ASTM A681 Steel Grade AISI O2 , Cold Work Tool Steel Round Bars

Delivery Time:3-5 days
Certification:CE,FCC,MSDS

ASTM A681 Steel Grade AISI O2 , Cold Work Tool Steel Round Bars

◆ Equivalence

AISI / SAE	DIN / W.Nr	JIS	GB
O2	1.2842	----	9Mn2V+Cr

◆ Chemical Composition (%)

C	Si	Mn	P	S	Cr	Mo	V
0.85 0.95	≤ 0.50	1.40 1.80	≤ 0.030	≤ 0.030	≤ 0.50	≤ 0.30	≤ 0.30

◆ Dimensions

	Hot Rolled	Forged
Diameter (mm)	10-130	60-400
Length (mm)	2000-5800	2000-5800

◆ Delivery Condition

EAF+(ESR) or EAF+LF+VD+(ESR), Hot rolled or Forged, Spheroidizing Annealed, Hardness≤220HB, Black surface or Machined surface (Peeled, Turned, Grinded),

UT 100% Passed

◆ Characteristics

1. Cold work tool steel with high dimensional stability at heat treatment.

2. Very high cracking resistance. High machinability, medium thoughness and wear resistance. 

◆ Applications

Tools (punches) and dies for blanking, punching and similar operations; threading and

wood working tools, machine knives for the pulp, paper and metal working industries; measuring tools and plastic mould dies.

◆ Heat Treatment

Annealing

680 to 720°C

Slow controlled cooling in furnace at a rate of 10 to 20°C/hr down to approx. 600°C,

further cooling in air.

Hardness af ter annealing: Max. 220 HB.

Stress relieving

Approx. 650°C

Slow cooling in furnace; intended to relieve stresses set up by extensive machining,

or in complex shapes.

After through heating, hold in neutral atmosphere for 1-2 hours.