A-10 Air Hardening Tool Steel


A-10 is an air hardening, non-deforming tool steel with outstanding wear resistance and toughness properties. This grade contains uniformly distributed graphitic particles for good machinability and non-seizing characteristics.

Analysis:

C CO CR MN MO NI P S SI V W
1.25 - 1.50 1.60 - 2.101.25 - 1.751.55 - 2.05 1.00 - 1.50

Size Availability:

Flats • Hollowbar • Metric • Non-Standard • Rounds • Squares • Standard

Applications:

ArborsBlanking DiesForming Rolls
GaugesPunchesShear Blades
SlidesTrimming Dies

Designations:

ASTM A681-US
FED QQ-T-570-US
AISI A10 Air Hardening Tool Steel-US

TreatmentTemperature RangeCooling/QuenchingNotes
Forging1900-1950° FSlow.Do not forge below 1500° F
Annealing1450° FFurnace cool at 10-15° F per hour. Maximum to 1000° F or less, then aircool or furnace cool.Protect from decarburization by packing in stainless steel foil or use controlled atmosphere furnace.
Stress Relieving1200-1250° FCool slowlyHold for one hour per inch of thickness with a 2 hour minimum Stress relieve after rough machining
Preheating1200-1250° F
Hardening1450-1500° FAir cool to under 100° F for maximum hardness responseHeat slowly until thoroughly and uniformly heated. Best results are obtained by austenitizing in vacuum or atmosphere furnaces.
Tempering(See Chart)Air.Heat slowly to the tempering temperature. Hold for one hour per inch of thickness. 300-500° F is the most widely used range.
Data is typical and should not be construed as actual values for any category.
Applications and technical information require engineers and tool designers to exercise independent judgement.