A8 Air Hardening Tool Steel Bar
A-8, available upon request, is a versatile, air-hardening tool and die steel. It combines good wearing qualities with excellent toughness characteristics.
It is well suited for many metals working dies and punches, which operate in the hardness of Rockwell C 55-60.
The intermediate carbon and alloy content of A-8 gives it an optimum balance of toughness and wear resistance, makes it particularly adaptable for those applications which are too severe for high carbon-high chromium steels and too abrasive for conventional shock resisting steels.
In the hot work field, A-8 is used with outstanding success whenever erosion, wash, and wear of the lower carbon hot work steels is the primary problem.
Because of its higher carbon content, A-8 should NOT BE used where heat checking or breakage is the primary cause of failure.
Hot work tools of A-8 may be water-cooled in use if desired.
A-8 should be preheated at 1300 – 1400º F, then transferred to a furnace at 1825 – 1850º F soaked at this temperature for 30 minutes for sections 1 inch and thinner, then air cooled. Sections over 1 inch in thickness should be soaked for an additional 10 – 15 minutes per inch and then air-cooled. A-8 normally is air cooled from the hardening temperature, although for some applications it may be oil quenched. When the pieces have cooled to room temperature, temper immediately.
Temper A-8 immediately after quenching to room temperature. Allow to heat slowly to the desired tempering temperature and hold for a period of 1 to 6 hours, depending upon the size.
Remove from the furnace and allow to cool in the still air. For most cold work applications, tempering should be carried out in the range of 300 – 600º F or higher. Double tempering is recommended for best results with temperature above 600º F
A-8 is an oversized material, available upon request.
|Rounds||Up to 1″ + .007 up to .018|
|1″ up to 6″ + .015 up to .040|
|6″ and up + .0625 up to .250|
|Hardening Temp: 1800ºF through 1850ºF||Quench Medium: Air Salt Bath|
|Tempering Range: 300ºF through 1100ºF||Typical Level: 49 to 61 R/C|
|Preheat Forging: 1450ºF through 1550ºF||Forging Temp: 2100ºF through 2200ºF|
|Anneal Temp: 1600ºF||Anneal Cooling Method: Furnace-cool to 1000ºF at 100ºF per hr., then air cool.|
|Anneal Hardness: 241 BHN|
|A-8 Material in Stock||Color Code: YELLOW and BLACK|
|Round Dimensions:||¾” up to 2 ½”|
|Non-standard sizes, quoted upon request|
|A-8 Typical Analysis||C||Mn||Si||Cr||Mo||W|
|· Slight variations from typical analysis shown may occur in order to maintain the desired graphitizing potential.|
Miele Steel Co., Ltd., founded in 1998, is a professional manufacturer and global exporter specializing in metal manufacture and exportation. In recent years, winged by rapid merge and expansion, Our well-equipped plant emerged in Dainan, Jiangsu Province , with two Export offices respectively located in Shanghai and HongKong catering to a lager scale of customers from both home and abroad under the banner of supreme service.
Our plant now covers a land area of 18000 square meters, with 160 employees and 19 technicians. Backed up by our loyalty customers, old and new, as well as our advanced R&D team, the ranges of our stainless steel products are expanded to more varied choices, such as stainless steel wire, rod, round bar, flat bar, angle bar, channel bar, pipe, plate, sheet and coil made according to the norm and specification in GB, ASTM, JIS, EN, TOCT, KSD, and IS.
Our annual production capacity is now over 15000 T, most of which are widely used in petrochemical, textile, ship-making, construction industry and precision instrument manufacture. Our products are certified by ISO9001:2000 authentication quality systems and we are nominated as the AAA enterprise by Jiangsu government.
We promise "complete specifications, prompt delivery, high quality, competitive price, ". The unwavering supports you provide, along with the increasing requirements you put contributes to more varied high-quality products with more competitive prices we offer. Win-win situations are always our same pursuit.
If you are interested in our products, please feel free to contact us. We warmly welcome friends and cooperators from all over the world!
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standard export packing, sea worthy packing.Delivery Detail:
base on quantity, normally 15 days after order is confirmed