AISI O1 Cold Work Tool Steel
Precision Hardening with Minimal Distortion
AISI O1’s oil-quenching process ensures uniform hardness (57-63 HRC) with minimal warping, critical for tools requiring tight tolerances, such as precision gauges and injection molds.
Superior Machinability
In the annealed state (≤229 HB), O1 exhibits excellent grindability and polishability, enabling complex geometries for custom tools like thread-rolling dies and industrial knives.
Cost-Effective Durability
AISI O1 provides 30% longer tool lifespan than low-carbon steels in abrasive environments, reducing replacement costs for applications like stamping dies and shear blades.
- HONGXIN
- 中国
- 30DAYS
- 8000TONS/MONTH
- Information
AISI O1/DIN 1.2510 Cold Work Tool Steel
1. AISI O1 Tool Steel Introduction
AISI O1 is a low-alloy oil-hardening tool steel renowned for its exceptional hardness (57-63 HRC), dimensional stability, and cost-effectiveness. With a composition of 0.85-1.00% carbon, 1.00-1.40% manganese, and 0.40-0.70% chromium, it forms a fine-grained structure optimized for precision tooling. Its oil-quenching process minimizes distortion, making it ideal for applications like stamping dies, cutting tools, and gauges. Widely used in automotive, manufacturing, and tooling industries, AISI O1 balances performance and affordability, offering extended tool lifespan in medium-duty environments.
2. AISI O1 Tool Steel Supply Range
| Size | Round | Dia 8-350mm |
Plate/Flat/Block | Thickness 2mm-300mm | |
| Width 200mm-800mm |
3. AISI O1 Tool Steel Standards & Global Equivalents
| Grade | C | Si | Mn | P | S | Cr | V | Mo | W |
| AISI/O1 | 0.85-1.0 | 0.1-0.5 | 1.0-1.4 | 0.03 | 0.03 | 0.4-0.7 | 0.3 | / | 0.4-0.6 |
| DIN/1.2510 | 0.9-1.05 | 0.15-0.35 | 1.0-1.2 | 0.03 | 0.03 | 0.5-0.7 | 0.05-0.15 | / | 0.5-0.7 |
| JISG/SKS3 | 0.9-1.0 | 0.35 | 0.9-1.2 | 0.03 | 0.03 | 0.5-1.0 | / | / | 0.5-1.0 |
4. AISI O1 Tool Steel Physical & Mechanical Properties
Physical Properties
| Property | Metric Units |
|---|---|
| Density | 7.85 g/cm³ |
| Thermal Conductivity | 32.0 W/m·K (20°C) |
| Linear Thermal Expansion (20-260°C) | 10.6 μm/m·K |
Mechanical Properties
| Property | Metric Units |
|---|---|
| Hardness (Quenched & Tempered) | 57-63 HRC |
| Tensile Strength | 1690 MPa |
| Yield Strength | 1500 MPa |
| Impact Toughness | Moderate |
Thermal Stability: Retains hardness up to 400°C, suitable for moderate high-temperature applications.
5. AISI O1 Tool Steel Heat Treatment
Annealing: Heat to 760-790°C, slow cool at ≤22°C/h. Final hardness: ≤229 HB.
Quenching: Oil quench from 790-815°C to achieve 63-65 HRC.
Tempering: Temper at 175-260°C to stabilize hardness (57-63 HRC). Double tempering recommended for stress relief.
6. AISI O1 Tool Steel Applications
AISI O1 steel is a top choice for precision tooling due to its exceptional machinability and wear resistance:
Cutting Tools: Blades, drills, and precision engraving tools.
Cold Work Dies: Blanking dies, forming dies, and stamping tools.
Measuring Instruments: Gauges, fixtures, and high-precision molds.
Woodworking Tools: Chisels, plane blades, and carving tools.
Why Choose AISI O1?
Superior grindability and polishability compared to high-alloy steels.
Cost-effective for small to medium-batch production.
7. Key Advantages of AISI O1 Steel
Machinability: AISI O1 steel is easy to machine in the annealed state, reducing tool wear during fabrication.
Uniform Hardness: Oil quenching ensures minimal distortion and consistent hardness.
Versatility: Suitable for both intricate tools and heavy-duty dies.
8. Delivery condition
For hot forged bar, usually the delivery condition is hot forged, annealed rough turned/Black surface.
For hot rolled bar, usually the delivery condition is hot rolled, annealed, Black surface.
For hot forged plate, usually the delivery condition is hot forged, annealed, milled surface
For hot rolled plate, usually the delivery condition is hot rolled, annealed, black surface.
Hongxin Mold Tech Co.,Ltd. owns 1 set of Hot Rolling Production Line at size range flats 8-80*210-710mm, rounds 16-50mm Dia.
12 sets of Hydraulic Forging Hammers from Power 560kgs to 6000kgs which could cover flats 40-300*210-710mm.
8 sets of EF+LF+VD
5 sets of ESR
9 sets of Milling Machines
10 sets of Turning Lathes
6 sets of Precision Milling Machines.
CERTIFICATION: GB/T19001-2016/ISO9001:2015
Products' List
Packaging&Shipping
Q1: Are you trading company or manufacturer ?
We are the largest tool steel manufacturer in Daye & Huangshi. We can provide a wide range of steel products.
Q2: What is alloy steel round bar export packing?
Usually bundling for large diameter,small diameter bars in bulk or as customer's demand.
Q3: What is your MOQ?
We accept small order,if it is stock,any quantities can be accepted.
Q4: What is your lead time?
Depends actual order,around 20-35 days,or negotiation.
Q5: Can you supply sample?
Yes,we can.Sample fee according to your size.
Q6: What certificates do you have?
ISO, ABS, BV, CCS, Dnv, Lr, Gl, Mill Certificate
Q7: How can I get your quotation as soon as possible?
The email and fax will be checked within 24 hours,meanwhile,the Skype,Wechat and WhatsApp will be online in 24 hours.Please send us your requirement,we will work out a best price soon.
