Corten Steel Plate
Atmospheric corrosion resistant plate that builds its own protective rust instead of paint
Specifications
Alloy Steel Sheet
D2 SKD11 Cold Work Mold Steel
Vacuum degassed cold work die steel with strong hardenability and stable size
D2 SKD11 is a high chromium cold work die steel supplied under the designations 1.2379, Cr12Mo1V1, X153CrMoV12, X12M and SKD11. Die makers building blanking and forming tooling specify it where the working edge has to resist wear run after run and the tool has to come back to size after hardening. Because it is spheroidize annealed before shipment it cuts cleanly in the soft state, so a tool shop can machine the cavity and the die plate before the heat treatment cycle rather than fighting hard material. Vacuum degassing refines the steel before it is rolled, which matters on tool faces that will be polished or held to tight profile.
- Product Name — Mold steel
- Grade — 1.2379 sk10 SKD11 D2 X153CrMoV12 X12M
- Also Known As — Cr12Mo1V1 cold work die steel
- Thickness — 0-1000mm
- Size — Customized size
Why It Is Specified
Key Benefits of D2/SKD11 Mold Steel
Good Cutting Performance After Annealing
Spheroidization annealing softening treatment leaves the steel in a condition that machines cleanly. Cavity milling, drilling and turning are done before the tool is hardened.
Wear Resistance From Vanadium and Molybdenum
The steel contains vanadium and molybdenum, which is what gives the working face its wear resistance in continuous blanking and forming duty.
Vacuum Degassing for a Cleaner Steel
Vacuum degassing refining treatment makes the steel purer, which shows up on polished faces and on edges that are held to a fine profile.
Strong Hardenability Through the Section
As a cold work die steel it hardens strongly, so the working hardness carries into thick die plates rather than stopping at the surface.
Stable Size Through Heat Treatment
Dimensional stability during hardening keeps the finished tool close to the machined size and reduces the corrective grinding needed after treatment.
High Hardness and Wear Resistance After Treatment
Once heat treated the material combines high hardness with wear resistance, which is the pairing a blanking edge needs to survive long production runs.
Problems It Solves
What This Material Removes From Your Process
Dies Moving Out of Size During Hardening
A tool that distorts in heat treatment has to be reground back to print or scrapped. The dimensional stability of this cold work grade keeps the hardened tool close to its machined size.
Edges Wearing Faster Than the Production Run
A blanking edge that dulls mid run forces an unplanned tool change. The vanadium and molybdenum content gives the wear resistance the edge needs to reach the end of the run.
Poor Surface on Polished Tool Faces
Inclusions show up as pitting when a tool face is polished. Vacuum degassing refining treatment produces a purer steel for those faces.
Slow Machining on Hard Delivered Stock
Material delivered too hard slows cavity cutting and wears out end mills. Spheroidize annealed stock machines in the soft condition first.
Buying Full Plates for a Single Insert
Cut to size supply from 0-1000mm stock means a die insert order does not come with an offcut you have to store.
Application Scenarios
Where It Is Used
Blanking and Forming Dies
Die plates and inserts for blanking and forming operations where the cutting edge sees sheet stock on every stroke.
Press Tools and Punches
Press tooling and punches that must hold profile through a production run without being pulled for regrinding.
Forming Rolls
Rolls that shape strip continuously and wear on the profile faces rather than on a single edge.
Bits and Bushes
Bits, guide bushes and wear parts inside a die set where sliding contact gradually opens clearances.
Trim and Pierce Tooling for Sheet Metal Shops
Trim and pierce stations rebuilt from stock so a worn insert can be replaced without remaking the whole die.
Who It Is For
Buyers Who Specify This Product
- Die makers building blanking and forming tooling for sheet metal presses
- Press shops remaking their own punches and die inserts during scheduled tool maintenance
- Roll forming equipment builders specifying material for forming rolls
- Tooling engineers quoting cold work dies against a drawing that calls SKD11 or 1.2379
- Machine shops supplying bits bushes and wear parts into customer die sets
- Tool steel stockists holding cold work die steel for regional tool rooms
Technical Data
Specifications and Technical Features
Values below come from the product data published by Shandong Tianyu Metal Products. Confirm the exact grade and size against your order.
| Product Name | Mold steel |
|---|---|
| Grade | 1.2379 sk10 SKD11 D2 X153CrMoV12 X12M |
| Also Known As | Cr12Mo1V1 cold work die steel |
| Thickness | 0-1000mm |
| Size | Customized size |
| Technique | Annealed quenched and tempered |
| Refining | Vacuum degassing |
| Surface | Raw material milling grinding |
| Application | Blanking and forming dies forming rolls press tools punches bits and bushes |
| Place of Origin | China |
| Processing Service | Bending welding decoiling cutting punching |
| Certificate | Mill test certificate |
| Sample | Available |
Technical Features
- Grades 1.2379 D2 SKD11 Cr12Mo1V1 X153CrMoV12 X12M and sk10
- High chromium cold work die steel with vanadium and molybdenum
- Spheroidization annealing softening treatment for machinability
- Vacuum degassing refining treatment for a purer steel
- Thickness 0-1000mm supplied to customized size
- Delivery condition annealed or quenched and tempered
- Surface as raw material milled or ground
- Processing covers bending welding decoiling cutting and punching
Materials
- High chromium cold work die steel of the D2 and SKD11 family
- Vanadium and molybdenum alloying for wear resistance at the working face
- Vacuum degassed and refined before hot working
- Supplied in the spheroidize annealed condition for machining
Certification
- Mill test certificate supplied with each shipment
Manufacturing
How It Is Made and Processed
Melting followed by vacuum degassing refining treatment
Hot working to plate and bar section
Spheroidization annealing softening treatment
Cutting to the ordered die plate or insert size
Milling or grinding the faces where ordered
Optional quenching and tempering to working hardness
Marking edge protection and export packing
Quality Control
Checks Before It Ships
- Mill test certificate issued against the ordered grade
- Annealed condition confirmed before the material is cut
- Section dimensions checked against the die plate cutting list
- Surface inspected as raw milled or ground before packing
- Rust preventive applied and packing checked at loading
Customization
What We Can Change on Your Order
- Die plates and inserts cut to your tool drawing sizes
- Surface supplied as raw material milled or ground
- Annealed stock for in house hardening or quenched and tempered supply
- Thickness selected across the 0-1000mm range
- Drilling and punching completed before shipment
- Marking to the grade designation used in your tool room
Comparison
D2/SKD11 Mold Steel Against the Alternatives
| Water hardening carbon die steel | Carbon die steel is cheaper but moves more in quench and wears out faster on the blanking edge, so tool changes come sooner. |
|---|---|
| Plastic mold steel such as P20 | Pre-hardened plastic mold steel is made for cavity work at moderate load, whereas this grade is built for the wear and impact of cold blanking and forming. |
| High speed steel punches | High speed steel suits tools that generate cutting heat, while this cold work grade is the economic choice for ambient temperature blanking and piercing. |
| Cemented carbide die inserts | Carbide lasts longer on very high volume work but chips under shock and costs far more to machine, whereas D2 inserts can be made and reground in a normal tool room. |
Use Guide
Specifying Handling and Welding Notes
- Rough machine the die in the annealed condition and leave grinding stock for after heat treatment
- Stress relieve between roughing and finishing on large die plates so the tool stays flat through hardening
- Preheat in stages before the hardening soak because high chromium steel is sensitive to rapid heating
- Temper promptly after quench and run a second temper before the tool goes into the press
- Keep sharp internal corners out of the design because they concentrate stress in a hardened cold work die
- Ask for the mill test certificate so the grade is on file with the tool build record
Questions Buyers Ask
D2/SKD11 Mold Steel FAQ
What thickness of D2 SKD11 can you supply and do you cut it?
Thickness covers 0-1000mm and size is customized, so die plates and inserts are cut to your drawing sizes rather than sold as full plates.
Is 1.2379 the same as D2 and SKD11 on our tool drawing?
Yes. The same cold work die steel is supplied as 1.2379, D2, SKD11, Cr12Mo1V1, X153CrMoV12 and X12M.
Does the material arrive soft enough to machine?
It is supplied after spheroidization annealing softening treatment, which gives it good cutting performance so the cavity and plate can be machined before hardening.
Why does vacuum degassing matter for a die steel?
Vacuum degassing refining treatment makes the steel purer, which shows on polished tool faces and on fine blanking edges where inclusions would otherwise appear.
Will the die hold its size through heat treatment?
This grade is characterized by strong hardenability and stable size, so the hardened tool stays close to the machined dimensions.
Can you supply the plate already milled or ground?
Surface is available as raw material, milled or ground. Ground plate saves the squaring setup when the die plate goes straight to cavity machining.
Can we order one insert as a trial before the full die set?
Samples are available. Send the insert size and surface condition you need and we will confirm what can be released.
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