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AISI A-2 Details

ADVANTAGES:
Good combination of wear resistance and toughness. Very stable in heat treatment.
Not difficult to machine or grind.
Good Hardenability.
AVAILABILITY
Readily available
MACHINABILITY
A-2 can be machined readily in the fully annealed condition. Its machinability rating is about 65% of a 1% carbon tool steel. It also has a high grindability rating.
ANNEALING
Heat slowly to 1500 to 1600°F and furnace cool, allowing the temperature to drop about 75°Fper hour to 1000°F. Then air cool. The annealed hardness is 202 to 248 Brinell.

HARDENING

A-2 should be preheated at 1200° to 1300°F then taken up to 1725° to 1750°F. When part is at temperature it should be soaked 30 minutes for the first inch of thickness and 15 minutes for each inch of thickness over one inch. If a controlled atmosphere or vacuum furnace is not available then part should be wrapped in stainless foil to prevent decarburization. When the piece is taken from the furnace the stainless foil must be removed (if applicable) and then cooled in still air. Large pieces may require forced air.

TEMPERING

As soon as pieces have been cooled to room temperature (100° to 125°F) tempering must begin. Heat slowly to the tempering temperature selected to obtain the hardness desired. Double tempering is recommended.

AISI A-2  Tempering Temperature


AISI A-2 Standard Download

Tags

A-2 Application:Applied to the thermosetting plastic mold, the hardened mould as a whole
Category Type Grade Designations
Grades Tool Steels & Die Steels A-2 USA - AISI ,
Chemical composition(mass fraction)(wt.%)
Elements Min.(≥) Max.(≤)
C 0.95 1.05
Si - 1.00
Mn - 0.50
Cr 4.75 5.50
Mo 0.90 1.40
V 0.15 0.50
Ni - 0.30
Mechanical properties of grade A-2
Proof strength
Rp0.2 (MPa)
Tensile strength
Rm (MPa)
Impact energy
KV (J)
Elongation at fracture
A (%)
Reduction in cross section on fracture
Z (%)
As-Heat-Treated Condition Brinell hardness (HBW)
429 (≥) 231 (≥) 34 21 34 Solution and Aging, Annealing, Ausaging, Q+T,etc 132
Physical properties of grade A-2
Property Density
kg/dm3
Temperature T
°C/F
Specific heat
J / kgK
Thermal conductivity
W/mK
Electric resistance
µΩ·cm
Modulus of elasticity
kN/mm2
Expansion rate
159 (≥) 835 (≥) 43 24 21 Solution and Aging, Annealing, Ausaging, Q+T,etc 332
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
497 822 883
A-2 Range of products
Product type Products Dimension Processes Deliver Status
Plates / Sheets Plates / Sheets 0.08-200mm(T)*W*L Forging, hot rolling and cold rolling Annealed, Solution and Aging, Q+T, ACID-WASHED, Shot Blasting
Steel Bar Round Bar, Flat Bar, Square Bar Φ8-1200mm*L Forging, hot rolling and cold rolling, Cast Black, Rough Turning, Shot Blasting,
Coil / Strip Steel Coil /Steel Strip 0.03-16.0x1200mm Cold-Rolled & Hot-Rolled Annealed, Solution and Aging, Q+T, ACID-WASHED, Shot Blasting
Pipes / Tubes Seamless Pipes/Tubes, Welded Pipes/Tubes OD:6-219mm x WT:0.5-20.0mm Hot extrusion, Cold Drawn, Welded Annealed, Solution and Aging, Q+T, ACID-WASHED
Cross Reference Table(Equivalent Grade)
Grade Standard Country Application
A-2 AISI USA
Applied to the thermosetting plastic mold, the hardened mould as a whole
HEV7 UNS USA
Steel for exhaust valves

Relevant products

A-2 Equivalent Grade Stock

Steel grade Dimension Shape Unit Quantity Delivery state Query
IncoloyA-286 / GH 2132 Stock Φ8-65mm*L Round Bar Kgs 489 Hot-Rolled+Annealed+black Enquiry

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