Zahlung und Versand AGB:
|Matrial:||Werkzeugstahl||Standard:||GB, ASTM, LÄRM, JIS|
|Grad:||H21 / 1,2581||Durchmesser:||20-1000mm|
|Länge:||Unterhalb 16 Meter||Shape:||Rundeisen|
|Techniken:||Kaltbezogen; Warm gewalzt; Kaltgewalzt; Geschmiedet||Oberfläche:||Schwarz, hell, Polier, abgezogen oder auf Anfrage|
|Ultraschallprüfung:||100% UT geführt||Verarbeitung:||Getempert oder gelöscht und gemildert zur Verfügung gestellt|
|Ende:||Abgeschrägtes, einfaches Ende wie erforderlich||Qualitäts-Inspektion:||SGS, BV etc.|
|Bedienung:||Ausschnittservice und Inspektion der 3. Partei wird zur Verfügung gestellt|
Tungsten hot-work steels are of different types, namely, H21 to H26 types. These steels have similar characteristics to that of high-speed steels. The primary alloying elements in tungsten hot-work steels 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 steels. Breakage of the tungsten hot-work steels can be reduced if they are preheated to operating temperature before use. Thermal shock resistance and toughness of these steels can be improved by reducing the carbon content.
AISI H21 tool Steel is a high quality Hot work tool steel, It belong to the high quality high carbon alloy tool steel. Oil Quenched & Tempered Hardenss is 28-34 HRc. AISI H21 steel Annealing delivery hardenss less than 250HB.
H21 Hot work steels are Suitable for the manufacture of complex shapes, impact load, the working temperature is not too high, mold sheet product is suitable for forging press mold, concave and convex die, die casting, hot metal cutting knife, etc. the mass production with aluminum alloy die-casting mould.
|Steel Grade||1.2581||Application||Tool steel, Mold Steel|
|Shape||Round Bar||Standard||GB, ASTM, DIN,JIS|
|Dimension||Φ20-1000 mm; length below 16m||Surface||Black, Bright, Polished, Peeled|
|Technique||Cold drawn; Hot rolled; Forged||Ultrasonic Test||100% UT Passed|
-EAF+(ESR) or EAF+LF+VD+(ESR)
-HOT rolled; Cold rolled; Forged; Cold Drawn
-Heat Treatment: Untreated, Annealing, N+T, Q+T
-Smelting: EAF+LF+VD (+ESR)
-Surface Finish: Black, Rough Machined, Peeled, Turned or as per given requirements
-UT 100% passed
-Cutting service provided
-Third Party inspection is acceptable (SGS, BV etc.)
CHEMICAL COMPOSITION (%)
(@399°C/750°F, hardened to 62 HRC )
|Elastic modulus (hardened to 62 HRC)||Yield
(0.2%, hardened to 55 HRC)
(0.2%, hardened to 60 HRC)
(0.2%, hardened to 62 HRC)
(0.2%,hardened to 50 HRC)
Machinability-The tungsten content in the H21 steels makes it difficult to machine in comparison to water hardening low alloy steels with 100% machinability while H21 is rated at 55%.
Forming-H21 steels can be formed using conventional methods.
Welding-H21 steels can be welded.
Heat Treatment-This process requires the H21 steels to be preheated to 816°C (1500°F) and then heated rapidly to 1177°C (2150°F). Then these steels should be held at the same temperature for 2 to 5 minutes and finally air cooled or oil quenched.
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).
Cold Work-H21 steels can be cold-worked using conventional methods.
Annealing-Annealing should be performed at 885°C (1625°F) followed by slow furnace cooling at a temperature less than 4°C (40°F) per hour.
Tempering-Tempering of the H21 steels is performed at 593 to 677°C (1100 to 1250°F) to realize Rockwell C hardness of 54 to 36. A double tempering process is advisable and the parts should be maintained at same temperature for one hour.
What we can offer?
-We offer a wide range of steel products in a wide variety of dimensions and executions, according to the common international specifications or customize.
-Machining and heat treatment are available.
-Also, we advise you in choosing the right materials.
OUR MAIN PRODUCTS ARE LISTED AS BELOW
-Round: Dia. 20-1000 mm
-Flat: T. 10-120 mm x W. 60-810 mm
-Block: T. 80-1200 mm x W. 100-1600 mm
PAYMENT AND SHIPPING
1. Both T/T and L/C will be acceptable
2. Trade Terms: FOB, CIF, CFR
3. The delivery will be in 10-15 days if have stock; For customized items, the delivery will be negotiated by both parties
4. Shipping by sea freight from Shanghai Port (PRC) for Bulk orders, by airfreight or express for samples
Shanghai Unite Steel Trading Co., Ltd
We are committed to integrate engineering steel resources in china and serve the global engineering steel market. Our company has more than 15 years of experience in steel researching, production, managing and sales. And our team mostly are based on and worked in national famous steel enterprise.
In the aspect of resources and information, we have established cooperative and stronger relationship with nearly hundred enterprises, either state-owned or private owned in china.
What’s more, we have built long, deep and close business relationship with dozens of steel company, Sharing and holding equities with several steel enterprises. Because of the close cooperation with steel companies and our pioneering spirit, which can ensure us stay at the top competition, and ensure our customers get what they really want!
Q: Are you a manufacturer or merely a trader?
A: We are group of companies and owned manufacturer bases and trading company. We specialized in special steel which include alloy structural steel and carbon steel and stainless steel, etc. All material are with high quality and competitive price.
Q: How do you guarantee the quality of your product?
A: Firstly, we can provide the certificates from the third party, such as TUV, CE, if you need. Secondly, we have a complete set of inspection system and every process is checked by QC. Quality is the lifeline of enterprise survival.
Q: Delivery time?
A: We have ready stock for most of material grades in our warehouse. If the material doesn't have stock, the delivery lead time is about 5-30 days after receiving your prepayment or firm order.
Q: What is the payment term?
A: T/T or L/C.
Q: Can we visit your company and factory?
A: Yes, warmly welcome! We can book the hotel for you before you come to China and arrange our driver to our airport to pick you up when you come.
We are happy to answer your questions and make you an offer for these and other materials. Contact us now for more information.
Your Contact Person
Ms Chilli Ho