a coding standard, digital systems would be inconsistent and prone to errors.

It prevents costly engineering errors: Incorrect or unclear material identification can lead to:
Incorrect steel selection.
Structural failure risks
Rework or recalls

This standard reduces these risks by making material definitions clear and uniform.

It combines multiple standards: Suzuki uses various standards together:
Structural characteristics (SES N 3101 standard)
Carbon steel properties (SES N 3102 standard)
External standards (such as JIS, EN)

The SES N 3103 standard acts as a bridge, ensuring that all these standards are structured in the following way:

Properly referenced
Explicitly coded
It increases production and documentation efficiency: With standardized codes,
Drawings are easier to read.
The material lists are consistent.
Production errors are minimized.

Consequently, the SES N 3103 standard is essential for Suzuki's global operations to ensure clarity, consistency, traceability, and safety in the identification and use of structural steel materials. This standard is a coding and identification standard that performs the following functions:

It complements the basic structural steel properties.
It defines how materials will be identified, labeled, and delivered.
This ensures consistency across Suzuki's global engineering and supplier network.

For many years, our organization, with its competent and experienced team, has been understanding the needs of its clients, providing the advanced testing services they require, and assisting them in the establishment, implementation, and improvement of management systems. Within this framework, we also provide testing services compliant with the SES N 3103 standard.