17YRS
WU JII INDUSTRY CO., LTD.
886-4-23593510
886-4-23593529
No. 1, 20th Rd., Industrial Park, Taichung City, Taiwan
www.wujii.com.tw

Products

Properties & Application
W302ESR
W302ESR

Properties

Hot work tool steel featuring excellent hot tensile properties, high hot wear resistance, adequate toughness and heat checking resistance.

Application

Heavy duty hot work tools and dies, mainly for light alloy processing; mandrels, dies, and containers for metal tube and rod extrusion; hot extrusion equipment; tools and dies for the manufacture of hollow bodies, screws, rivets, nuts and bolts.

Die casting equipment, forming dies, die inserts, hot shear blades, and plastic moulding dies.

Specification

HRC: 44-52

Heat treatment

Stress relieving

600 to 650°C/ Slow cooling in furnace; intended to relieve stresses set up by extensive machining, or in complex shapes. After thorough heating, hold in neutral atmosphere for 1-2 hours.

Hardening

1020 to 1080°C 
Oil, salt bath(500-550°C), air 
Holding time after temperature equalization: 15 to 30 minutes. 
Obtainable hardness: 52-56 HRC in oil or salt bath, 50-54 HRC in air.

Tempering

Slow cooling to tempering temperature immediately after hardening/ time in furnace 1 hour for each 20mm of workpiece thickness but at least 2 hours/cooling in air. It is recommended to temper at least twice. 
A third tempering cycle for the purpose of stress relieving may be advantageous stress relieving may be advantageous 
1 st tempering approx. 30°C above maximum secondary hardness. 
2 nd tempering to desired working hardness 
The tempering chart shows average tempered hardness values. 
3 rd for stress relieving at a temperature 30-50°C below highest tempering temperature.

Mold
Machine
Vehicle
Contact Supplier
Browsing History
Scroll Up
EZB2B.TW uses cookies,IP to collect data and continually improve the website. By continuing to use this website, you must agree to the use of cookies and IP.