... /GB/T 1222 4.Surface:Smooth,Double Groove 60Si2Mn spring flat steel priceSpecification1) Grade: 60Si2Mn,SUP7,G92600,61SiCr7,60Si7,250A58/250A61 ... machinery elements of friction and wear.Profile:We are a large-scale manufacturer for spring steel bar in Daqiuzhuang Tianjin, which ... quality, reasonable price and good after-sales service,Daqiang spring flat steel has been sold to most provinces at home and ...