Corten Steel Plate
Atmospheric corrosion resistant plate that builds its own protective rust instead of paint
Specifications
Alloy Steel Sheet
1.3343 Tungsten Molybdenum High Speed Steel
Medium alloy high speed steel supplied against the DIN 1.3343 designation
1.3343 is the conventionally manufactured medium alloy high speed steel that most tool rooms fall back on when a job has no reason to use anything more specialized. Tool grinders, punch and die makers and cutting tool manufacturers call it out on drawings as 1.3343, M2, HS6-5-2, SKH51, S600, P6M5 or W6Cr5Mo4V2 depending on the standard they work to. Buying it already cut from stock in the annealed condition removes the sawing and squaring work that otherwise sits between goods in and the first machining setup. Delivery hardness is at or below 260HB so the blank machines cleanly, and after heat treatment the achievable hardness is up to 65Hrc.
- Product Name — High speed steel
- Grade — P6M5 M2 W6Cr5Mo4V2 HS6-5-2 SKH51 1.3343 S600
- Delivery Hardness — At or below 260HB
- Hardness After Treatment — At or below 65Hrc
- Thickness — 0-1000mm
Why It Is Specified
Key Benefits of 1.3343 high speed steel
Balanced Toughness Wear Resistance and Red Hardness
The tungsten molybdenum composition gives a combination of toughness, wear resistance and red hardness rather than pushing one property at the expense of the others. That is what makes it usable across an entire tool room.
Machinable at Delivery Hardness
Delivery condition hardness is at or below 260HB, so blanks can be sawn, milled and drilled before heat treatment without unusual tooling or feed rates.
Hardness to 65Hrc After Treatment
Achievable hardness after heat treatment is up to 65Hrc, which is the working range for twist drills, taps, milling cutters and saw blades.
Red Hardness Under Cutting Heat
The alloy holds its hardness when the cutting edge heats up, so tools keep cutting during high speed light cut work instead of dulling as the edge softens.
One Grade That Covers Most Tool Types
The same bar and plate stock serves cutting tools, cold work punches and dies, so a tool room can carry one high speed steel instead of several.
Surface Condition Set at Order Stage
Material ships as raw stock, milled or ground, so you can skip the squaring operation when the blank is going straight onto a machining center.
Problems It Solves
What This Material Removes From Your Process
Blanks Arriving Too Hard to Machine
Material delivered in the wrong condition forces an annealing cycle before any cutting starts. The delivery hardness here is at or below 260HB so machining can begin as received.
Tools Losing the Edge as the Cut Heats Up
Carbon tool steel softens once the edge runs hot and the cut degrades. The red hardness of this grade keeps the edge working through high speed light cuts.
Matching a Drawing Written to a Foreign Standard
A drawing calling SKH51 or P6M5 often stalls sourcing. The same steel is supplied under 1.3343, M2, HS6-5-2, S600 and W6Cr5Mo4V2.
Sawing Full Lengths Down to Blank Size
Cutting and squaring stock in house consumes saw time and produces offcuts you store. Material is cut to your blank list and can ship milled or ground.
Application Scenarios
Where It Is Used
Twist Drill and Tap Manufacture
Drill and tap blanks where the flute geometry is ground after hardening and the tool has to hold an edge through a long production run.
Milling Cutters and Saw Blades
Milling cutters, saws and decoiling blades that cut at speed with light chip loads and heat the edge continuously.
Cold Work Punches and Dies
Blanking punches, pierce punches and die inserts where wear on the working face decides how often the tool is pulled for regrinding.
Industrial Knives and Cutting Blades
Knives and cutting blades for converting and processing lines that run against abrasive stock.
Tool Room Spares and Regrind Stock
Blank stock held in a maintenance tool room so a worn punch or cutter can be remade without waiting for a mill order.
Who It Is For
Buyers Who Specify This Product
- Cutting tool manufacturers buying blank stock for drills taps and milling cutters
- Die and punch makers sourcing cold work tooling material in annealed condition
- Tool room supervisors holding spare stock for in house punch and cutter remanufacture
- Saw and industrial knife producers specifying HS6-5-2 or SKH51 on their drawings
- Machine shops quoting tool components against a customer drawing written to DIN 1.3343
- Tool steel distributors stocking a general purpose high speed steel for regional workshops
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 | P6M5 M2 W6Cr5Mo4V2 HS6-5-2 SKH51 1.3343 S600 |
| Delivery Hardness | At or below 260HB |
| Hardness After Treatment | At or below 65Hrc |
| Thickness | 0-1000mm |
| Size | Customized size |
| Technique | Annealed quenched and tempered |
| Surface | Raw material milling grinding |
| Chemical Composition | C 0.78-0.88 W 5.50-6.75 Mo 4.5-5.50 Cr 3.75-4.50 V 1.75-2.20 Si 0.20-0.40 Mn 0.15-0.40 Ni and Cu 0.75 P 0.030 S 0.030 |
| Application | Manufacturing various cutting tools |
| Place of Origin | China |
| Processing Service | Bending welding decoiling cutting punching |
| Certificate | Mill test certificate |
| Sample | Available |
Technical Features
- Grades 1.3343 M2 P6M5 W6Cr5Mo4V2 HS6-5-2 SKH51 and S600
- Medium alloy tungsten molybdenum high speed steel
- Delivery condition hardness at or below 260HB
- Achievable hardness after heat treatment at or below 65Hrc
- Thickness range 0-1000mm with 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
- Medium alloy tungsten molybdenum high speed steel
- Tungsten 5.50-6.75 and molybdenum 4.5-5.50 as the primary alloying pair
- Chromium 3.75-4.50 and vanadium 1.75-2.20 for hardenability and carbide wear resistance
- Carbon 0.78-0.88 setting the attainable hardness
Certification
- Mill test certificate supplied with each shipment
Manufacturing
How It Is Made and Processed
Melting and hot working to bar and plate section
Spheroidize annealing to the machinable delivery condition
Cutting stock to the ordered blank size
Milling or grinding the surface where ordered
Quenching and tempering where hardened material is required
Hardness check against the ordered condition
Marking packing and loading for export
Quality Control
Checks Before It Ships
- Mill test certificate issued against the ordered grade
- Delivery hardness verified at or below 260HB before shipment
- Chemical composition checked against the stated element ranges
- Cut blank dimensions verified against the cutting list
- Surface condition inspected as raw milled or ground
- Packing checked for corner and edge protection before loading
Customization
What We Can Change on Your Order
- Blanks cut to your tooling list rather than supplied in full lengths
- Surface supplied as raw material milled or ground
- Annealed stock for in house heat treatment or quenched and tempered on request
- Thickness selected across the 0-1000mm range
- Punching and drilling carried out before shipment
- Grade marked to the designation used on your drawing
Comparison
1.3343 high speed steel Against the Alternatives
| Carbon tool steel | Carbon tool steel loses hardness once the cutting edge heats up, while the red hardness of 1.3343 holds the edge through high speed light cuts. |
|---|---|
| Cemented carbide tooling | Carbide runs faster but chips under interrupted cuts and cannot be reground in a general tool room, whereas 1.3343 blanks are machined and reground with normal equipment. |
| Cobalt bearing high speed steel | Cobalt grades are chosen for the hottest cutting duty, while 1.3343 covers the general range of tools at a lower material cost. |
| Cold work die steel | Cold work die steel suits blanking at ambient temperature, while 1.3343 is the choice where the tool has to cut and generate heat at the edge. |
Use Guide
Specifying Handling and Welding Notes
- Machine the blank in the annealed condition while hardness is at or below 260HB and leave grinding stock for after heat treatment
- Preheat in stages before austenitizing because high alloy content makes this grade sensitive to thermal shock
- Temper more than once to convert retained austenite before the tool goes into service
- Leave enough material on the working face for the number of regrinds the tool will see over its life
- Order blanks milled or ground where the shop has no surface grinder free for squaring stock
- Ask for the mill test certificate so the grade and composition are documented against the tool drawing
Questions Buyers Ask
1.3343 high speed steel FAQ
What hardness does 1.3343 reach after heat treatment?
Achievable hardness after treatment is up to 65Hrc. The material ships at a delivery condition hardness at or below 260HB so it can be machined before hardening.
Is 1.3343 the same steel as M2 and SKH51?
Yes, they are designations for the same medium alloy tungsten molybdenum high speed steel, along with P6M5, W6Cr5Mo4V2, HS6-5-2 and S600.
What thickness can you supply and will you cut it to blank size?
Thickness runs from 0 to 1000mm and size is customized. Send your blank list and material is cut before shipment instead of arriving in full lengths.
Can we order the surface already milled or ground?
Yes. Surface is supplied as raw material, milled or ground, so the blank can go straight onto the machine without a squaring operation.
Do you provide the chemical composition with the order?
The mill test certificate covers the ordered grade, and the composition ranges are carbon 0.78-0.88, tungsten 5.50-6.75, molybdenum 4.5-5.50, chromium 3.75-4.50 and vanadium 1.75-2.20.
Can we test a small piece before ordering a full set of blanks?
Samples are available. Tell us the section size and surface condition you want to evaluate and we will confirm what can be released.
Is this grade suitable for cold work punches as well as cutting tools?
It is used for cold work punches and dies as well as twist drills, taps, milling cutters, saws and knives, which is why tool rooms keep it as a general purpose stock.
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