SKD61 Hot Rolled Tool Steel Bar

SKD61 Hot Rolled Tool Steel Bar

1: SKD61 Steel Introduction

SKD61 steel is a Japanese grade of hot work die steel, corresponding to China's grade (GB/T 1299-2000) is 4Cr5MoSiV1, is one of the most widely used hot work die steel. SKD61 steel through the vacuum degassing refining treatment, the steel quality is pure, with good toughness and resistance to high-temperature fatigue, can withstand the temperature of the aggregation, suitable for long-term work at high temperatures. Long-term work at high temperatures. It also has good cutting performance and polishing performance, after electric furnace smelting and after electroslag remelting, the steel is more pure, toughness is better.SKD61 steel bar can be nitrided to improve the surface hardness and abrasion resistance, which is particularly important for extrusion molds and die casting molds, can improve the abrasion and corrosion resistance of the mold, is conducive to the products of rapid demolding.

SKD61 Steel Stock in Warehouse

2: SKD61 Quality Standard

SKD61 steel according to JIS G4404.

3: SKD61 Steel Equivalent

4: SKD61 Steel Chemical Composition

5: SKD61 Steel Mechanical Properties
The mechanical properties mainly include tensile strength, yield strength, elongation, area or reduction, hardness, impact value, non-metalic inclusion etc. Different heat treatment, the mechanical properties will be different, such as normalized, tempered, QT. If you want to know the properties, kindly contact the salesman.

6: SKD61 Steel Overviews

7: SKD61 Steel Application

Plastic Molds: SKD61 is often used in the manufacture of plastic injection molds, extrusion molds, etc. due to its excellent heat resistance and abrasion resistance, which can meet the requirements of high temperature and high pressure environment.

Aluminum Alloy Molds: SKD61 is also often used in aluminum alloy extrusion molds, aluminum die casting molds, etc., in aluminum alloy processing can effectively improve the service life of the mold and production efficiency.

Casting Molds: SKD61 is also suitable for casting mold manufacturing, can meet the casting process of high temperature and high pressure environment requirements, to ensure the stability and durability of the mold.

In addition, SKD61 steel is also suitable for the production of aluminum, zinc, copper alloy extrusion mold, die casting die, hot forging die, and hot shear tooling and other small specifications of the shaded steel, is the production of ejector rods, the Division of the ideal material.

8: SKD61 Steel Heat Treatment

Heating

Generally 1020-1050 ℃, holding time is about 30-60 minutes. This is followed by oil or air cooling.The heat treatment hardness of SKD61 steel can reach 52-56 HRC.

Quenching

Includes two stages of preheating (500~550°C and 750~800°C) as well as blow cooling or high pressure gas cooling, and finally at 100~150°C into the tempering furnace. Quenching temperature is generally 1000~1050 ℃, the hardness can reach 50~55 HRC, heat treatment deformation is small, can be nitriding treatment to further improve wear resistance.

Tempering

The preheating temperature is 300~350℃, and the tempering heating temperature is between 550~680℃. After tempering air cooling to room temperature, usually three times tempering.

9: SKD61 Steel Tolerance

10: Delivery Condition

For hot forged or hot rolled bar, usually the delivery condition is hot forged or rolled, annealed or QT, black surface or rough turned.
For hot forged plate, usually the delivery condition is hot forged, annealed or QT, milled surface.
For hot rolled plate, usually the delivery condition is hot rolled, annealed or QT, black surface.