Tool Steel Machining Services

Precision Machining for High-Strength Tool Steel Components
Custom Prototypes & Production with Advanced CNC Capabilities

What is Tool Steel CNC Machining?

Tool steel CNC machining focuses on high-carbon and alloy steels engineered for wear resistance, hardness, and toughness. Typical grades include O1/A2/D2 for cold work, H13 for hot work, S7 for shock resistance, and P20 for mold bases.

Tooling: Fine-grain carbide, tough coatings (TiAlN/TiCN) to handle abrasion and heat.
Coolant: Flood or high-pressure coolant; through-tool preferred for deep features.
Feeds/Speeds: Maintain chip load—avoid rubbing to limit work-hardening and edge chipping.
Rigidity: Rigid fixturing + short stick-out = better surface and dimensional control.

Tool steel CNC machining overview with carbide end mill and flood coolant

Tool steel heat-treatment stages: annealed, pre-hardened, hardened & tempered

Why Tool Steel Is Challenging?

High hardness and abrasion resistance make chip formation tougher—tools wear fast and heat builds quickly. Picking the right condition matters: annealed for roughing/forming, pre-hardened for bases, hardened & tempered for long-life tooling.

For best stability: rough in soft/annealed state → stress-relieve → harden/temper → finish by hard-milling, grinding, or EDM.

Precision Tool Steel CNC Machining

3, 4, 5-Axis CNC Milling

Multi-axis machining for complex cavities, ribs, and hard-milling. Rigid setups, balanced holders, and coated carbide deliver clean walls and consistent geometry in both annealed and hardened tool steels.

Tool steel CNC turning and mill-turn of shafts and cores

CNC Turning & Mill-Turn

From punches and sleeves to core pins and shafts, combined turning + milling in one setup improves concentricity, finish, and lead time—ideal for prototype to production.

Tool Steel CNC Machining Capabilities

Feature	Detail
Max Part Size (X/Y/Z)	2300 × 1500 × 600 mm
Minimum Feature Size	⌀1 mm
Wall Thickness	0.25 mm
Tolerance	±0.005 mm
Surface Finish (as milled)	Ra 0.4–3.2 µm
Standard Lead Time	3 working-days for rapid prototyping
Pricing Level	To be confirmed after design review
Type of Machine	Gantry CNC / 3-4-5-Axis CNC / Mill-Turn Compound CNC / Swiss-Type CNC / Turning Machine...etc...
Tool Steel Grades	O1 (Oil-Hardening), A2 (Air-Hardening), D2 (High-Carbon/High-Chromium), H13 (Hot-Work)

Tool Steel Grades

Common grades for cold work, hot work, shock-resistant, and mold tooling. Need a specific spec? Contact us.

O1 (Oil-Hardening) A2 (Air-Hardening) D2 (High-Carbon/High-Chromium) H13 (Hot-Work)

O1 (Oil-Hardening)

Good wear resistance; fine detail capability
Machines well in annealed state
Harden in oil; temper for target HRC
General punches, dies, fixtures

Rough/slot in annealed → heat treat → finish mill/grind for final fit.

A2 (Air-Hardening)

Balanced wear/toughness; stable on heat treat
Hard-milling feasible; low distortion
Cold-work dies, form tools, gauges
Common shop standard grade

Air-hardening minimizes distortion—great for tight-tolerance tools after HT.

D2 (High-Carbon/High-Chromium)

Very high wear resistance; abrasion-intense cuts
Harder to machine—use coated carbide
Blanking dies, wear inserts, shear blades
Consider EDM/grinding for finish

Plan for lower SFM, aggressive coolant, and rigid workholding to protect edges.

H13 (Hot-Work)

High hot-strength; thermal fatigue resistance
Die-casting dies, hot runners, cores
Pre-hard & hardened options
Finish via hard-milling, EDM, polish

Use through-coolant and stable holders; step down to control heat and burrs.

Display of Our CNC Machining Tool Steel Parts

Tool steel CNC machined die insert with mirror-milled cavity

Tool steel CNC machined fixture plate with reamed holes and threads

Tool steel CNC machined mold core with polished surfaces

Tool steel CNC machined punch with sharp edges and tight tolerances

Material Machining Guide

Tool Steel CNC Machining: Selection, Process, and Quality Notes

Tool Steel is commonly considered for fixtures, tooling, wear plates, punches, dies, and hardened components. It is selected because of hardness, wear resistance, and dimensional stability. For CNC machining, the final result depends on material grade, toolpath strategy, tolerance allocation, surface finish, and inspection planning.

Good Fit

Use Tool Steel when the application benefits from hardness, wear resistance, and dimensional stability and the design can be machined with stable workholding.

Watch Points

Confirm wall thickness, hole depth, thread callouts, burr control, cosmetic surfaces, and finish buildup before production.

Quality Planning

Define critical dimensions, inspection method, tolerance class, and documentation requirements before the first article.

Topic	Practical Guidance for Tool Steel
Design review	Send 3D CAD, 2D drawings, material grade, finish notes, quantity, and critical-to-function dimensions.
Machining process	MTSPi can review whether milling, turning, drilling, tapping, boring, or a combined route is best for the geometry.
Surface finish	Plan cosmetic and functional finishing early, especially where coating thickness, polishing, or deburring affects fit.
Inspection	Use calipers, micrometers, gauges, CMM, or visual inspection based on tolerance risk and assembly function.

Related Material Choices

Compare Tool Steel With Nearby CNC Materials

Aluminumexcellent machinability, low weight, good corrosion resistance Alloybroad grade selection and strong mechanical performance Titaniumhigh strength-to-weight ratio and excellent corrosion resistance Nickelstrong performance in high-temperature and corrosive environments Stainless Steeldurability, corrosion resistance, and clean appearance Alloy Steelstrength, toughness, and heat-treatment response Carbon Steelgood strength and economical machining Brassexcellent machinability and good corrosion resistance Copperhigh electrical and thermal conductivity Bronzewear resistance, low friction, and corrosion resistance

FAQ

Is Tool Steel suitable for CNC machining?

Yes, Tool Steel can be CNC machined when the grade, geometry, tooling, workholding, and tolerance requirements are planned correctly.

What should I send for a Tool Steel machining quote?

Send CAD files, 2D drawings, quantity, material grade, finish requirements, tolerance notes, and any inspection or packaging needs.

Can Tool Steel parts be finished after machining?

Often yes. The right finish depends on the material family and part function. Confirm finish thickness and cosmetic expectations before machining.

How do I reduce cost on Tool Steel CNC parts?

Use practical tolerances, avoid unnecessary deep pockets or tiny holes, simplify setups, and reserve tight control for functional features.

CNC Metal MaterialsReturn to the material category page. CNC Materials LibraryCompare all metals and plastics. Surface TreatmentChoose finishing options for machined parts. Request a QuoteSend files for manufacturability review.

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