A2 Product Guide

Applications | Specifications | Mechanical and Chemical Data | Tolerances

Overview

An air-hardening tool steel with good strength and with excellent stability in heat treatment. A-2 exhibits wear resistance that falls between O-1 and D-2 steel. Typically used in punches, dies, cutting tools in woodworking, tooling for plastic, dowel pins, hammers, and industrial knives.

Common Trade Names

UNS T30102, AISI Type A2, AISI Medium-Alloy, Air-Hardening Tool Steels A2, Air-True

Other Resources

Weight Calculator | Mill Test Reports

Products

A2 Drill Rod | A2 Rectangle Bar | A2 Square Bar

Applications

Dowel Pins
Blades
Punches
Dies
Tooling
Hammers

Specifications

ASTM	SAE
A681	J437

Hardness	Heat Treat Temp.	Quench Medium	Applications	Advantages
A-2 Tool Steel Heat Treatment
As Shipped: Rockwell 94-99B After Heat Treating: Rockwell 59-62C	1700°-1900°F	Air	A2 can be used in the same applications as both O1 and W1.	The heat-treated air-hardening steels have deeper hardenability and there is less movement or distortion during heat treatment.

	Annealed	Hardened
Physical Properties A2
Density	0.284 lb/in3	0.284 lb/in3
Ultimate Tensile Strength	100 ksi	300 ksi
Yield Tensile Strength	50 ksi	N/A
Shear Modulus	11,300 ksi	11,300 ksi
Shear Strength	65 ksi	N/A
Fatigue Strength	35 ksi	N/A
Hardness Rockwell \| Brinell	B94-99 \| 200-235	C59-62 \| 634-688
Elongation at Break Percentage	21%	N/A
Modulus of Elasticity	29,400 ksi	29,400 ksi
Poisson's Ratio	0.30	0.30
Machinability Percentage	65%	65%
Melting Point	2,570-2,650 °F	2,570-2,650 °F
Specific Heat	1.1 x 10^-1 BTU/lb-°F	1.1 x 10^-1 BTU/lb-°F
Thermal Conductivity	264 BTU-in/hr-ft^2-°F	264 BTU-in/hr-ft^2-°F
Electrical Conductivity	8.2% IACS	8.2% IACS

Chemistry Information
Element	Percentage
C	0.95 - 1.05
Cr	5.13
Fe	91
Mn	1 max
Mo	1.15
P	0.03 max
Si	0.5 max
S	0.03 max
V	0.33

Open for Orders 24/7!