Tungsten Carbide Wire Drawing Die

Tungsten Carbide Wire Drawing Die – Precision Carbide Drawing Dies by YF Metal Tech

YF Metal Tech supplies tungsten carbide wire drawing dies for steel, stainless steel, copper, aluminum and alloy wire. A tungsten carbide (cemented carbide) drawing die has a nib of tungsten carbide grains bonded with cobalt, so it combines high hardness with enough toughness to handle heavy reductions and different wire sizes at a moderate price. We have built wire drawing machines for more than 30 years, and we choose the carbide grade, bore geometry and polish of every die around the way your line actually runs: wire material, drawing speed, lubricant and reduction per pass.

Tungsten Carbide Drawing Die at a Glance

Item	Details
Die material	Cemented tungsten carbide (WC-Co), （grades offered, e.g. YG6A, K20,YG6X, K10,YG8, K30,YG12, K30-K40,YG15, K30-K40,YG20 ）
Typical wire materials	Carbon steel, stainless steel, copper, aluminum, alloy and plated wire
Drawing process	Wet and dry drawing; pressure and non-pressure dies
Configurations	Carbide nib in a steel or stainless casing; finished dies or die blanks
Bore size range	0.15–0.5 mm ~ 70.00–76.00mm
Customization	Grade, bore size, reduction angle, bearing length, casing size and polish, on request
Typical use	Steel wire rope, twisted wire, low carbon steel wire, high carbon steel wire, stainless steel wire,cutting wire, steel curtain wire, welding wire, copper wire, aluminum wire, iron pipe, copper pipealuminum pipe, stainless steel pipe, etc.

Why Choose Tungsten Carbide Wire Drawing Dies?

1. Proven all-round performance at a sensible cost

Tungsten carbide is the most widely used drawing die material because it balances hardness, toughness and price. For most standard wire and for medium-length runs, it gives a lower purchase cost than diamond dies while still holding size well.

2. A grade for every wire

By changing cobalt content and grain size, we can tune the same material from very hard and wear-resistant to tougher and impact-resistant. That is how one die family covers fine steel wire, general non-ferrous wire and heavy-duty coarse wire.

3. Easy to rework

When a carbide die wears, the bore can often be re-lapped and polished back into shape and used again at a slightly larger size, so the die keeps earning after its first life.

4. Wide size range and ready supply

Carbide dies are practical from large rod-breakdown sizes down to fine wire, so one supplier can cover most positions on a multi-die machine. 【Add your stock sizes and lead time】

Tungsten Carbide Wire Drawing Die Technical Specification

We supply both finished wire drawing dies with steel cases and tungsten carbide blank nibs.

Inner size (mm)	Size of carbide (mm)	Recommendation steel size (mm)	Tolerance (mm)
0.15–0.5	9*6	25*12	-0.01/0
0.5–2.6	13*10	30*16	-0.01/0
0.8–3.5	16*13	32*23	-0.01/0
1.0–3.5	16*14	32*23	-0.01/0
1.5–6.5	20*17	40*25	-0.01/0
1.8–6.5	22*18	40*26	-0.01/0
3.0–9.5	25*20	50*28	-0.01/0
5.5–12.5	30*22	70*35	-0.02/0
8.5–16.5	35*25	75*35	-0.02/0
12.5–16.5	38*25	80*35	-0.02/0
16.5–21.5	40*25	85*35	-0.02/0
21.5–24.5	50*28	110*45	-0.03/0
24.5–34.5	60*35	120*50	-0.03/0
34.5–43.5	70*35	130*60	-0.035/0
43.5–45.5	80*35	140*60	-0.035/0
45.5–51.00	90*35	150*60	-0.05/0
51.00-56.00	100*40	160*75	-0.05/0
57.00–65.00	110*40	170*75	-0.05/0
66.00–69.00	120*45	180*80	-0.05/0
70.00–76.00	130*50	190*85	-0.05/0

How to Choose the Carbide Grade: Cobalt Content and Grain Size

In cemented carbide, cobalt is the binder that holds the tungsten carbide grains together. More cobalt gives a tougher, more shock-resistant die but lowers hardness and wear resistance. Finer grains give higher hardness and a finer polish, coarser grains give more toughness. Grade names differ between makers, so treat the table as a guide and ask us to confirm a grade for your wire.

Grade type	Typical cobalt content	Main strength	Suitable for
Low cobalt, fine grain (ISO K01-type)	About 3%	Highest hardness and wear resistance, lower toughness	Fine steel wire, small bores, high surface-finish requirements
Medium cobalt (ISO K10-type, YG6-type)	About 6%	Balance of hardness and toughness	General-purpose; wide range of wire, especially non-ferrous
Higher cobalt (ISO K20-type, YG8 and above)	About 8% and higher	Higher toughness and impact resistance	Larger and coarser wire, heavy reductions, heavy-duty use

【Replace with your own grade codes and add certified hardness and transverse rupture strength values from your test reports.

Tungsten Carbide vs PCD Drawing Dies

Property	Tungsten carbide die	PCD (polycrystalline diamond) die
Purchase price	Lower	Higher
Wear resistance	Good; wears faster on abrasive wire	Much higher; commonly many times carbide life
Toughness against shock	Higher	Lower than carbide, but better than single-crystal diamond
Bore sizes	Practical from rod size to fine wire	Small to large, higher cost per die
Reworking	Often can be re-lapped to a larger size	Possible, but needs diamond tooling
Best use	Rod breakdown, short and medium runs, cost-sensitive work	Long runs, abrasive wire, tight roundness

The fair comparison is cost per ton of wire drawn, not price per die. Add the die price and the downtime for changeovers, then divide by the tonnage drawn before the wire leaves tolerance. Carbide usually wins on short and medium runs and on early passes. PCD usually wins on long runs of abrasive wire. If your line is in the second group, see our PCD drawing die page.

Carbide Drawing Die Design: Bore Geometry That Controls Wire Quality

The bore of a drawing die is divided into zones, and each one has a job. Getting the geometry right matters as much as choosing the grade.

Bore zone	Function	What we match to your process
Entrance (bell mouth)	Guides the wire in and carries lubricant into the die	Bell shape and polish for your lubricant and speed
Reduction zone (approach angle)	Does the actual diameter reduction	Angle chosen for wire material and reduction per pass
Bearing (land)	Sets the final diameter and holds size	Bearing length for tolerance and die life
Back relief (exit)	Lets the wire leave the die cleanly	Exit angle so the wire does not scratch on the way out

Reduction angle and bearing length depend on the wire material and how much the cross-section is reduced. For small reductions, a more acute reduction angle and a longer bearing than usual are generally used. We set these values from your drawing schedule instead of using one standard profile for every pass.

Our manufacturing process

1. Grade selection. We choose cobalt content and grain size for the wire and the die position.
2. Forming and sintering. The carbide nib is pressed with its bore pre-formed and sintered to full density.
3. Bore finishing. The bore is lapped to the specified angles with diamond compound, then polished. Polish quality at the reduction zone and bearing directly affects wire surface and die life.
4. Mounting. The nib is fitted into its steel or stainless casing with controlled stress.
5. Inspection. Each die is checked before shipment.

Applications: What Wire Can You Draw With Carbide Dies?

Wire type	Recommended grade direction	Notes from our drawing experience
Fine carbon and stainless steel wire	Low cobalt, fine grain	Hardness and polish matter most; keep reductions steady
Welding wire (including copper-coated)	Medium cobalt	Plating layer is abrasive; check wear and rework early
Spring wire and high-carbon wire	Low to medium cobalt	High drawing force; match the reduction angle to the schedule
Copper and copper alloy wire	Medium cobalt	General-purpose choice for rod breakdown and intermediate passes
Aluminum and aluminum alloy wire	Medium cobalt	Good lubrication prevents pickup on the bearing
Large-diameter or coarse wire, heavy reductions	Higher cobalt	Toughness resists chipping from shock and heavy load

For long runs of abrasive wire, or when roundness must stay tight for a long time, consider a PCD drawing die for those positions and keep carbide for the rest of the line.

How to Select a Tungsten Carbide Drawing Die?

To recommend a grade and geometry we need the following. If you only have part of it, send what you have and we will ask for the rest.

1. Wire material, hardness and coating.
2. Incoming and finished diameter, and the reduction per pass.
3. Drawing speed and machine type, wet or dry drawing.
4. Lubricant type and whether the die box is pressurized.
5. Required diameter tolerance and surface finish.
6. Expected monthly tonnage, so we can compare cost per ton.

Quality Control

Every die is checked for bore diameter, roundness, reduction angle, bearing length, nib bonding and bore surface before shipment.  Batch records are kept so a repeat order matches the previous die.

Custom Carbide Drawing Dies: Order Process

1. Send your wire data or drawing, or a sample die.
2. Our engineers confirm grade, geometry and casing and send a quotation with drawing.
3. We produce and inspect the dies. Typical lead time is 7 days; minimum order is 10 pcs.
4. Dies ship in protective packaging, with an inspection report on request.

We also supply dies together with our wire drawing machines, so machine and die are matched from the start.

Extending Carbide Die Life: Wear Signs, Reworking and Care

Three signs show a die is wearing out: the wire diameter drifts toward the upper tolerance, a ring or groove forms in the bearing, and drawing force or temperature rises. Catch wear early, because the less material that has to be removed to restore the bore, the more times the die can be reworked. When a die is re-lapped, the reduction angle must stay accurate, since even a small deviation can cut its life sharply. Keep lubricant clean and at the right concentration, align the wire so it enters on the die axis, and avoid wire breaks and sudden starts that load the nib.

Tungsten Carbide Drawing Die FAQ

1. What is a tungsten carbide wire drawing die?

It is a drawing die whose working nib is cemented tungsten carbide, made of tungsten carbide grains bonded with cobalt. Wire is pulled through its polished bore to reduce diameter and set the final size.

2. How do I choose between low-cobalt and high-cobalt carbide?

Low cobalt gives higher hardness and wear resistance, which suits fine and hard wire. Higher cobalt gives more toughness, which suits large, coarse wire and heavy reductions. Medium cobalt is the general-purpose choice. Tell us your wire and we will recommend a grade.

3. Tungsten carbide die or PCD die: which is more economical?

It depends on run length and wire. Compare cost per ton drawn, including changeover downtime. Carbide is usually more economical for short and medium runs and early passes. PCD often wins on long runs of abrasive wire.

4. Can a worn carbide drawing die be repolished?

Often yes. A worn die can usually be re-lapped and polished to a slightly larger bore size and used again, provided the wear is not too deep and the reduction angle is restored accurately.

5. Which wire materials can tungsten carbide dies draw?

Carbon steel, stainless steel, copper, aluminum, alloy and plated wire. The grade and bore geometry are chosen to suit each material.

6. What information do you need to quote a carbide drawing die?

Wire material, incoming and finished diameter, drawing speed, wet or dry drawing, tolerance and expected volume. A drawing or sample die also works.

7. Do you supply carbide die blanks as well as finished dies?

Yes, we can supply carbide die blanks as well as finished die.

8. Do you make custom carbide wire drawing dies?

Yes. Grade, bore size, reduction angle, bearing length, casing and polish can all be specified. OEM/ODM availability.