The Best Tool Steels for Deep Drawing Dies

The best tool steels for deep drawing dies are D2/1.2379/SKD11, A2/1.2363/SKD12, O1/1.2510, O2/1.2842, O6, M2/1.3343/SKH51, and M4. The right choice depends on production volume, sheet material, drawing severity, and the die’s failure mode. For long-run dies with abrasive wear, D2 is usually the first choice. For better toughness and dimensional stability, A2 is more suitable. For short- to medium-production runs, O1 and O2 can work well. When galling, material pickup, or severe sliding wear becomes the main problem, O6, M2, or M4 may perform better.

Quick Selection Guide for Deep Drawing Die Steel

The table below provides a quick answer to common deep-drawing die conditions. It helps compare tool steels by wear resistance, toughness, galling risk, production volume, and drawing severity.

D2 is not always better than A2. M2 is not always necessary. O1 is not always too weak. The correct steel depends on how the die works and how it fails.

Equivalent Grades Used in Deep Drawing Dies

Deep drawing die steel may appear under different standard names. Buyers may search by AISI, DIN/W.Nr., JIS, or local equivalent grades. The table below helps connect the common names used when selecting deep-drawing die materials.

This table supports grade recognition. It should not replace the main selection rule. The die failure mode still decides the best material direction.

What Makes Deep Drawing Dies Difficult for Tool Steel?

Deep-drawing dies face high sliding friction, compressive loads, and surface contact pressure. The punch pushes the sheet metal into the die cavity, while the draw ring and blankholder control material flow. This creates wear, galling, cracking risk, and dimensional stability problems.

A deep drawing die steel must usually provide:

When Is D2 the Best Choice for Deep Drawing Dies?

D2 / 1.2379 / SKD11 is usually the best general choice when abrasive wear controls tool life, and the production run is long. It suits applications such as drawing punches, drawing rings, and high-friction working surfaces that require strong wear resistance and compressive strength.

D2 belongs to the high-carbon, high-chromium cold-work steel group. Its carbide-rich structure gives strong abrasion resistance and helps extend the interval between regrinding. This is why D2 is often selected for long-run deep drawing dies.

D2 does not solve every deep drawing problem. If the die chips, cracks, or galls during stainless steel drawing, the problem may not be abrasive wear. In that case, A2, M2, O6, or a lower-chromium tool steel may be a better direction.

Use D2 when the die wears gradually under repeated friction.
Replace D2 when the die fails by cracking, chipping, galling, or material pickup.

When Should You Choose A2 Instead of D2?

Choose A2 / 1.2363 / SKD12 instead of D2 when the deep-drawing die requires greater toughness, safer heat treatment, and better dimensional stability over maximum abrasive wear resistance.

A2 offers a balanced compromise between wear resistance and toughness. It is useful when the extreme wear resistance of D-series steel is not required, but the die still needs resistance to deformation and a reduced risk of cracking.

A2 is not simply a weaker D2. It solves a different problem. D2 focuses on wear. A2 focuses on balance.

Choose A2 when D2 is too crack-sensitive or when dimensional stability matters more.
Replace A2 with D2 when abrasive wear becomes the primary failure mode during extended production.

Are O1 and O2 Enough for Short-Run Deep Drawing Dies?

O1 / 1.2510 and O2 / 1.2842 can work for short- to medium-length production runs when the drawing conditions are moderate and extreme wear resistance is not required.

O-series steels provide useful hardness, sufficient toughness, and practical cost-effectiveness for many less-severe tooling applications. O1 and O2 can be used for deep drawing dies, punches, and related tooling. O2 may also be used for auxiliary parts such as ejectors and blankholders in some friction-heavy operations.

O1 and O2 become weak choices when production volume increases, wear becomes too fast, or heat-treatment distortion becomes a problem.

Use O1 or O2 when the job is short-run, simple, or moderate in severity.
Replace O1 or O2 with A2 or D2 when tool life, stability, or wear resistance becomes insufficient.

When Does O6 Make Sense for Galling Problems?

O6 makes sense for deep-drawing dies when the drawn sheet sticks to the punch, draw ring, or blankholder contact surface, leading to galling, material pickup, scratches, or poor surface finish. In this situation, the main problem is adhesive wear rather than simple abrasive wear.

O6 can help because its free graphite provides a built-in lubricating effect, reducing sliding friction during drawing. This makes it useful when galling becomes more serious than normal die wear.

O6 should not replace D2 in every long-run deep drawing die. If the punch or draw ring primarily fails due to abrasive wear, D2 or high-speed steel may still be preferable. O6 is more relevant when sticking, pickup, and surface damage are the main problems.

Use O6 when galling and material pickup are present on deep-drawing die contact surfaces.
Do not use O6 as the default answer when the main failure is long-run abrasive wear.

When Should You Upgrade to M2 / 1.3343 / SKH51 or M4?

Upgrade to M2 / 1.3343 / SKH51 or M4 when D2, A2, or O-series steels cannot provide enough wear resistance for severe deep drawing conditions.

High-speed steels such as M2 and M4 can handle severe drawing, abrasive sheet materials, high-pressure sliding contact, and demanding punch applications. M2 may also be considered when stainless steel drawing causes galling and material buildup, in which case D2 may not perform well.

M2 and M4 should not become default choices. If the drawing condition is not severe, D2 or A2 may provide better cost-performance.

Use M2 or M4 when severe wear, high pressure, or stainless steel galling makes ordinary cold-work steels insufficient.
Stick with D2 or A2 when the working conditions do not warrant high-speed steel.

What About W-Series Steels and Large Drawing Dies?

W-series steels such as W1, W2, and W5 may be used for simple, short-run drawing dies. They can provide a hard, wear-resistant outer case with a tougher core. W5 may be suitable for heavier stamping and drawing because chromium improves hardenability and wear resistance to some extent.

Their main weakness is heat-treatment risk. Water-hardening steels can distort or crack during quenching, especially in complex die shapes or uneven sections.

For very large drawing dies, solid tool steel may not be practical. Cast steel, gray cast iron, or ductile iron may be used for large die bodies, while high-wear surfaces may require hardened areas or tool-steel inserts.

This is a supporting point, not the main article’s focus. The main deep drawing die steel choices remain D2, A2, O1, O2, O6, M2, and M4.

When Should You Replace One Tool Steel with Another in Deep Drawing Dies?

A deep-drawing die should use a different tool steel when the current steel no longer matches the failure mode. Fast wear, chipping, cracking, galling, heat-treatment distortion, and increased production volume are the main reasons to change from one steel to another.

When Aobo Steel reviews a deep-drawing die material inquiry, the useful information includes the current die problem, the drawn sheet material, the production volume, the required size, and whether the die fails due to wear, cracking, galling, or distortion.

This replacement logic matters more than a simple steel ranking. If the die wears too quickly, move toward a higher-wear-resistance option. If the die cracks, move toward higher toughness. If the die galls, focus on adhesive wear. If the die distorts, choose a more stable hardening route.

Common Mistakes When Choosing Tool Steel for Deep Drawing Dies

The most common mistake is choosing based on a steel grade’s reputation rather than on failure mode. A harder or more expensive steel does not solve wear, cracking, galling, or distortion.

Aobo Steel often sees material discussions start with “Which grade is better?” A better question is: “How is the die failing?” That question leads to a more reliable choice of steel.

Conclusion

The best tool steels for deep drawing dies are D2 / 1.2379 / SKD11, A2 / 1.2363 / SKD12, O1 / 1.2510, O2 / 1.2842, O6, M2 / 1.3343 / SKH51, and M4. They do not solve the same problem. D2 works best for long-run abrasive wear. A2 performs better when toughness and dimensional stability are more important. O1 and O2 fit short to medium runs. O6 helps when galling and sliding wear dominate. M2 and M4 are suitable for severe drawing conditions.

The best selection method starts with the failure mode. If the die wears too fast, upgrade wear resistance. If it chips or cracks, improve toughness. If it galls, focus on adhesive wear resistance. If it distorts after heat treatment, choose a more stable air-hardening steel.