A-2化學(xué)成分

C	Si	Mn	Cr	Mo	V	Ni
0.95-1.05	≤1.00	≤0.50	4.75-5.50	0.90-1.40	0.15-0.50	≤0.30

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A-2機(jī)械性能

ADVANTAGES:
Good combination of wear resistance and toughness. Very stable in heat treatment.
Not difficult to machine or grind.
Good Hardenability.
AVAILABILITY
Readily available
MACHINABILITY
A-2 can be machined readily in the fully annealed condition. Its machinability rating is about 65% of a 1% carbon tool steel. It also has a high grindability rating.
ANNEALING
Heat slowly to 1500 to 1600°F and furnace cool, allowing the temperature to drop about 75°Fper hour to 1000°F. Then air cool. The annealed hardness is 202 to 248 Brinell.

HARDENING

A-2 should be preheated at 1200° to 1300°F then taken up to 1725° to 1750°F. When part is at temperature it should be soaked 30 minutes for the first inch of thickness and 15 minutes for each inch of thickness over one inch. If a controlled atmosphere or vacuum furnace is not available then part should be wrapped in stainless foil to prevent decarburization. When the piece is taken from the furnace the stainless foil must be removed (if applicable) and then cooled in still air. Large pieces may require forced air.

TEMPERING

As soon as pieces have been cooled to room temperature (100° to 125°F) tempering must begin. Heat slowly to the tempering temperature selected to obtain the hardness desired. Double tempering is recommended.

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A-2產(chǎn)品形態(tài)

• 熱軋和冷拉棒材, 圓棒, 扁鋼, 六角棒, 八角棒, 空心棒
• 帶鋼和鋼卷, 熱軋帶鋼, 熱軋鋼卷, 冷軋鋼帶, 冷軋鋼卷
• 冷軋板材, 熱軋板, 冷軋薄板, 中厚板, 高強(qiáng)鋼板
• 熱軋和冷拉異型鋼, 凹凸字鋼, 滑軌, 滑塊
• 熱軋和冷拉鋼絲, 扁絲, 盤條, 直條
• 自由鍛和模鍛, 扁鋼, 模塊, 環(huán), 桶, 餅, 階梯軸及定制化
• 熱擠壓和冷軋無(wú)縫管, 異型管, 方管, 毛細(xì)管
• 電渣錠

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