Aobo Steel supply H13 steel for your project
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What is H13 tool steel? It is an air-hardening hot work tool steel and is one of the most widely used steels among all hot work tool steels. Compared to H11 tool steel, this steel has higher thermal strength and hardness. Because it can be air-hardened, it has low quenching deformation and residual stress and a small tendency for surface oxidation. It can also produce secondary hardening, has good thermal stability, and can resist the erosion of aluminum alloy molten liquid.
This steel is widely used to manufacture hot extrusion dies and mandrels, forging dies for drop hammers, forging press dies, inserts for precision forging machines, and die-casting molds for aluminum, copper, and alloys.
The designation in the U.S. ASTM A681 system is H13, and the name in the American AISI system is AISI H13 steel. Similar designations in other national standards include ISO 40CrMoV5, Japan/JIS SKD61, USA/UNS T20813, Germany/DIN X40CrMoV5-1, Germany/W-Nr. 1.2344, and Czech Republic (CSN) 19554. In the following article, H13 steel is used as a substitute. In the following section, we will discuss the H13 tool steel properties.
Most cost-effective, high-quality supplier of D2 steel
We offer both D2 electric furnace steel and D2 ESR steel. Considering our customers’ purchasing costs, we produce D2 round bars with diameters under 200mm using the electric furnace method, which can meet Ultrasonic testing (UT) Sep 1921-84 D/d flaw detection. Customers can purchase high-standard D2 round bars at a lower cost. We adopt the ESR process for diameters above 200mm to ensure that the internal structure can meet Ultrasonic testing (UT) Sep 1921-84 E/e flaw detection.
Excellent D2 Forged Steel Supplier
Aobo Steel has over 20 years of experience in forging D2 steel, giving us a deep practical understanding of quality control in this field. Our D2 forged steel products mainly come in round bar, plate, and block shapes. We have over 40 suppliers providing the best processing services, enabling us to offer advantages such as short lead times, stable quality, and competitive prices.
Suply Range
The shapes of steel that Aobo Steel produces include D2 tool round bars and D2 plates.
| Shape | Size | Length | Surface finish | tolerance |
| round bar | diameter 20mm-400mm | length 2500mm-5800mm | black | 0/+5mm |
| peeled | 0/+5mm | |||
| turned(machined) | 0/+2mm | |||
| plate | width*thickness 100mm-800mm*10mm-400mm | length 2500mm-5800mm | black | 0/+5mm |
| peeled | 0/+5mm | |||
| turned(machined) | 0/+2mm |
H13 tool steel equivalent grades and chemical composition under different standards
| Standard Number | Grade | C (%) | Cr (%) | Mo (%) | Si (%) | V (%) | Mn (%) | P (%) | S (%) | Ni (%) | Cu (%) |
| ASTM A681:2007 | H13/T20813 | 0.32-0.45 | 4.75-5.50 | 1.10-1.75 | 0.80-1.20 | 0.80-1.20 | 0.20-0.60 | ≤0.030 | ≤0.030 | — | ≤0.75 |
| JIS G4404:2006 | SKD61 (X40CrMoV5-1) | 0.32-0.42 | 4.50-5.50 | 1.00-1.50 | 0.80-1.20 | 0.80-1.20 | 0.25-0.50 | ≤0.030 | ≤0.020 | ≤0.25 | ≤0.25 |
| ISO 4957:1999 | X40CrMoV5-1 | 0.35-0.42 | 4.80-5.50 | 1.10-1.50 | 0.80-1.20 | 0.85-1.15 | 0.20-0.50 | ≤0.030 | ≤0.020 | — | — |
| EN ISO 4957:2001 | X40CrMoV5-1, 1.2344 | 0.35-0.42 | 4.80-5.50 | 1.10-1.50 | 0.80-1.20 | 0.85-1.15 | 0.20-0.50 | ≤0.030 | ≤0.020 | — | — |
| GB/T 1299-2000 | 4Cr5MoSiV1/T20502 | 0.32-0.45 | 4.75-5.50 | 1.10-1.75 | 0.80-1.20 | 0.80-1.20 | 0.20-0.50 | ≤0.030 | ≤0.030 | — | ≤0.30 |
H13 tool steel physical properties
Critical Temperatures
| Critical Point | Ac1 | Ac3 | Ar1 | Ar3 | Ms | Mf |
|---|---|---|---|---|---|---|
| Temperature (Approx.)/℃ | 860 | 915 | 775 | 875 | 340 | 215 |
Linear Expansion Coefficient
| Temperature/℃ | 20 ~ 100 | 20 ~ 200 | 20 ~ 300 | 20 ~ 400 | 20 ~ 500 | 20 ~ 600 | 20 ~ 700 |
|---|---|---|---|---|---|---|---|
| Linear Expansion Coefficient α/×10-6℃-1 | 9.1 | 10.3 | 11.5 | 12.2 | 12.8 | 13.2 | 13.5 |
Thermal Conductivity
| Temperature/℃ | 250 | 650 |
|---|---|---|
| Thermal Conductivity λ/[W/(m·K)] | 32.2 | 28.8 |
Density and Elastic Modulus
| Property | Value |
|---|---|
| H13 tool steel density | 7.80 g/cm³ |
| Thermal Conductivity | 28 W/m·K at 100°C |
| H13 steel rockwell hardness (After Heat Treatment) | 50 – 54 HRC |
| Elastic Modulus | 210 GPa |
| Melting Point | 1425°C (2597°F) |
H13 Steel Heat Treatment
1. Pre-heating
a) Forging Process Specifications
| Item | Heating Temperature (°C) | Forging Temperature (°C) | Finishing Temperature (°C) | Cooling Method |
|---|---|---|---|---|
| Ingot | 1140-1180 | 1100-1150 | 900-850 | Slow cooling (sand or pit cooling) |
| Billet | 1120-1150 | 1050-1100 | 900-850 | Slow cooling (sand or pit cooling) |
b) Heat Treatment Process
| Pre-Heat Treatment Plan | Process Parameters |
| Annealing Process | Heating temperature: 860 ~ 890°C, hold for 3 ~ 4 hours, furnace cool to below 500°C and then air cool, hardness after annealing ≤229HBW, structure: spheroidized pearlite + a small amount of carbides |
| Stress Relief Annealing | Heating temperature: 730 ~ 760°C, hold for 3 ~ 4 hours, furnace cool |
c) Hardness and Microstructure Before and After Annealing
| Condition | Indentation Diameter (mm) | HBW | Microstructure |
|---|---|---|---|
| Before Annealing | ≈2.75 | ≈500 | Martensite or Bainite |
| After Annealing | ≥3.9 | ≥241 | Spheroidized Pearlite + Small Amount of Carbides |
2. Quenching
a)Recommended Tempering Process Specification
| Quenching Temperature (°C) | Cooling | Quenching Medium | Quenching Medium Temperature (°C) | Cooling to | Hardness (HRC) |
|---|---|---|---|---|---|
| 1020 ~ 1080 | Oil or Air | 20 ~ 60 | Room Temperature | 56 ~ 58 |
b)Relationship between quenching temperature, hardness, and grain size
| Quenching Temperature (°C) | 930 | 950 | 980 | 1000 | 1020 | 1040 | 1060 | 1080 | 1100 |
|---|---|---|---|---|---|---|---|---|---|
| Hardness (HRC) | 50.3 | 52 | 53.5 | 54.8 | 56.3 | 57.8 | 58.2 | 59.1 | 59.1 |
| Grain Size (Level) | — | 11.2 | 11.1 | 11.1 | 11.1 | 11 | 10 | 8 | 7 |
3. Tempering
a)Recommended Tempering Process Specifications
| Purpose | Tempering Temperature (°C) | Equipment | Cooling Method | Tempering Hardness (HRC) |
|---|---|---|---|---|
| Relieve stress, reduce hardness | 560 ~ 580 | Melting salt bath furnace or air furnace | Air cooling | 47 ~ 49 |
b)The relationship between tempering temperature and hardness
| Tempering Temperature (°C) | Hardness (HRC) |
|---|---|
| 100 | 59.0 |
| 200 | 57.0 |
| 300 | 54.5 |
| 400 | 54.5 |
| 450 | 57.5 |
| 500 | 57.5 |
| 550 | 53.5 |
| 600 | 49.5 |
| 650 | 40.0 |
| 700 | 30.0 |
H13 steel Applications
1. Die Casting Dies:
H13 die steel is heat resistant and tough. This makes it perfect for die-casting dies. In this process, molten metal is injected under high pressure and temperature.
2. Forging Dies:
The steel can handle high impact and mechanical stress. This makes it good for forging dies that shape metals at high temperatures.
3. Extrusion Dies:
H13 is strong and resists wear. This makes it useful for extrusion dies. These dies shape materials are under high pressure.
4. Plastic Molding Dies:
H13 tool steel is commonly used to make molds for plastic injection. It is needed for its heat resistance and wear resistance.
5. Hot Shear Blades:
Its ability to stay sharp at high temperatures makes it a great material for hot shear blades used in metal cutting processes.
6. Aluminum alloy building material mold materials:
H13 is widely used in China as a mold material for aluminum alloy building materials, so it is also called H13 mold steel.
Why should you choose Aobo Steel as your tool steel supplier?
At Aobo Steel, we pride ourselves on our exceptional supply capacity and dedication to meeting customer demands. Our monthly shipments exceed 1,500 tons in the Chinese market, reflecting our robust production and delivery capabilities. With a strong network of over 40 trusted suppliers, we ensure a steady supply of high-quality tool steels to meet various industry needs.
To provide even greater flexibility, we maintain stock for select products, allowing us to fulfill urgent orders quickly. Additionally, we specialize in fully customizable solutions, tailoring our products to your exact specifications for optimal application performance.
Our strategic location near the Yangtze River gives us a significant advantage in export logistics, enabling fast and cost-effective shipping to customers worldwide. Whether you need standard products or custom orders, Aobo Steel is committed to delivering reliability, quality, and service excellence.
At Aobo Steel, quality control is at the heart of our operations. Our dedicated testing team with over 20 years of experience ensures every product meets the highest standards before leaving our facility. Our comprehensive quality assurance process includes chemical composition analysis, metallographic examination, hardness testing, physical performance evaluation, and ultrasonic testing (UT) to detect internal defects.
To guarantee reliability, we perform 100% quality inspection on all products before shipment, ensuring they meet the required specifications and industry standards. Additionally, we support third-party inspections upon request to provide our customers with extra confidence in the quality of our materials. With this rigorous approach, Aobo Steel consistently delivers tool steels that offer superior performance and dependability in various applications.
At Aobo Steel, our service capacity is designed to meet diverse customer needs efficiently and precisely. We provide fully customizable products, offering surface treatments, descaling, and custom-length cutting options to suit specific requirements. Our experienced foreign trade team is well-versed in handling international orders, ensuring smooth communication and seamless transactions.
To provide the best service, we guarantee a 24-hour rapid response to all inquiries, allowing us to address your needs promptly and effectively. At Aobo Steel, we are committed to delivering high-quality tool steels and exceptional customer service to support your success.
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