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Home  ꄲ  Products  ꄲ  ALTA A8 Modified Steel Specification

Cold work tool steel

ALTA A8 Modified Tool Steel Specification

Steel properties

ALTA A8 Mod. steel (8% Cr -chromium steels) is a modified version of AISI A8 steel, by replacing high W% with intermediate V%, this improves the toughness of steel to a certain extent. Meanwhile, increased chromium to be around 8%, its wear resistance get improved very much.
It can be used in situations where chipper steels like 1.2360, 1.2362 are insufficient in terms of wear resistance and tool steels like 1.2379, D2, SKD11 do not have sufficient toughness. ALTA A8-modified steel is perfect for making industrial knives for the wood-working industry. It's also used for stamping and cutting tools etc.

Applications

² Wood chipper knives, shredding knives, planner knives

² Plastic granulator knives

² Slitter knives, scrap shears, shear blades

² Fine blanking dies, stamping dies, punches

² Cold forming tools/dies

Chemical composition

Chemical Composition per %

 

C

Si

Mn

P

S

Cr

Mo

V

Ni

Cu

Min.

0.48

0.90

0.35

 

 

7.95

1.35

0.40

 

 

Max.

0.55

1.00

0.50

0.025

0.015

8.05

1.45

0.50

0.25

0.25

Basic melting process :

IM/EAF + LF + VD + (ESR)

 

Hardness :

Max 230 HB (annealed)

Reduction ratio :

5 : 1 minimum or required

Grain size :

≥ 6.0 per ASTM E112

Non-metallic inclusion :

≤ 1.0 (thick), ≤ 1.5 (thin) per ASTM E45 method A (more pure by ESR route)

Ultrasonic Test

SEP1921, EN 10308, ASTM A388 or agreed methods

Macro-structure

As per ASTM E381

Straightness / flatness

≤ 1.5 mm / m (machined), ≤ 2.5 mm / m (black)

Tolerance

Per discussed

Size range (round bars)

Ø 12 - 500 mm

Size range (flats, plates)

8 - 400 mm in thickness

max. 1100 mm in width

Heat treatment

Annealing

Temperature(°C)

Hardness

820 - 870

max. 230 HB

 

Hot-forming

Temperature(°C)

1090 - 1150

 

Hardening and tempering

Quenching temperature(°C)

Quenching medium

Frequently-used tempering temperature(°C)

1010 - 1060

Oil or air-cooled

150 - 500

 

Downloads

  • 2024-06-25 Alta A8-Modified SPEC (011 - S6 - T1 ).pdf

    끂65 243.04 KB

Product images

넳 넲

Features

² High wear resistance

² Good toughness

² Excellent dimensional stability

Copyright © 2024 Alta Special Steel all right reserved

Contact

  • Huangshi Alta Special Steel Co.,Ltd
  • No.86 Road Hexi, Xisaishan Industrial park, Huangshi, China
  • +86 714 6318 297
  • sales@altaspecialsteel.com

News/Blog

  • 2024-09-04
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    Rerserach on Microstructure and Properties of Cr12MoV after Heat Treatment

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