ASTM A2/Cr5Mo1V Cold Work Tool Steel
Excellent wear resistance and hardness
ASTM A2's high carbon and chromium-molybdenum alloy design gives it excellent wear resistance and compressive strength. After quenching, the hardness can reach 60-62 HRC, which is suitable for high wear environments (such as stamping dies, shear blades). Its uniform carbide distribution further extends tool life and reduces maintenance frequency, which is particularly suitable for industrial scenarios that require long-term stability.
Flexible heat treatment process
ASTM A2 supports a variety of heat treatment schemes: the one-time hardening method (1020-1040°C quenching + low temperature tempering) can achieve high hardness (HRC ≥ 60), while the medium temperature quenching (1050°C) combined with high temperature tempering (500-520°C) balances hardness and toughness, reduces processing stress, and is suitable for precision wire cutting and titanium plating, significantly improving the overall performance of the mold.
Wide range of applications
From cold working dies (such as punches, drawing dies) to cutting tools (drills, taps), ASTM A2 has shown excellent performance. Its high toughness is also suitable for parts that withstand impact (such as hot pressing molds, wear-resistant guide rails), covering the automotive, electronics, hardware and other industries, combining economy and versatility.
- HONGXIN
- DAYE
- 30DAYS
- 8000TONS/MONTH
- Information
ASTM STM A2/JIS SKD12 Cold Worked Tool Steel
1. ASTM A2 Tool Steel Introduction
ASTM A2 is an air-cooled hardening cold working die steel, a high-carbon, high-chromium alloy tool steel known for its excellent wear resistance, toughness and heat treatment stability. Its chemical composition includes carbon (0.95-1.05%), chromium (4.75-5.50%), molybdenum (0.90-1.40%) and vanadium (0.15-0.50%). By optimizing the alloy ratio, it achieves high hardness and wear resistance, suitable for high-load cold working dies and cutting tools. After quenching and tempering, the hardness can reach 60-62 HRC, and the deformation is very small, which is especially suitable for mold manufacturing with complex geometries. ASTM A2 is widely used in die-casting dies, blanking dies, cold extrusion tools and precision tools. It has high strength and processing convenience, and is an ideal choice for medium and large-scale production.| Normalized ; Annealed ; Quenched ; Tempered | |||
| Surface condition | Black; Peeled; Polished; Machined; Grinded; Turned; Milled | ||
| Delivery condition | Forged; Hot rolled; Cold drawn | ||
| Test | Tensile strength, Yield strength, elongation, area of reduction, impact value, hardness, grain size, ultrasonic test, US inspection, magnetic particle testing, etc. | ||
| Payment terms | T/T;L/C;/Money gram/ Paypal | ||
| Trade terms | FOB; CIF; C&F; etc.. | ||
| Packing | Standard Packages, or as Customers Request | ||
| Delivery time | 30-45 days | ||
| Application | AISI A2 is suitable for applications such as Blanking dies, block and ring gauges, coining, cold forming, cold trimming and forming dies, cold shears, rolls, knurls and knurling tools, machine parts, mandrels, punches and punch plates, reamers, shear and slitter blades, stamping dies and threading tapes. | ||
2. ASTM A2 Tool Steel Supply Range
| Size | Round | Dia12-500mm |
| Plate/Flat/Block | Thickness 12mm-500mm | |
| Width 210mm-710mm | ||
| Process | EAF+LF+VD+Forged+Heat treatment(optional) |
3. ASTM A2 Tool Steel Chemical Composition & Global Equivalents
| Grade | C | Mn | P | S | Si | Cr | V | Mo | ||||||
| ASTM/A2/T30102 | 0.95 | 1.05 | 0.40 | 1.00 | 0.03 | 0.03 | 0.10 | 0.50 | 4.75 | 5.50 | 0.15 | 0.50 | 0.90 | 1.40 |
| 1.2363/ X100CrMoV5 | 0.95 | 1.05 | 0.40 | 0.80 | 0.03 | 0.03 | 0.10 | 0.40 | 4.80 | 5.50 | 0.15 | 0.35 | 0.90 | 1.20 |
| SKD12 | 0.95 | 1.05 | 0.40 | 0.80 | 0.03 | 0.03 | 0.10 | 0.40 | 4.80 | 5.50 | 0.15 | 0.35 | 0.90 | 1.20 |
| BA2 | 0.95 | 1.05 | 0.30 | 0.70 | 0.035 | 0.035 | . . . | 0.40 | 4.75 | 5.25 | 0.15 | 0.40 | 0.90 | 1.10 |
4. ASTM A2 Tool Steel Physical & Mechanical Properties
Physical Properties
| Property | Metric Units | Imperial Units |
|---|---|---|
| Density | 7.80 g/cm³ | 0.282 lb/in³ |
| Melting Point | ~1425°C | ~2600°F |
| Thermal Expansion (20-200°C) | 12.0×10⁻⁶/°C | 6.7 µin/in·°F |
| Thermal Conductivity (100°C) | 30.0 W/m·K | 208 in·lb/(hr·ft²·°F) |
Mechanical Properties
| Property | Metric Units | Imperial Units |
|---|---|---|
| Hardness (Quenched & Tempered) | 60-62 HRC | 60-62 HRC |
| Tensile Strength | 1850-2050 MPa | 268,000-297,000 psi |
| Impact Toughness (Charpy) | 20-30 J | 15-22 ft-lb |
5. ASTM A2 Tool Steel Heat Treatment
Stress relieving
After heavy grinding or machine it is advisable to stress relieve tool steel A2 to reduce the danger of cracking or distortion during subsequent heat treatments. Heat slowly to 670-700°C, soak for a minimum of two hours per 25mm of section then cool down in the furnace.
Annealing
To prevent decarburization use a controlled atmosphere furnace or pack in a sealed container using some inert material. To anneal A2 tool steel for lowest hardness, heat slowly to 899°C(1650°F) and hold at this temperature for about two hours per inch of greatest cross-section. Cool steel A2 at a rate of 20°F (10°C) per hour to 650°C (1200°F) and reheat to 732°C (1350°F); hold 3 hours per inch of greatest cross-section; furnace cool at 20 degrees per hour to 593°C (1100°F); then furnace-cool to 482°C (900°F) and air-cool.
Hardening
Preheating temperature: 1200–1380°F (650–750°C). Austenitizing temperature: 1700 –1780°F (925–970°C) but usually 1720–1760°F (940–960°C).
Tempering
Choose the tempering temperature according to the hardness required by reference to the tempering graph.
Heat uniformly and thoroughly to the desired temperature and hold for 25 minutes per cm of thickness. Tool steel A2 can be double tempering, after intermediate cooling to room temperature. Temper at 200°C for a balance of hardness and strength or 350°C where strength is more important than hardness. A minimum holding time of 2 hours per inch of greatest cross-section should be used.
Quenching
Martempering bath or fluidized bed at 360–430°F (180–220°C) or 840–1020°F (450–550°C) then cool in air
Circulating air or atmosphere
Vacuum furnace with overpressure of gas at cooling
Oil (only for small and uncomplicated tools)
6. ASTM A2 Tool Steel Applications
ASTM A2 steel excels in high-wear and precision cold work applications:
Cold Work Dies: Blanking dies, forming tools, and trim dies for sheet metal.
Cutting Tools: Slitting blades, punches, and precision gauges.
Industrial Components: High-wear bushings, guide rails, and fixtures.
Plastic Molds: High-hardness inserts requiring wear resistance.
Why Choose ASTM A2?
Air-hardening capability reduces distortion, ideal for complex geometries.
Balanced toughness and wear resistance for long tool lifespan.
7. Key Advantages of ASTM A2 Steel
Air-Hardening Efficiency: Minimizes warping during hardening, suitable for intricate tools.
High Wear Resistance: Chromium-carbide formation ensures durability in abrasive environments.
Versatility: Adaptable to both low-temperature and high-stress applications.
8. Delivery condition
For hot forged or hot rolled bar, usually the delivery condition is hot forged or rolled, annealed, rough turned.
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
Q1:Are you trading company or manufacturer ?
We are the biggest tool steel factory at 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.
