Corten Steel Plate
Atmospheric corrosion resistant plate that builds its own protective rust instead of paint
Specifications
Alloy Steel Sheet
T1 W18Cr4V Tungsten High Speed Steel
Air or oil hardening tungsten tool steel listed as W18Cr4V T1 SKH2 2750 and HS 18-0-1
1.3355 is the tungsten type high speed steel known as W18Cr4V, T1, SKH2, 2750 and HS 18-0-1, an air or oil hardening tool steel with balanced hardness, strength, toughness and heat resistance. It is called out by makers of turning, planing and slotting instruments, taps, twist drills, threading dies, profile cutting instruments, broaches and reamers, and by tool rooms rebuilding older tooling designed around the tungsten grade rather than a molybdenum one. The usual procurement difficulty is that this grade appears on drawings under five different names and sits in fewer stocks than M2 or M35, so orders stall while equivalence is checked. Stock is held across 0-1000mm thickness and certified under all of those designations.
- Product Name — High speed steel
- Grade — W18Cr4V T1 SKH2 2750 1.3355 HS 18-0-1
- Hardness — HRC62~66
- Thickness — 0-1000mm
- Size — Customized size
Why It Is Specified
Key Benefits of 1.3355 high speed steel
Tungsten Type Rather Than Molybdenum Type
With tungsten at 17.50-18.50 this is the classic W18Cr4V composition. It is the right answer when an older drawing or an existing process was built around the tungsten grade.
Air Or Oil Hardening Response
The grade hardens in air or oil, which gives a heat treater a choice of quench severity and reduces the risk of cracking a long slender tool.
Hardness With Retained Toughness
Hardness is stated as HRC62~66 alongside strength and toughness, so the tool resists both edge wear and the shock of an interrupted cut.
Heat Resistance For Continuous Cutting
Heat resistance is one of the stated properties of this grade, which is why it survives long turning and planing passes where the edge never cools.
Five Designations On One Certificate
W18Cr4V T1 SKH2 2750 1.3355 and HS 18-0-1 all describe the same steel. Certifying against the name on your drawing avoids a hold at inspection.
Cut To Blank Size From Heavy Stock
Thickness reaches 1000mm and size is customized, so a heavy broach or form tool blank can be supplied without your shop sawing it down.
Problems It Solves
What This Material Removes From Your Process
Tungsten Grade Hard To Source Locally
Many stockists carry only molybdenum high speed steels. Holding the W18Cr4V composition means a drawing written around the tungsten type does not have to be redrawn.
Quench Cracking On Slender Tools
A severe quench distorts or cracks long thin tools. This grade hardens in air or oil so the heat treater can choose the gentler route.
Names That Do Not Match Between Drawing And Certificate
T1 SKH2 2750 1.3355 HS 18-0-1 and W18Cr4V are one steel. The certificate can carry the designation your inspection department is looking for.
Heavy Blanks Sawn Down In House
Cutting a large broach blank out of oversize stock eats machine hours. Thickness up to 1000mm with cut to size supply delivers the blank ready to machine.
Application Scenarios
Where It Is Used
Turning Planing and Slotting Tools
Single point and form tools where the edge runs continuously and edge retention sets the time between regrinds.
Taps and Threading Dies
Thread cutting tools where torque and abrasion act together and a broken tap costs more than the tool itself.
Twist Drills
Drill manufacture on the tungsten grade, particularly where an existing product line was specified around W18Cr4V.
Broaching Tools and Reamers
Long multi tooth tools that are expensive to regrind and depend on form holding across a production batch.
Profile Cutting Instruments
Profile and form cutting tools whose geometry must stay accurate through the whole run.
Who It Is For
Buyers Who Specify This Product
- Tool manufacturers producing taps threading dies and twist drills on the tungsten grade
- Tool room engineers rebuilding legacy tooling drawn to W18Cr4V or SKH2
- Broach and reamer makers buying heavy blanks that cannot be cut from thin plate
- Purchasing staff matching a 1.3355 or HS 18-0-1 call out to an available mill certificate
- Tool steel stockists carrying the tungsten type alongside molybdenum high speed steels
- Maintenance shops in machine building that regrind and remake their own form tools
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 | High speed steel |
|---|---|
| Grade | W18Cr4V T1 SKH2 2750 1.3355 HS 18-0-1 |
| Hardness | HRC62~66 |
| Thickness | 0-1000mm |
| Size | Customized size |
| Technique | Annealed quenched and tempered |
| Application | Manufacturing various cutting tools |
| Carbon C | 0.70-0.78 |
| Tungsten W | 17.50-18.50 |
| Chromium Cr | 3.80-4.50 |
| Vanadium V | 1.00-1.20 |
| Silicon Si | 0.45 maximum |
| Manganese Mn | 0.40 maximum |
| Place of Origin | China |
Technical Features
- Grade W18Cr4V with equivalents T1 SKH2 2750 1.3355 and HS 18-0-1
- Tungsten type high speed steel hardening in air or oil
- Hardness stated as HRC62~66
- Thickness 0-1000mm in customized size
- Delivery condition annealed or quenched and tempered
- Surface raw material milling or grinding
- Bending welding decoiling cutting and punching available
- Mill test certificate issued with the material
Materials
- Tungsten type high speed tool steel of the W18Cr4V composition
- Tungsten 17.50-18.50 as the principal carbide forming element
- Chromium 3.80-4.50 for hardenability and vanadium 1.00-1.20 for wear resistance
- Carbon 0.70-0.78 with phosphorus and sulphur held to 0.030
Certification
- Mill test certificate supplied with the material
Manufacturing
How It Is Made and Processed
Steelmaking to the W18Cr4V composition
Hot rolling and forging to plate and blank stock
Annealing to leave the blank machinable
Air or oil hardening and tempering where hardened delivery is ordered
Milling or grinding to the ordered surface condition
Cutting to the ordered blank size
Marking and export packing
Quality Control
Checks Before It Ships
- Composition checked against the C W Cr V Si Mn P S limits
- Hardness reviewed against the stated HRC62~66 range for the grade
- Mill test certificate raised under the designation you order
- Thickness verified inside 0-1000mm before cutting
- Blank sizes and surface finish checked against the order before packing
Customization
What We Can Change on Your Order
- Heavy blanks cut to size from thickness up to 1000mm
- Annealed or quenched and tempered condition on request
- Raw milled or ground surface to suit the next machining step
- Punching bending and decoiling carried out before dispatch
- Certificate issued under W18Cr4V T1 SKH2 2750 1.3355 or HS 18-0-1
Comparison
1.3355 high speed steel Against the Alternatives
| M35 cobalt high speed steel | M35 is the molybdenum cobalt type. 1.3355 is the tungsten type at 17.50-18.50 W and is the grade to hold when the drawing specifies W18Cr4V. |
|---|---|
| Carbon tool steel | Carbon tool steel has no comparable heat resistance, so it cannot hold an edge in the continuous turning and planing duties this grade is used for. |
| Cemented carbide inserts | Inserts are indexed and thrown away. A W18Cr4V tool is reground repeatedly, which suits form tools and broaches that no insert geometry covers. |
Use Guide
Specifying Handling and Welding Notes
- Confirm whether your drawing needs the tungsten type before substituting a molybdenum high speed steel
- Choose the oil quench for slender sections and air hardening where distortion control matters most
- Set grinding allowance against the stated HRC62~66 hardness range
- Order the blank close to finished size when thickness is heavy so machine time is not spent on roughing
- Ask for the mill test certificate under the exact designation used by your inspection department
- Keep annealed and hardened stock separated and labelled in the tool store to avoid mixed batches
Questions Buyers Ask
1.3355 high speed steel FAQ
Is 1.3355 the same as T1 and W18Cr4V?
Yes. W18Cr4V T1 SKH2 2750 1.3355 and HS 18-0-1 are designations for the same tungsten type high speed steel.
What hardness does this grade reach?
The hardness for this tool steel is stated as HRC62~66, together with strength toughness and heat resistance.
Does it harden in air or in oil?
It is an air or oil hardening tool steel, so the heat treater can pick the quench severity that suits the section and shape.
What tools is it normally used for?
Turning planing and slotting instruments, taps, twist drills, threading dies, profile cutting instruments, broaching instruments and reamers.
How thick can you supply it?
Thickness runs from 0-1000mm and size is customized, so heavy broach and form tool blanks can be cut for you.
What is the tungsten content?
Tungsten runs 17.50-18.50 with chromium 3.80-4.50, vanadium 1.00-1.20 and carbon 0.70-0.78.
Can we see a sample and the certificate before ordering?
Samples are available and a mill test certificate is issued for the ordered grade. Ask for the mill test certificate when you send the enquiry.
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