China supplier OEM D2 Tool Steel | 1.2379 | X153CrMo12 | SKD11 Factory from Argentina
1. Relevant D2 Steel Specifications Country USA German Japan Standard ASTM A681 DIN EN ISO 4957 JIS G4404 Grades D2 1.2379/X153CrMo12 SKD11 2. D2 Tool Steel Chemical Composition ASTM A681 C Mn P S Si Cr V Mo D2 1.4 1.6 0.1 0.6 0.03 0.03 0.1 0.6 11 13 0.5 1.1 0.7 1.2 DIN ISO 4957 C Mn P S Si Cr V Mo 1.2379/X153CrMo12 1.45 1.6 0.2 0.6 0.03 0.03 0.15 1.6 11 13 0.7 1 0.7 1 JIS G4404 C Mn P S Si Cr V Mo SKD11 1.4 1.6 0.6 0.03 0.03 0.4 11 13 0.2 0.5 0.8 1.2 3. AISI Grade...
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D2 Tool Steel | 1.2379 | X153CrMo12 | SKD11 Factory from Argentina, We welcome new and old customers from all walks of life to contact us for future business relationships and mutual success.
1. Relevant D2 Steel Specifications
|Standard||ASTM A681||DIN EN ISO 4957||JIS G4404|
2. D2 Tool Steel Chemical Composition
|DIN ISO 4957||C||Mn||P||S||Si||Cr||V||Mo|
3. AISI Grade D2 Steel Mechanical Properties
|Hardness, Knoop (converted from Rockwell C hardness)||769||769|
|Hardness, Rockwell C||62||62|
|Izod impact unnotched||77.0 J||56.8 ft-lb|
|Elastic modulus||190-210 GPa||27557-30457 ksi|
|Thermal expansion||10.4 x 10-6/ºC||20-100||
4. AISI/ASTM A681 D2 Grade Steel Forging
Heating for forging of AISI D2 tool steel should
be done slowly and uniformly. Soak through at 1850°-1950°F and reheat as often
as necessary, stopping work when the temperature drops below 1700°F(926℃). After D2
die steel forging, cool slowly in lime, mica, dry ashes or furnace. AISI D2 steel
should always be annealed after forging.
5. D2 Tool Steel Heat Treatment
ASTM D2 steels alloy should be preheated very slowly to 815oC (1500oF) and then temperature can be increased to 1010oC (1850oF). They are then held at 1010oC (1850oF) for 20 to 45 minutes and air cooled (air quenched).
Annealing of D2 tool steels material should be done at 871 to 898oC (1600 to 1650oF) followed by slow furnace cooling at 4.4oC (40oF) per hour or less.after which cooling rate may be increased. Suitable precautions must be taken to prevent excessive carburization or decarburization.
When desirable to relieve the strains of machining, heat D2 grade steel slowly to 1050°-1250°F, allow to equalize, and then cool in still air (Strain Relieving).
Preheat Prior To Hardening
Preheat slowly to 1350°-1450°F and hold at this temperature until grade steel D2 material is uniformly heated.
After thorough preheating, heat to 1800°-1850°F. Hold the work piece at the hardening temperature until it is completely and uniformly heated.
AISI D2 steel tool material is an air hardening steel and will develop hardness on cooling in still air. To avoid scaling and prevent decarburization of the work piece surface, controlled atmosphere or vacuum furnaces are recommended. If these furnaces are not available, pack hardening, salt baths or wrapping the piece in stainless steel foil will provide some degree of surface protection in the hardening process. Parts should be allowed to cool to 150F, or to where they can be held in the bare hand, and then temper immediately.
The tempering temperature on material D2 steel may be varied according to the desired hardness. D2 steels can be tempered at 204oC (400oF) for achieving Rockwell C hardness of 61 and at 537oC (1000oF) for a Rockwell C hardness of 54.
6. D2 Tool Steel Material Application
AISI grade D2 tool steels are used for long run tooling applications, where wear resistance is important, such as blanking or forming dies and thread rolling dies.
Some main applications for D2 tool steel are as below:
Blanking Dies, Forming Dies, Coining Dies, Slitting Cutters, Heading Tools, Long Punches, Forming Rolls, Edging Rolls, Master Tools, Beading Rolls, Intricate Punches, Extrusion Dies, Drawing Dies, Lamination Dies, Thread Rolling Dies, Shear Blades, Burnishing Tools, Gauges, Knurls, Wear Parts.
We usually hold D2 tool steel on sale activities, and you would have our price on regular schedule. Contact us and sign in our newsletter to have D2 tool steel materials price list and commercial quote today.
9/eleven: An Architect’s Guide | Part one: Earth Trade Middle Constructing seven
Class Variety: AE911-AAG-”L1″ (or “OD1″ if viewing the archive)
one LU/HSW for just about every element.
(If you are an architect and you would like to earn mastering models for observing this AIA CES-authorised study course, we inspire you to visit http://AE911Truth.org/Continuing-Ed, where by you may check out the video and acquire the quiz to earn models. If you previously viewed this video on YouTube, you may even now a earn mastering unit by using the quiz at http://AE911Truth.org/Continuing-Ed/AE911-AAG-OD )
Live three-element webinar collection. Just about every element is about 1 hour extensive, adopted by a small Q&A. (Architects do not want to show up at all three areas to earn mastering models for the element(s) they show up at.)
AIA associates: To sign-up your attendance and earn mastering models, you should submit your name, e-mail deal with, and AIA membership quantity on the net at http://AE911Truth.org/Continuing-Ed/AE911-AAG-L.html when you are requested to do so by the webinar instructor.
Architects & Engineers for 9/eleven Truth is pleased to be an AIA CES-authorised service provider of continuing instruction for architects. As a 501(c)(3) nonprofit business focused to conducting investigate and furnishing instruction about the total destruction of the three Earth Trade Middle skyscrapers, our courses give architects the technical expertise and analytical framework with which to evaluate the most very likely cause of these making failures.
Never ever right before has a steel-framed high-rise collapsed from hearth. Why, then, did three this kind of structures collapse on September eleven, 2001?
In Part one of “9/eleven: An Architect’s Guide,” Richard Gage, AIA, offers an overview of the most essential evidence about the destruction of Earth Trade Middle Constructing seven (WTC seven), a forty seven-tale high-rise that was not struck by an airplane.
The injury WTC seven experienced from the collapse of the North Tower was uncovered to be inconsequential. It experienced fires that were similar to these that have transpired earlier in high-rise structures. But it fell symmetrically into its individual footprint in the fashion of a regular managed demolition.
In 2008, the National Institute of Benchmarks and Technological know-how (NIST) concluded that WTC 7’s destruction was brought about by usual place of work fires that burned “at temperatures hundreds of degrees underneath these typically viewed as in style practice for establishing structural hearth resistance scores.”
Is NIST’s explanation for this unparalleled structural failure valid? With each other, we will review the collapse and evaluate which of the two hypotheses — hearth-induced failure or managed demolition — is extra steady with the evidence. Members will be encouraged to make your mind up for by themselves if a new investigation is warranted.
Members will be able to:
one. Explain the qualities of making fires and the aspects of high-rise style that lead to make hearth-induced failure in steel-framed high-rise structures a exceptional incidence.
2. Acknowledge the unique capabilities related with hearth-induced failure and the unique capabilities related with the procedure of managed demolition.
3. Explain move-by-move the collection of structural failures that the National Institute of Benchmarks and Technological know-how uncovered to be the most very likely cause of the collapse of Earth Trade Middle Constructing seven.
4. Assess the bodily evidence and the dynamics of the collapse of Earth Trade Middle Constructing seven according to how steady it is with the competing hypotheses of hearth-induced failure and managed demolition.
Check out http://AE911Truth.org/Continuing-Ed.html for extra details and to perspective other AIA CES-authorised courses available by AE911Truth.
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