Bohler-Uddeholm AISI A2 Cold Work Tool Steel

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Bohler-Uddeholm AISI A2 Cold Work Tool Steel
Categories:	Metal; Ferrous Metal; Alloy Steel; Tool Steel; Cold Work Steel
Material Notes:	Description: AISI A2 is an air- or oil hardening chromiummolybdenum-vanadium alloyed tool steel characterized by AISI A2 is characterized by: Good machinability High stability after hardening High compressive strength Good hardenability Good wear resistance Applications: AISI A2 takes a place in the Uddeholm tool steel range between AISI O1 and AISI D2, offering an excellent combination of good wear resistance and toughness. It may be regarded, therefore, as a “universal” cold work steel. For cutting operations the good toughness of AISI A2 gives excellent resistance to chipping of the cutting edge. In many cases tools made from this steel have given better tooling economy than high-carbon, high-chromium steels of the D3/W.-Nr. 2080 type. AISI A2 has much better machining and grinding properties.
Key Words:	AISI A2; W.-Nr. 1.2363
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Physical Properties	Original Value	Comments

Density	0.279 lb/in³	hardened to 62 HRC
	0.275 lb/in³ @Temperature 399 °C	hardened to 62 HRC
	0.277 lb/in³ @Temperature 191 °C	hardened to 62 HRC

Mechanical Properties	Original Value	Comments
Hardness, Brinell	215	Soft annealed
Modulus of Elasticity	27500 ksi	(hardened to 62 HRC)
	24600 ksi @Temperature 399 °C	hardened to 62 HRC
	26900 ksi @Temperature 191 °C	hardened to 62 HRC
Compressive Yield Strength	1350 MPa	0.2%, hardened to 50 HRC
	1800 MPa	0.2%, hardened to 55 HRC
	2150 MPa	0.2%, hardened to 60 HRC
	2200 MPa	0.2%, hardened to 62 HRC

Thermal Properties	Original Value	Comments
CTE, linear	6.50 µm/m-°C @Temperature 20.0 - 200 °C	hardened to 62 HRC
Specific Heat Capacity	0.110 BTU/lb-°F @Temperature 20.0 °C	hardened to 62 HRC
Thermal Conductivity	26.0 W/m-K @Temperature 20.0 °C	hardened to 62 HRC
	27.0 W/m-K @Temperature 191 °C	hardened to 62 HRC
	28.5 W/m-K @Temperature 399 °C	hardened to 62 HRC

Component Elements Properties	Original Value	Comments
Carbon, C	1.0 %
Chromium, Cr	5.3 %
Iron, Fe	91.5 %	As Balance
Manganese, Mn	0.60 %
Molybdenum, Mo	1.1 %
Silicon, Si	0.30 %
Vanadium, V	0.20 %

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NBUCOR20 / 15489

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