Aobo Steel supply H11 steel for your project
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H11 tool steel is an air-cooling hardening hot work tool steel. It has good toughness, good thermal strength, fatigue performance, and wear resistance at medium temperatures. It also has some toughness in the quenched state and is resistant to thermal fatigue. It is air-quenched at lower austenitizing temperatures, with minimal heat treatment deformation and a low tendency to form oxide skin. It can resist the erosion of molten aluminum. It is often used to make aluminum die-casting, hot extrusion, press forging, and plastic molds.
The designation is H11 in the U.S. ASTM A681 system. Similar designations under other national standards include ISO X37CrMoV5-1, Japan/JIS SKD6, USA/UNS T20811, Germany/DIN X38CrMoV5-1, Germany/W-Nr. 1.2343, and Czech Republic (CSN) 19552. In the following article, H11 steel is used as a substitute.
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 |
H11 tool steel equivalent grades and chemical composition under different standards
Standard | Grade | C (%) | Cr (%) | Mo (%) | Si (%) | V (%) | Mn (%) | P (%) | S (%) |
ASTM A681:2007 | H11/T20811 | 0.33 ~ 0.43 | 4.75 ~ 5.50 | 1.10 ~ 1.60 | 0.80 ~ 1.25 | 0.30 ~ 0.60 | 0.20 ~ 0.60 | ≤0.030 | ≤0.020 |
ISO 4957:1999 | X37CrMoV5-1 | 0.33 ~ 0.41 | 4.80 ~ 5.50 | 1.10 ~ 1.50 | 0.80 ~ 1.20 | 0.30 ~ 0.50 | 0.20 ~ 0.50 | ≤0.030 | ≤0.030 |
EN ISO 4957:2001 | X37CrMoV5-1/1.2343 | 0.33 ~ 0.43 | 4.80 ~ 5.50 | 1.10 ~ 1.50 | 0.80 ~ 1.20 | 0.30 ~ 0.50 | 0.20 ~ 0.50 | ≤0.030 | ≤0.030 |
GB/T 1299-2000 | 4Cr5MoSiV/T20501 | 0.33 ~ 0.43 | 4.75 ~ 5.50 | 1.10 ~ 1.60 | 0.80 ~ 1.20 | 0.30 ~ 0.60 | 0.20 ~ 0.50 | ≤0.030 | ≤0.030 |
JIS G4404:2006 | SKD6 | 0.32 ~ 0.42 | 4.50 ~ 5.50 | 1.00 ~ 1.50 | 0.80 ~ 1.20 | 0.30 ~ 0.50 | ≤0.50 | ≤0.030 | ≤0.020 |
Physical properties
1. Critical Temperatures
| Critical Point | Ac1 | Ac3 | Ar1 | Ar3 | Ms | Mf |
|---|---|---|---|---|---|---|
| Temperature (Approximate Value) / °C | 853 | 912 | 720 | 773 | 310 | 103 |
2. Linear Expansion Coefficient
| Temperature (°C) | 20~100 | 20~200 | 20~300 | 20~400 | 20~500 | 20~600 | 20~700 |
|---|---|---|---|---|---|---|---|
| Linear Expansion Coefficient (×10^-6 °C^-1) | 10.0 | 10.9 | 11.4 | 12.2 | 12.8 | 13.3 | 13.6 |
3. Thermal Conductivity
| Temperature (°C) | 100 | 200 | 300 | 400 | 500 | 600 | 700 |
|---|---|---|---|---|---|---|---|
| Thermal Conductivity (W·(m·K)^-1) | 25.9 | 27.6 | 28.4 | 28.0 | 27.6 | 26.7 | 25.9 |
Elastic Modulus
| Temperature (°C) | 20 | 100 | 200 | 300 | 400 | 500 |
|---|---|---|---|---|---|---|
| Elastic Modulus (GPa) | 227 | 221 | 216 | 208 | 200 | 192 |
Forging process
| Heating Temperature (°C) | Starting Forging Temperature (°C) | Final Forging Temperature (°C) | Cooling Method |
|---|---|---|---|
| 1120 ~ 1150 | 1050 ~ 1100 | ≥850 | Slow Cooling (Pit Cooling or Sand Cooling) |
H11 steel heat treatment
Pre-Heat Treatment
General annealing: heat to 860 ~ 890°C, hold for 2 ~ 4 hours, cool to below 500°C in the furnace, then air cool, achieving a hardness after annealing of ≤ 229 HBW.
Stress Relief Annealing: Heating temperature is 730-760℃, holding for 3-4 hours, followed by furnace cooling or air cooling.
Quenching
Preheat the material to (790 ± 15)°C, then heat to (1000 ± 6)°C (salt bath) or (1010 ± 6)°C (furnace-controlled atmosphere), maintain for 5-15 minutes, quench in air, achieving 53-55 HRC hardness.
Tempering
Preheat the material to 550 ~ 560°C, cool in air, and temper twice, with the second tempering 20 ~ 30°C lower than the first, to achieve 47 ~ 49 HRC hardness.
H11 steel Applications
H11 tool steel is widely used in industries that require tools to resist both high heat and mechanical stresses. Some of the common applications include:
Die Casting Dies: H11 makes dies for casting aluminum, zinc, and magnesium. This is because it has high thermal stability and toughness.
Forging Dies: It can resist bending at high temperatures. This makes it a popular choice for forging dies and hot-forming tools.
Extrusion Tools: H11 is used in extrusion dies for metals and plastics. It is known for its wear resistance and ability to handle high temperatures.
Hot Shear Blades: The steel is ideal for manufacturing blades that cut hot metals due to its heat and wear resistance.
Aerospace Components: H11 is used in landing gear and other important parts in aerospace. These parts need to be strong and resist fatigue.
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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