SKD11 Tool Steel Pipe Steel Tube

SKD11 Tool Steel Pipe Steel Tube

1: SKD11 Steel Introduction

SKD11 is a Japanese JIS standard grade, a high wear-resistant and toughness general-purpose cold work tool steel, a high-carbon, high-chromium alloy tool steel, and a vacuum degassing refined steel. It is a pure steel with good quenching properties, good hardenability, and a small amount of fire deformation in quenching. The steel has been softened by spheroidizing in fire retreats and has good workability, fine and uniform carbide particles, and the addition of the strengthening elements molybdenum and vanadium eliminates the need to be concerned about cracking in fire quenching. High-hardness, high-wear-resistant eutectic carbide uniformity, high toughness, not easy to crack, hardness >62 HRC after fire quenching.

SKD11 Steel Stock In Warehouse

2: SKD11 Quality Standard

SKD11 steel according to JIS G4404.

3: SKD11 Steel Equivalent

4: SKD11 Steel Chemical Composition

5: SKD11 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: SKD11 Steel Overviews

7: SKD11 Steel Application

• Used for making shears, shears, circular saws, five-stamping dies, and forming rolls.

• Cold or hot work trimming dies, roller edges, filigree, wire dies, transformer core punching dies, cutting steel rolls, steel pipe forming rolls, special forming cylinders, nail punching head dies, etc.

• Various kinds of shears, inlays, thread rolling molds.

• Resistant slider cold heading mold, deep drawing mold, cold extrusion mold.

• Thermosetting resin molds and general plastic molds.

8: SKD11 Steel Heat Treatment

Hardening

First, SKD11 steel needs to be preheated to 700 to 750°C, then heated to 1000 to 1050°C and cooled in still air. For steel tools thicker than 6 inches, the preheating temperature is adjusted to 980 to 1030 ℃ and quenched better in oil. The purpose of this step is to increase the hardness and strength of the steel by rapid cooling. 

Tempering

The next step is the tempering step where the steel is heated to 150 to 200°C, left at this temperature and then cooled in still air. The tempering process is designed to adjust the internal structure of the steel to reduce the internal stresses and brittleness produced during the quenching process, while maintaining the hardness and strength of the steel and increasing its toughness and wear resistance. 

Nitriding

In order to meet the requirement of high surface hardness, SKD11 steel can be nitrided. This step is carried out after quenching and tempering and is designed to improve the surface hardness and wear resistance of the mold. 

Deep Cooling Treatment

In order to obtain higher hardness and improve dimensional stability, the molds are subjected to a deep cooling treatment immediately after quenching, with the temperature maintained at -70 to -80°C for 3-4 hours, followed by a tempering treatment. Deep-cooling treatment can increase the hardness of the tool or mold by 1-3 HRC compared with conventional heat treatment.

9: Alloy Round Bar Tolerance

10: Delivery Condition
For hot forged bar, usually the delivery condition is hot forged, annealed rough turned/Black surface.
For hot rolled bar, usually the delivery condition is hot rolled, annealed, Black surface.
For hot forged plate, usually the delivery condition is hot forged, annealed, milled surface
For hot rolled plate, usually the delivery condition is hot rolled, annealed, black surface.