A2 Tool Steel

grade 5 titanium material cnc

At a Glance

Process

Lead Time

Finish options

Tolerance

Price

Applications

As fast as 7 days
With drawing: as low as +/- 0.005 mm
No drawing: ISO 2768 medium
$$$
Tools, fixtures, tool holders, punches

About the Material

A2 Tool Steel offers excellent wear resistance and toughness. Due to its high compressive strength and dimensional stability, this material is commonly used to make fixtures, tools, tool holders, gauges and punches.

Material Properties

Yield Strength

Elongation at Break

Hardness

Density

McMaster Part Number

55,000 PSI
22%
Rockwell B90
0.284 lbs / cu. in

Material Finish

Very similar to other grades of mild steel, tool steel is generally shiny in appearance and slightly darker than aluminum alloys. For corrosion resistance, black oxide can be applied post-machining. To achieve a variety of surface finishes, tool steel parts can also be media blasted or tumbled.

Design Recommendations

Min Wall Thickness

Min End Mill Size

Min Drill Size

Max Part Size

Undercuts

Radii : Depth

0.5 mm
0.8 mm
(0.03 in)
0.5 mm
(0.02 in)
1200 x 500 x 152 mm [x,y,z] (mill) 
152 x 394 mm 
[d,h] (lathe)
Square profile, full radius, dovetail profiles
Depth must not exceed 12x drill bit diameter.
For end mills, depth must not exceed 10x tool diameter.

Related Resources

Engineer's Guide to CNC Machining for Prototyping Hardware
Fictiv CNC Material Datasheet