ISO 642:1999

Name: ISO 642:1999 — Steel — Hardenability test by end quenching (Jominy test)
SKU: ISO 642:1999
Price: 25 EUR
Availability: InStock

Steel — Hardenability test by end quenching (Jominy test)

Название (английский):

ISO 642:1999

Steel — Hardenability test by end quenching (Jominy test)

Статус документа:: Отменён
Формат:: Электронный (PDF)
Количество страниц:: 18
Дата публикации:: 9 сентября 1999 г.
Издание:: ISO IS 642 edition 2 version 1
ICS:: 77.040.99

Тип поставки:

Full version25 €Ask AI2 €Read online 24h10 €Read online 72h15 €

Язык документа:

ruen

Срок поставки:1 рабочий день

Цена:25 €

Описание (английский):

La présente Norme internationale spécifie la méthode de détermination de la trempabilité de l'acier par trempe en bout (essai Jominy), à l'aide d'une éprouvette de 25 mm de diamètre et 100 mm de longueur.NOTE Par accord et pour un domaine donné d'application, l'essai décrit dans la présente Norme internationale peut être remplacé par le calcul de la courbe Jominy conformément à un modèle mathématique accepté (voir annexe C). En cas de litige, l'essai doit être effectué.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

ISO 642:1999 - "Steel - Hardenability test by end quenching (Jominy test)" is an International Organization for Standardization (ISO) method for determining the hardenability of steel using the Jominy end‑quench procedure. The standard defines test-piece geometry, heating and quenching conditions, hardness measurement locations, result expression (J‑codes), and reporting requirements. It also includes informative annexes on specification, additional reporting details and calculation of hardenability.

Key topics and technical requirements

Test piece: cylindrical bar, 25 mm diameter × 100 mm length (with specified end forms and marking for orientation).

Sampling & preparation: guidelines for machining or forming test pieces, recommended normalizing before machining, and precautions to avoid decarburization or scale.

Heating: uniform heating into the austenitic range, maintained for the agreed period (standard reference: 30 min holding time unless otherwise agreed or validated).

Quenching apparatus: controlled water jet from a vertical supply pipe; water temperature (20 ± 5 °C); jet height and pipe-to-piece spacing are specified to ensure reproducible cooling.

Timing: maximum 5 s between removal from furnace and start of quench; minimum 10 min spraying time (cooling may be completed by immersion).

Hardness measurement: two longitudinal flats (0.4–0.5 mm deep) ground 180° apart; hardness measured as mean from both flats. Rockwell C (HRC) is standard; Vickers HV30 is permitted by agreement (references: ISO 6508 and ISO 6507 series).

Measurement points: typical distances from quenched end - 1.5, 3, 5, 7, 9, 11, 13, 15 mm (subsequent at 5 mm intervals). For low‑hardenability steels: first point at 1.0 mm and 1 mm spacing to 11 mm, then 13, 15, 20, 25, 30 mm.

Results and notation: hardness-distance values plotted as a Jominy curve or reported as Jxx‑d (e.g., J35‑15 = 35 HRC at 15 mm). Annex C provides calculation methods by agreement.

Applications and users

Purpose: quantify how deep a steel will harden under rapid cooling - essential for selecting steels and designing heat‑treatment cycles.

Typical users:

Metallurgists and materials engineers validating steel grades
Heat‑treatment shops and QA laboratories performing routine hardenability testing
Design engineers specifying materials for components requiring controlled hardness profiles (gears, shafts, fasteners)
Standards bodies and product specification writers requiring reproducible test methods

Practical benefits: produces reproducible Jominy curves for comparing steel grades, verifying production batches, and guiding quench/tempering processes.

ISO 642:1999

Abstract

Похожие стандарты

Overview

Key topics and technical requirements

Applications and users

Related standards

Технические детали

ISO 6508-1:2016

Metallic materials — Rockwell hardness test — Part 1: Test method

ISO 6507-3:2018

Metallic materials — Vickers hardness test — Part 3: Calibration of reference blocks

ISO 6507-1:2018

Metallic materials — Vickers hardness test — Part 1: Test method

ISO 6422-1:2010

Layout key for trade documents — Part 1: Paper-based documents