H21 Hot Work Tool Steel
Type:Round bar
Delivery condition: Annealed black surface/Turned bright surface/Q+T
Introduction:
Welcome to our product introduction for DIN1.2581/H21 Hot Work Tool Steel. Our factory is located in China and we are a manufacturer that specializes in producing high-quality hot work tool steel products. This particular product is one of our best-selling items, with a wide range of applications and numerous advantages that set it apart from the competition. In this article, we will introduce DIN1.2581/H21 Hot Work Tool Steel in detail, highlighting its characteristics, advantages, and different applications.
What is DIN1.2581/H21 Hot Work Tool Steel?
DIN1.2581/H21 Hot Work Tool Steel is a high-performance material that is used primarily in the manufacture of hot work tools. It is a versatile material that exhibits excellent toughness, hardness, and heat resistance, all of which are critical factors for achieving optimal results in the demanding world of hot work tool manufacturing.
The composition of this material is primarily made up of chromium, tungsten, and molybdenum, with additional elements such as vanadium, nickel, and carbon. The presence of these elements ensures that the product is able to withstand high temperatures, resist wear and tear, and exhibit exceptional toughness and strength.
Advantages of DIN1.2581/H21 Hot Work Tool Steel:
1. Excellent heat resistance:
DIN1.2581/H21 Hot Work Tool Steel is capable of withstanding high temperatures of up to 650°C without losing any of its strength or ductility. This makes it an ideal material for hot work tools that are exposed to high temperatures and heavy use.
2. High hardness:
This product has a hardness rating of up to 52-56 HRC, which means that it can resist wear and tear even when used in challenging environments. The high hardness also ensures that the product can maintain its shape and size over time, which is essential for the longevity of hot work tools.
3. Superior toughness:
In addition to its high heat resistance and hardness, DIN1.2581/H21 Hot Work Tool Steel also exhibits exceptional toughness, which means that it can absorb impacts and vibrations without breaking or cracking. This toughness makes it an ideal material for tools that require high levels of impact resistance.
4. Corrosion resistance:
The product is designed to resist both physical and chemical corrosion, which means that it will last longer and require less maintenance than other materials. This corrosion resistance also makes it an ideal choice for use in harsh environments such as offshore or marine industries.
Applications of DIN1.2581/H21 Hot Work Tool Steel:
1. Die casting:
DIN1.2581/H21 Hot Work Tool Steel is commonly used in the manufacturing of die-casting molds, as it is able to withstand the high temperatures and pressures needed for this manufacturing process. It is also able to resist wear and tear, ensuring that the molds maintain their shape and size over time.
2. Forging:
This product is also used in the forging process to manufacture high-quality, durable tools. Its high hardness and toughness make it ideal for use in the construction of hammers, anvils, and other forging tools.
3. Extrusion:
DIN1.2581/H21 Hot Work Tool Steel is also commonly used in the extrusion process. Its ability to withstand high temperatures, resist wear and tear, and maintain its shape and size over time make it an ideal material for hot extrusion dies.
4. Heat treatment:
This product is also commonly used in heat treatment processes, where it is essential to maintain the tool's shape and size while withstanding high temperatures. Its high heat resistance and toughness make it an ideal material for this application.
Conclusion:
In conclusion, DIN1.2581/H21 Hot Work Tool Steel is a high-performance material that offers many advantages over other materials in the manufacturing of hot work tools. Its exceptional heat resistance, hardness, toughness, and corrosion resistance make it an ideal material for use in a variety of applications, including die casting, forging, extrusion, and heat treatment. If you are a merchant looking for a reliable and high-quality hot work tool steel product, we highly recommend DIN1.2581/H21 Hot Work Tool Steel from our factory in China!
Products Description
H21 is a hot working die steel containing tungsten. The steel increases the Mo content by 2%, and properly adds the Mn content, which improves the high temperature mechanical properties of the steel and meets the needs of mass production of aluminum alloy die-casting molds. The steel has high thermal elasticity, high thermal stability, good wear resistance and technological properties, and the working temperature reaches 650 ℃.
Heat treatment process
Tempering specification: quenching temperature 1050~1100 ℃, oil cooling, tempering temperature 660~680 ℃, hardness after treatment 49~52HRC
Tempering temperature 600~620 ℃, hardness after treatment 40~44HRC. Quenching temperature 800~850 ℃, hard 50HRC
Quenching temperature 1050~1100 ℃, oil cooling, tempering temperature 660~680 ℃, hardness after treatment 49~52HRC, tempering temperature 600~620 ℃, hardness after treatment 40~44HRC.
H21 Typical application examples
① Die sheet products are applicable to forging press dies, concave and convex dies, die-casting dies, hot metal cutters and other industries.
② Aluminum alloy die-casting die for mass production.
.
Products parameters
|
Standards |
DIN |
AISI |
JIS |
ГОСТ |
|
X30WCrV93 |
1.2581 |
H21 |
SKD5 |
3X2B8 |
H21 Equivalents' Chemical Composition
|
C |
Si |
Mn |
P |
S |
Cr |
W |
V |
|
0.25-0.35 |
0.15-0.30 |
0.20-0.40 |
≤0.030 |
≤0.030 |
2.50-2.80 |
8.00-9.00 |
0.30-0.40 |
H21 Mechanical properties
|
Applications :
|
H21 Tool steel is for hot mechanical working such as highly stressed small pressing dies and die inserts especially for die forging of accurate products from the difficult-workable steels and copper alloys, thorns and jaws for forging presses, forgings for swaging, tools for production of rivets, nuts and screws, small extrusion dies (matrices), thorns, pressing discs for extrusion of alloys of non-ferrous metals. |
Heat Treatment:
|
Soft annealing |
Temperature(°C) |
Cooling |
Hardness |
|
740 - 780 |
furnace |
max. 241 HB |
|
Forging |
Temperature(°C) |
Cooling |
|
|
850 - 1100 |
furnace |
|
Hardening |
Temperature(°C) |
Cooling |
Tempering |
|
|
1140 - 1160 |
oil or air |
see tempering diagram |
Surface conditions: scaled (hot working finish)/ground/rough machining/fine machining/based on the customer's requirement
Furnaces for metallurgical processing: electrode arc + LF/VD/VOD/ESR/Vacuum consumable electrode.
Ultrasonic inspection: 100% ultrasonic inspection for any inperfections or based on the customer's requirement
Product Picture
Our factory
Steel Making
Ingot Production
Forged Bars
Machinary
Characteristics of H21 die steel:
The steel section can be hardened below 80mm. This is enough for the surface layer to require large top forging dies, hot pressing dies and flat forging machine dies with high hardness and high wear resistance. This kind of steel has high transformation temperature and good thermal fatigue resistance against cold and hot alternation. This kind of steel can be used to make punch and die with high stress under high temperature, but not subject to impact load, such as punch and die used on flat forging machine, insert, copper alloy extrusion die, die casting die, such as reverse extrusion die; It can also be used as a hot metal cutter under high temperature. Tungsten-containing hot-working die steel, which increases the content of Mo by 2%, and properly adds the content of Mn to improve the high temperature mechanical properties of the steel, and meets the needs of mass production of aluminum alloy die-casting molds. The steel has high thermal strength, high thermal stability, good wear resistance and technological properties, and the working temperature reaches 650 ℃
H21 steel, a tungsten containing hot work die steel, contains a lot of chromium and tungsten elements that are easy to form carbides, so it has high strength and hardness at high temperature, and its hardness reaches HB-300 at 650 ℃, but its toughness and plasticity are poor.
Packing & Delivery
Packing & Delivery
-
The inner size of container is below:
-- 20ft GP: 5.8m(length) x 2.13m(width) x 2.18m(high)
-- 40ft GP: 11.8m(length) x 2.13m(width) x 2.18m(high)
-- 40ft HG: 11.8m(length) x 2.13m(width) x 2.72m(high)
Our Service
1. Competitive price and quality from our own factory .
2. Best service with 24 hour`s reply .
3. Flexible payment with T/T,L/C , etc .
4. Smooth production ability(1000tons/month).
5. Quick delivery and standard exporting package.
Why choose us?
- Our Die Steel Bar products are made from high-grade materials and are designed to be durable and long-lasting.
- Our DIN1.2581 / H21 Hot Work Tool Steel is directly participated by experienced technicians from design to production and completion to ensure quality and strive for excellence.
- We have a range of Die Steel Bar products that are suitable for use in a wide range of applications.
- We strive to build a first-class brand in the industry with advanced concepts, the spirit of hard work, professional team and strict management.
- As a manufacturer of Die Steel Bar, we are committed to delivering high-quality products that meet or exceed our customers' expectations.
- We have a team of staff with serious working attitude, solid business foundation, strong sense of unity and cooperation, and excellent professional and technical level.
- We take pride in our ability to provide customized Die Steel Bar products and services that meet the needs of our customers.
- Our company is willing to be honest with you, cooperate sincerely, and open the source of interests together.
- We provide professional services to help our customers find the right Die Steel Bar products for their needs.
- With the continuous development of market economy, we have strong technical force, reliable product quality and perfect after-sales service.
Relevant Steel Specifications of AISI T4 High Speed Tool Steels
| Country | USA | German | Japan |
| Standard | ASTM A600 | DIN EN ISO 4957 | JIS G4403 |
| Grades | T4/T12004 | S 18-1-2-5/1.3255 | SKH3 |
AISI T4 Tool Steel and Equivalents' Chemical Composition
| ASTM A600 | C | Mn | P | S | Si | Cr | V | W | Mo | Co | ||||||||
| T4 | 0.70 | 0.80 | 0.10 | 0.40 | 0.03 | 0.03 | 0.20 | 0.40 | 3.75 | 4.50 | 0.80 | 1.20 | 17.50 | 19.00 | 0.40 | 1.00 | 4.25 | 5.75 |
| DIN ISO 4957 | C | Mn | P | S | Si | Cr | V | W | Mo | Co | ||||||||
| S 18-1-2-5/1.3255 | 0.75 | 0.83 | … | 0.40 | 0.03 | 0.03 | … | 0.45 | 3.80 | 4.50 | 0.80 | 1.20 | 17.50 | 18.50 | 0.50 | 0.80 | 4.50 | 5.50 |
| JIS G4403 | C | Mn | P | S | Si | Cr | V | W | Mo | Co | ||||||||
| SKH3 | 0.73 | 0.83 | … | 0.40 | 0.03 | 0.03 | … | 0.45 | 3.80 | 4.50 | 0.80 | 1.20 | 17.00 | 19.00 | … | … | 4.50 | 5.50 |
Mechanical Properties of T-4 Steel
| Properties | Metric | Imperial |
| Modulus of elasticity | 190-210 GPa | 27557-30458 ksi |
| Poisson's ratio | 0.27-0.30 | 0.27-0.30 |
Thermal Properties of T4 Tool Steels
| Properties | Metric | Imperial |
| Thermal expansion co-efficient | 11.9 µm/m°C | 6.6 µin/in°F |
Forging of ASTM T4 Tool Steel Materials
Forging of T4 steel can be carried out from 850 to 1120°C (1775 to 2100°F).
Preheat T4 steel material uniformly and slowly to 860-880°C.
Increase the forging temperature up to 1050-1120°C.
T4 hss tool steel should be cooled very slowly after forging.
AISI/ASTM T4 Tool Steel Heat Treatment and Properties
Hardening:
Harden T4 high speed tool steel from a temperature of 1260-1290oC followed by oil, air quenching or warm bath at 550oC. Hardness after quenching is 63-66 HRC.
Annealing:
T4 steel should be annealed after hot working. Increase the temperature of T4 high speed steel to 860°C(Max220°C per hour). Hold at the temperature and then cool slowly with the furnace. The annealed hardness achieved should be below HB255.
Tempering:
Tempering temperature: 2x 560-580oC. Hardness after tempering is 64-65 HRC.
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