SKD11 Tool Steel Rolled Round Bar

SKD11 Tool Steel Rolled Round Bar

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: Qilu Company Profile

Hunan Qilu was engaged in steel exporting since 2008 year, the former was the sales company for Qilu Special Steel co.,ltd which was founded in 1986 year. Now Hunan Qilu Metal is one of most professional steel manufacturer and exporter in China. We already exported steel material to Germany, UK, Ireland, Greece, Italy, Poland,Belgium, Estonia, Latvia, Spain, France, Netherlands, Portugal, Czech republic, Finland, Russia, Belarus, Canada, Mexico, Brazil, Chile, Colombia, Peru, Argentina, Venezuela, Thailand, Indonesia, Vietnam, Singapore, Malaysia, Philippines, UAE, South Africa, Zambia, Australia etc.

7: Production Equipment

The company owns advanced special steel smelting facilities and forging processing equipment, the main steel-making equipment include 2 set of 50t and 25t ultra-high power electric arc furnaces, 2 set of 60t and 30t LF refining furnaces, 2 set of 60t and 30t vacuum degassing refining furnace. 4 sets of 1-20t electroslag re-melting furnaces.

The main forging equipment mainly include:3 sets of 3t 5t and 8t electro-hydraulic hammers, 3 sets of high-speed forging units of 1600t, 2000t and 4500t respectively.

8: Our Company Certificate

We already passed ISO 9000 : 2015 certificate of quality system, and we could supply steel forging material with all kinds of Classification Society Certification, such as ABS, ,DNV, BV, CCS etc. We also supplied steel material to oil industry with API certificate, such as API20B, API6A etc.

9: Stock&Warehouse

Besides forging material, we also supply hot rolled material from Dongbei special steel, Tiangong, Changcheng special steel, Lihuai Special Steel, Laisteel, Juneng steel, Yongsteel, Xinxin steel, Shijiazhuang steel etc. We have two warehouses for hot rolled material. Further processing such as heating treatment, rough machining and milled are also provided by us.

10: SKD11 Steel Overviews

11: SKD11 Steel Tolerance

12: Packing& Delivery

For the delivery, we will choose LCL, FCL and Bulk carrier according to order quantity. Usually if the quantity is less than 10tons, we will recommend LCL. If the quantity is more than 100tons, we will recommend bulk carrier. Usually FCL will be the most common for delivery.

In order to better ensure the safety of your goods, we will provide professional, environmentally friendly, convenient and efficient packaging services. Such as pallet, wooden box, package with woven bag etc.

13: 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.

14: 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.

15: 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.