Qingdao xinyuanzhu Group Co., Ltd.

The ZG230-450 is a cast carbon steel, also known as ZG25 or 25 steel. 230 refers to the yield strength of the cast steel piece is 230Mpa, 450 refers to the pull strength of the cast steel part is 450Mpa. ZG represents the pinyin abbreviation for cast steel and implements the GB/T11352 standard. Construction fasteners manufactured from this material become cast steel fasteners.

ZG230-450 this material of carbon steel casting performance is better, melting point is higher, the actual liquidity is poor, easy to oxidize, casting shrinkage rate of about 1.5% to 2.0%, solidification contraction of about 4.2%, pouring temperature of about 1500 to 1550 degrees C, cooling molding can be cold machine treatment.