ASTM A681 O1 steel is a low alloy tool steel,
cold work mold steel. It must be hardened by quenching in oil. The UNS number of O1 material is T31501. O1 alloy is a general purpose oil hardening tool steel with easy machinability and good dimensional stability in heat treatment.
ASTM A681 specification covers the chemical, mechanical, and physical requirements for available wrought alloy tool steel products, which include hot or cold finished steel bar, steel plate, steel sheet, strip, rod, wire, or forgings etc. O1 low alloy tool steel is a general-purpose tool steel that is typically used in applications where alloy steels cannot provide sufficient hardness, strength, and wear resistance.
ASTM A681 O1 Mold Steel Chemical Requirement, %
| C |
Mn |
P |
S |
Si |
Cr |
V |
Wu |
| 0.85-1.00 |
1.00-1.40 |
≤0.030 |
≤0.030 |
0.10-0.50 |
0.40-0.70 |
≤0.30 |
0.40-0.60 |
ASTM A681 O1 Mold Steel Physical Properties
Density: 7833 kg/m3
Specific Gravity: 7.83
Modulus of Elasticity: 31 x 106 psi (214GPa)
Machinability: 85-90% of a 1% carbon steel
Maximum Brinell Hardness in Annealed or Cold-Drawn Condition
| Type |
Annealed
BHN |
Cold drawn
BHN |
| O1 |
212 |
241 |
Application of ASTM A681 O1 Tool Steel
ASTM A681 O1 oil quenching tool steels are used for long run tooling applications, where wear resistance is important, such as blanking or forming dies and thread rolling dies. A681 O1 tool steel can apply to Punching die, molding die, stamping die, blades, heading tools, long punch, forming roller, grinding roll, master the tools, ball, punch, perplexing extrusion die, drawing die, compound die, thread rolling die, Shear Blades.
Shanghai Katalor is a China supplier of ASTM A681 O1 cold work mold steel products. We can provide ASTM A681 O1 tool steel, O1 low alloy steel, ASTM O1 round bars, A681 O1 steel flats with high quality. Welcome to come and visit our factory if you are interested in O1 oil quenching tool steel.
