Similar Grades:
DIN 1.2581 SKD5, BH21
Shape:
Round, Flat, Square.
Size Range:
| | Diameter(mm) | Thickness (mm) | Width (mm) | Length(mm) |
| Round | 20-480 | - | - | 2000-5800 |
| Square | 20-480 | - | - | 2000-5800 |
| flat | - | 20-50 | 80-600 | 2000-5800 |
Steel-making Condition:
EF, EF/EAF+LF+VD, EF/EAF+ESR
Delivery Condition:
Annealed , Quenched + Tempered
Surface Condition:
Black, Grinded, Peeled, Rough turned, Polished
Features:
1.Competitive price
2.Immediate delivery
3.Premium quality
4.Reliable service
5.MOQ: 1 Ton
| Packing details | In seaworthy packing, as your requirement. |
| Delivery details | within 30-50 days |
Chemical Composition:
| C | Mn | P | S | Si | Cr | W | V | Ni | Cu |
| 0.26-0.36 | 0.15-0.40 | 0.030max | 0.030max | 0.15-0.50 | 3.00-3.75 | 8.50-10.0 | 0.30-0.60 | 0.30max | 0.25max |
Heat Treatment
Forging: Forging of the H21 steels can be performed at 1150°C (2100°F) down to 927°C (1700°F) but not below 899°C (1650°F).
Annealing: Pack preferably in a suitable sealed container with spent carburising mixture or cast iron chippings to prevent excessive scaling or decarburisation. Heat to 850°C / 880°C, holding at temperature for sufficient time to achieve uniformity. Cool at less than 25°C per hour to 650°C followed by air cooling. Correctly annealed the tools or parts should not exceed 248 HB.
Stress relieving: Heat to 600°C / 650°C. Hold for 2-4 hours and furnace cool.
Hardening: Before heat treatment, sufficient machining should be carried out to remove surface decarburisation. Hardening should be carried out in controlled atmosphere furnaces or
neutral salt baths. Preheat slowly to 800°C / 850°C then transfer to a bath or furnace at
1120°C / 1170°C allowing sufficient time for uniform heating. Quench into warm oil or salt bath
operating at 520°C / 540°C. In the latter case ensure that the tools are allowed to equalise before
completing the quench by cooling in air.
Tempering: Tempering should be carried out immediately after proper completion of the quenching operation. Heat to within the 560°C / 675°C range soaking for two to three hours according to section. A second tempering cycle of similar duration is strongly recommended and care should be taken to ensure that the tools are allowed to cool to room temperature al least 50°C higher than that which the tools may be expected to achieve in service. The curve given indicates
typical hardness values obtained on oil quenching from 1160°C and double tempering.
Mechanical Properties:
Properties Metric
Hardness, Rockwell C 40.0 - 55.0
Bulk modulus 140 GPa
Poisson's ratio (25°C) 0.27-0.30
Elastic modulus 190-210 GPa
Introduction:
Tungsten hot work tool steels are of different types, namely, H21 to H26 types. These hot work tool steel have similar characteristics to that of high speed tool steel. The primary alloying elements in tungsten hot work tool steel include tungsten, chromium, carbon, and vanadium. They are resistant to distortion when they are air hardened, and have higher hardening temperature when compared to chromium hot work tool steel. Breakage of the tungsten hot work tool steel can be reduced if they are preheated to operating temperature before use. Thermal shock resistance and toughness of these hot work tool steel can be improved by reducing the carbon content.
Applications:
H21 hot work tool steel is particularly useful for hot forging and blanking dies and punches for making nuts, bolts and other similar small components. Dies, cores, inserts, pins, etc for the die casting of copper base alloys are also prime applications for this steel. Other uses include forming dies, shear blades, hot extrusion dies, mandrels, punches, die holders, ejector discs and extrusion liners.
Contact Information:
FUSHUN SPECIAL STEEL CO., LTD.
Tel: 89-0731-89903933(CHANGSHA, Office)
Fax: +86-0731-89853933
Mobile: +86-18773142293
Website: www.fushunspecialsteel.com
To expand the international market and get the advantages of markets in Hong Kong, We, FUSHUN SPECIAL STEEL Co., Ltd, were established by Huangshi Chengquan Group in 2014.
Huangshi Chengquan Group consists of the following parts:
Ezhou Liufan Chengquan Forging & Casting Factory, established in 1995, covers an area of 10000 square meters. The production capacity is more than 10000 tons per year.
Foshan Shiyong Tool Steel Sales Co., Ltd. Founded in 1998, covers an area of 3000 square meters, annual inventory of 15000 tons.
Provide with the following services: Saw Cutting, Mold, Machining.
Based on its manufacturing capacity, We, Fushun Special Steel Co., Ltd., are engaged in the import and export of iron alloy steel and other special steel.
Export:
Our own products:
Tool Steel: (carbon tool steel, alloy tool steel, high-speed tool steel),
Die steel: (cold work die steel, hot work die steel, plastic die steel)
And sale: Structural steel(carbon structural steel, alloy structural steel)
Shape: Round, square, flat, heavy thickness plate, heavy wall thickness steel tube.
Stainless steel, Bearing steel, Spring steel, Cold Heading Steel, Forgings
Imports: Ferroalloy (chromium iron, nickel iron, vanadium iron, molybdenum iron, etc. )
To provide high quality services for global customers, We insist in the follow principles:
Best price: Try our best to give the lowest price
Top quality: Fake a penalty ten
Fast delivery: Timely delivery
One stop shop: With 20 year business experience, we know steel sources in China, and we can provide a one stop shop service.
After service: Responsive, quality objection don't shuffle.
