ISO 683-3-2022 PDF

Full title and description

ISO 683-3:2022 — Heat-treatable steels, alloy steels and free-cutting steels — Part 3: Case-hardening steels. This International Standard specifies technical delivery requirements for semi‑finished products, bars, wire rod, finished flat products and hammer/drop forgings manufactured from case‑hardening non‑alloy and alloy steels intended primarily for the manufacture of case‑hardened machine parts.

Abstract

The standard defines the technical delivery requirements for a range of case‑hardening steels including the permitted heat‑treatment conditions and surface conditions for different product forms. It lists the steels and their designation, specifies required mechanical and chemical properties, inspection documents and testing/inspection requirements (e.g., tensile, hardness, case depth where applicable), and provides tables of grades, delivery conditions and surface finishes to ensure conformity for materials used in case‑hardened components.

General information

• Status: Published / Current
• Publication date: 21 January 2022
• Publisher: International Organization for Standardization (ISO)
• ICS / categories: 77.140.10 (Heat‑treatable steels), 77.140.20 (Stainless steels)
• Edition / version: Edition 4 (2022)
• Number of pages: 36

Scope

ISO 683-3:2022 applies to the technical delivery requirements for case‑hardening non‑alloy and alloy steels supplied as semi‑finished products (hot‑formed), bars, wire rod, finished flat products and hammer or drop forgings. It covers the steels listed in the norm’s grade table, specifies applicable heat‑treatment and surface conditions for each product type, and is intended primarily for steels used to produce case‑hardened machine parts.

Key topics and requirements

• Designation and list of case‑hardening steel grades (table of grades and chemical composition limits).
• Technical delivery requirements for product forms: semi‑finished products, bars, wire rod, finished flat products, hammer/drop forgings.
• Specified heat‑treatment/delivery conditions for each product type (normalizing, annealing, quenching/tempering as applicable).
• Surface condition options and requirements for delivery (scale, pickled, machined, etc.).
• Required mechanical properties and tolerances (tensile strength, yield, elongation, hardness where specified).
• Inspection and testing provisions, including sample preparation, testing methods and acceptance criteria (hardness, case depth measurement where relevant).
• Marking, documentation and inspection certificates required on delivery (including reference to applicable inspection documents).
• Normative references and referenced methods for analysis and testing.

Typical use and users

Used by steel producers and mills, trading companies and distributors, heat‑treatment shops, forging and machining workshops, OEMs (automotive, gear and transmission manufacturers, heavy machinery), procurement/specification engineers, and conformity assessment bodies to specify, procure and verify case‑hardening steels for components such as gears, shafts, bushes and other parts requiring a hard case and tough core.

Related standards

ISO 683-3 is part of the ISO 683 series on heat‑treatable steels. Closely related documents commonly referenced include ISO 683-1 (general requirements for heat‑treatable steels), other parts of ISO 683 (different steel types), ISO 10474 (inspection documents for steel and steel products), and ISO/TR 9769 (methods of analysis). Regional/adopted equivalents (EN ISO 683-3 / national adoptions) are also frequently used in procurement and conformity contexts.

Keywords

case‑hardening steels, heat‑treatable steels, alloy steels, delivery requirements, heat treatment, surface condition, steel grades, mechanical properties, inspection, tensile, hardness, case depth, ISO 683 series

FAQ

Q: What is this standard?

A: ISO 683-3:2022 is the part of the ISO 683 series that sets out technical delivery requirements for case‑hardening non‑alloy and alloy steels supplied in various product forms, including their designated grades, heat‑treatment and surface conditions, and required inspections.

Q: What does it cover?

A: It covers the list of case‑hardening steel grades and their chemical/mechanical requirements, specified delivery and heat‑treatment conditions for semi‑finished products, bars, wire rod, finished flat products and forgings, surface condition requirements, testing and inspection rules, and documentation/marking required on delivery.

Q: Who typically uses it?

A: Steel manufacturers and suppliers, heat‑treatment and forging shops, component manufacturers (gears, shafts, bearings), procurement and specification engineers, testing and inspection bodies, and standards professionals involved in material selection and supply chain compliance.

Q: Is it current or superseded?

A: ISO 683-3:2022 is the current published edition (Edition 4, published January 2022), which supersedes the 2019 edition.

Q: Is it part of a series?

A: Yes — it is Part 3 of the ISO 683 series (Heat‑treatable steels, alloy steels and free‑cutting steels). The series contains multiple parts covering different steel families and related specifications.

Q: What are the key keywords?

A: Case‑hardening, heat‑treatment, heat‑treatable steels, alloy steels, steel grades, delivery requirements, surface condition, inspection, hardness, case depth.