SKD61 Material Hot Rolled/Forged Mould Steel Flat Round Bar

• Type: Round
• Standard: AISI, ASTM, DIN, JIS, GB, BS
• Composition: Stainless Steel Scrap
• Technique: Forged
• Shape: Plate
• Surface Treatment: Black or as Required
• Model NO.: Round bar
• Special Use: High-strength Steel Plate, Wear Resistant Steel, Silicon Steel, Cold Heading Steel, Free Cutting Steel, Mold Steel
• Application: Tool Steel Bar
• Transport Package: Wooden
• Specification: 6-400mm
• Trademark: Smooth
• Origin: China
• HS Code: 7214100000
• Production Capacity: 5000 Ton/Year

Product Description

Introduction

SKD61 tool steel, we can supply the round bar, flat bar, plate and square block. Diameters can
be sawn to your required lengths as one offs or multiple cut pieces. Rectangular pieces can be
sawn from flat bar or plate to your specific sizes. Ground tool steel bar can be supplied, providing
a quality precision finished bar to tight tolerances

Chemical Composition(%)

C	Si	Mn	P	S	Cr	Mo	V	C
0.35~0.42	0.80~1.20	0.25~0.50	≤0.03	≤0.02	4.80~5.50	1.00~1.50	0.80~1.15	0.35~0.42

 

Applications

SKD61 Tool Steel is found in different types of die casting dies for aluminium, magnesium and zinc,
extrusion dies for aluminium and brass, liners, mandrels, pressure pads, followers, bolsters, die
cases,die holders and adaptor rings for copper and brass extrusion.  SKD61 is used to  hot
stamping andpress forge dies, split hot heading dies, gripper dies, hot punching, piercing and
trimming tools. And the SKD61 tool steel also applications include plastic moulds, shear blades
for hot work and hot swaging dies.
 

Hot work tool steel SKD61 Forging

For forging SKD61 tool steel, first slowly Preheat to 750°C(1382°F), soak enough time, then 
rapidly heat to 1050-1100 °C(1922-2030°F). then start forging, ensure the forging temperature
higher than 850°C(1562°F).  Cool SKD61 tool steel must be slowly after H13 steel forging finished.
 

Hot work SKD61 tool steel Annealing

Heat to 840-860°C(1544-1580°F), Soak thoroughly before furnace cool at a maximum rate of
20°C(68°F) / hour, Cool down to 600°C (1112°F). Then cool in air.
 

JIS SKD61 Alloy tool steel Stress Relieving

Before make products, The Tool steel stress relieving is very necessary.  When SKD61 tool steel
is ground, heavily machined, cutting,  milled, the relief of internal strains is necessary before
hardening to minimise the possibility of distortion. for stress relieving, heat the SKD61 steel
component to 700°C(1292°F) carefully, Get enough soaking period. Then cool in the furnace
or cool in the air.
 

SKD61 tool steel Hardening

first should preheat the SKD61 steel parts to 780-820°C(1436-1508°F), Soak enough time,
ensure soak thoroughly. then rapidly heat to 1000-1030°C(1832-1886°F), soak about 30
mins. cool in air or oil.
 

SKD61 tool steel tempering

Heat the SKD61 tool steel parts to tempering temperature, soak enough time until to Soak thoroughly.  
The usual tempering temperature range is 400-650°C(752-1202°F), It depend on the tools hardness
require and the operating temperature.  SKD61 tempering data for your reference as below:

Temperature [°C]	400	500	550	600	650
Hardness [HRc]	54	56	54	49	47