IS 18809 2024 – Specification for Wear and Abrasion Resistant Steel Sheet and Plate

Published By: Bureau of Indian Standards (BIS)
Effective Date: August 2024

Overview

IS 18809: 2024 defines the specifications for wear and abrasion resistant steel sheets and plates. This standard ensures that these materials meet stringent performance criteria essential for applications in challenging environments, including construction, mining, and transportation.

Key Features of IS 18809 2024 Wear and Abrasion Resistant Steel

Material Types: The standard specifies products in Quenched (Q) and Quenched and Tempered (Q and T) conditions.

Application Scope: Ideal for heavy-duty applications where durability and longevity are critical.

Key Terminology in IS 18809 2024 Standard

Quenching: A heat treatment process that significantly increases steel hardness by rapidly cooling it from a high temperature.

Tempering in IS 18809 2024 Steel Specification:

A process of reheating hardened steel to achieve specific mechanical properties.

Wear and Abrasion Resistant Steel in IS 18809 2024:

High-hardness steel designed to resist surface wear and abrasion caused by friction.

Grades and Hardness Levels in IS 18809 2024 Steel Sheets

IS 18809 classifies wear and abrasion resistant steel into various grades based on hardness measured in Brinell Hardness Number (BHN).

Grade	Hardness (BHN)	Designation
ISAR 400	360 to 430	IS AR 400
ISAR 450	410 to 490	IS AR 450
ISAR 500	450 to 550	IS AR 500
ISAR 550	500 to 580	IS AR 550
ISAR 600	550 to 650	IS AR 600

 

Chemical Composition in IS 18809 2024 Steel Standard

The chemical composition for each grade ensures optimal performance, with maximum permissible limits for key elements.

Grade	C (%)	Mn (%)	Si (%)	P (%)	S (%)	Cr (%)	Mo (%)	Ni (%)	B (%)
ISAR 400	≤ 0.30	≤ 1.60	≤ 0.70	≤ 0.025	≤ 0.010	≤ 1.80	≤ 0.50	≤ 1.20	0.0050
ISAR 450	≤ 0.32	≤ 1.60	≤ 0.70	≤ 0.025	≤ 0.010	≤ 1.80	≤ 0.50	≤ 1.20	0.0050
ISAR 500	≤ 0.35	≤ 1.80	≤ 0.80	≤ 0.025	≤ 0.010	≤ 2.00	≤ 0.60	≤ 1.50	0.0050
ISAR 550	≤ 0.37	≤ 1.80	≤ 0.80	≤ 0.025	≤ 0.010	≤ 2.00	≤ 0.60	≤ 1.50	0.0050
ISAR 600	≤ 0.47	≤ 1.80	≤ 0.80	≤ 0.025	≤ 0.010	≤ 2.00	≤ 0.60	≤ 1.50	0.0050

 

Mechanical Properties of IS 18809 2024 Steel Sheets

The standard outlines essential mechanical properties to be met by these steel grades.

Hardness

Grade	Hardness (BHN)
ISAR 400	360 to 430
ISAR 450	410 to 490
ISAR 500	450 to 550
ISAR 550	500 to 580
ISAR 600	550 to 650

 

Tensile Strength

Grade	Yield Strength (MPa)	Tensile Strength (MPa)	Elongation (%)
ISAR 400	900	1150	8.0
ISAR 450	1000	1300	8.0
ISAR 500	1200	1400	6.0

 

Charpy Impact Values

Grade	Test Temperature	Value (Joules)
ISAR 400	-20°C	27
ISAR 400	-40°C	20
ISAR 450	-20°C	27
ISAR 450	-40°C	15

Delivery and Marking

• The steel sheets and plates may be supplied in a heat-treated condition, marked clearly with:
• Manufacturer’s name
• Grade designation
• Heat number or lot number for traceability

 

Ordering Information

When placing an order for wear and abrasion resistant steel, please provide the following details:

• Grade
• Size
• Mass of the material
• Total order quantity
• Specific marking instructions (if any)
• Any restricted chemistry or properties for special purposes
• Dimension tolerances (if applicable)
• Supply condition (e.g., edge condition, surface treatment requirements)

 

Global Brands Compliant with IS 18809 2024 Steel Standard

In the global market for wear and abrasion resistant steel, several brands are recognized for their quality and performance, significantly influencing the industry landscape in India. These include:

• Hardox (by SSAB)
• Abrex (by Nippon Steel)
• EV (by JFE Steel)
• Rockstar (by AMNS)
• Rockhard (by JSPL)

 

All these brands are part of the same league, providing high-quality materials that meet rigorous performance standards. Their presence in the Indian market ensures that both manufacturers and end consumers can identify reliable products through BIS certification. The adoption of IS 18809: 2024 will support the Make in India initiative, fostering growth and enhancing trust in domestically produced steel products while aligning with global best practices.