20#無縫鋼管尺寸及偏差
20#無縫鋼管尺寸及允許偏差,偏差等級 標準化外徑(外緣直徑)允許偏差 D1 ±1.5%,最小±0.75 mm D2 ±1.0%。無縫鋼管按照斷面形狀,無縫鋼管分圓(yuan)形(xing)和異形(xing)兩種(zhong),異形(xing)管(guan)(guan)有方(fang)形(xing)、橢圓(yuan)形(xing)、三角形(xing)、六角形(xing)、瓜子形(xing)、星(xing)形(xing)、 帶翅管(guan)(guan)多種(zhong)復雜形(xing)狀。GB9948無(wu)縫鋼管(guan)(guan)主(zhu)要用來生產氣動或液壓 元(yuan)件的產品,如氣缸或油缸,都是用無(wu)縫管(guan)(guan)。精密無(wu)縫鋼管(guan)(guan)的化學成分有碳(tan)C、硅Si、錳Mn、硫S、磷(lin)P、鉻Cr。B3087無(wu)縫鋼管(guan)(guan)無(wu)縫鋼管(guan)(guan)用途很(hen)廣泛。
20#無縫鋼管屈服強度(strength)(MPa):≥245(25) 20#無縫鋼管力學(xue)性能(xìng néng):抗拉強度(du)(strength) σb (MPa):≥410(42)屈服(fu)強度(du)(strength) σs (MPa):≥245(25)伸長率 δ5 (%):≥25斷面(mian)收縮(suo)率 ψ (%):≥5,硬(ying)度(du)(Hardness) :未(wei)熱處(chu)理(processing),≤156HB,試樣尺寸:試樣尺寸25mm 20#無縫鋼管(guan)現貨 規格(ge)(specifications)規格(ge)(specifications)規格(ge)194*11245*18325*12219*6245*20325*13219*6.5273*7325*14219*7273*8325*15219*8273*9325*16219*9273*9.5325*18219*10273*10325*20219*11273*11325*25219*12273*12351*10219*13273*13377*9219*14273*14377*10219*15273*15377*11219*16273*16377*12219*18273*18377*13219*20273*20377*14219*25273*25377*15245*7273*30377*16245*8273*36377*17245*9299*12377*25245*10325*8426*8245*12325*9426*9245*14325*10426*10
一般用途(tu)的無縫(feng)鋼(gang)管(guan)(guan)由(you)普通的碳素(su)結構鋼(gang)、低(di)合(he)金結構鋼(gang)或合(he)金結構鋼(gang)軋(ya)制,產量最(zui)多,主要用作輸送流體(ti)(ti)的管(guan)(guan)道或結構零件(jian)。最(zui)小±0.50 mm D3 ±0.75%.最(zui)小±0.30 mm D4 ±0.50%。最(zui)小±0.10 mm 無縫(feng)鋼(gang)管(guan)(guan)工(gong)(gong)藝( technology)流程(cheng)(cheng)衛(wei)生(sheng)(hygienism)級鏡面管(guan)(guan)工(gong)(gong)藝( technology)流程(cheng)(cheng):管(guan)(guan)坯(pi)(pi)——檢(jian)(jian)驗(yan)——剝(bo)皮——檢(jian)(jian)驗(yan)——加(jia)(jia)熱(re)(heating )——穿(chuan)孔(kong)——酸(suan)(suan)(suan)(Acerbity)洗——修磨——潤滑(hua)(lubrication)風(feng)干(gan)——焊(han)頭(tou)(tou)——冷拔(ba)——固溶處(chu)理(processing)——酸(suan)(suan)(suan)(Acerbity)洗——酸(suan)(suan)(suan)洗鈍(dun)化(Inactivation)——檢(jian)(jian)驗(yan)——冷軋(ya)——去油——切頭(tou)(tou)——風(feng)干(gan)——內拋光(guang)(guang)(解釋:磨擦(ca)使物體(ti)(ti)(如金器)光(guang)(guang)滑(hua)的過程(cheng)(cheng))——外拋光(guang)(guang)(解釋:磨擦(ca)使物體(ti)(ti)(如金器)光(guang)(guang)滑(hua)的過程(cheng)(cheng))——檢(jian)(jian)驗(yan)——標識——成品包裝(packaging) 工(gong)(gong)業(ye)管(guan)(guan)工(gong)(gong)藝流程(cheng)(cheng) 管(guan)(guan)坯(pi)(pi)——檢(jian)(jian)驗(yan)——剝(bo)皮——檢(jian)(jian)驗(yan)——加(jia)(jia)熱(re)(heating )——穿(chuan)孔(kong)——酸(suan)(suan)(suan)洗——修蘑——潤滑(hua)(lubrication)風(feng)干(gan)——焊(han)頭(tou)(tou)——冷拔(ba)——固溶處(chu)理——酸(suan)(suan)(suan)洗——酸(suan)(suan)(suan)洗鈍(dun)化(Inactivation)——檢(jian)(jian)驗(yan)