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)(xing)(xing)和(he)異形(xing)(xing)(xing)兩(liang)種,異形(xing)(xing)(xing)管有方形(xing)(xing)(xing)、橢(tuo)圓(yuan)形(xing)(xing)(xing)、三角(jiao)形(xing)(xing)(xing)、六角(jiao)形(xing)(xing)(xing)、瓜子形(xing)(xing)(xing)、星(xing)形(xing)(xing)(xing)、 帶翅管多種復雜形(xing)(xing)(xing)狀(zhuang)。GB9948無(wu)縫鋼管主(zhu)要用來生產氣動或(huo)(huo)液壓(ya) 元件的產品(pin),如氣缸(gang)或(huo)(huo)油缸(gang),都是用無(wu)縫管。精密無(wu)縫鋼管的化學成分有碳(tan)C、硅(gui)Si、錳Mn、硫S、磷P、鉻Cr。B3087無(wu)縫鋼管無(wu)縫鋼管用途很(hen)廣(guang)泛。
20#無縫鋼管屈服強度(strength)(MPa):≥245(25) 20#無縫鋼管力學性能(xìng néng):抗(kang)拉強度(du)(strength) σb (MPa):≥410(42)屈服(fu)強度(du)(strength) σs (MPa):≥245(25)伸(shen)長率 δ5 (%):≥25斷(duan)面(mian)收縮率 ψ (%):≥5,硬度(du)(Hardness) :未熱處理(processing),≤156HB,試(shi)樣(yang)尺寸(cun):試(shi)樣(yang)尺寸(cun)25mm 20#無縫鋼管現貨 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
一般用途的(de)(de)無(wu)縫鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)由(you)普(pu)通的(de)(de)碳素結構鋼(gang)(gang)(gang)、低合金結構鋼(gang)(gang)(gang)或合金結構鋼(gang)(gang)(gang)軋制,產(chan)量最多,主要用作(zuo)輸送流體的(de)(de)管(guan)(guan)(guan)(guan)道或結構零件。最小±0.50 mm D3 ±0.75%.最小±0.30 mm D4 ±0.50%。最小±0.10 mm 無(wu)縫鋼(gang)(gang)(gang)管(guan)(guan)(guan)(guan)工藝( technology)流程衛生(hygienism)級(ji)鏡面(mian)管(guan)(guan)(guan)(guan)工藝( technology)流程:管(guan)(guan)(guan)(guan)坯(pi)——檢(jian)(jian)(jian)驗(yan)——剝皮——檢(jian)(jian)(jian)驗(yan)——加(jia)熱(heating )——穿(chuan)孔——酸(suan)(suan)(Acerbity)洗(xi)(xi)——修磨——潤滑(hua)(lubrication)風(feng)干(gan)(gan)——焊(han)頭(tou)——冷(leng)拔——固溶處理(processing)——酸(suan)(suan)(Acerbity)洗(xi)(xi)——酸(suan)(suan)洗(xi)(xi)鈍(dun)化(Inactivation)——檢(jian)(jian)(jian)驗(yan)——冷(leng)軋——去油——切頭(tou)——風(feng)干(gan)(gan)——內拋(pao)光(guang)(guang)(解釋:磨擦使物體(如(ru)金器(qi)(qi))光(guang)(guang)滑(hua)的(de)(de)過(guo)程)——外(wai)拋(pao)光(guang)(guang)(解釋:磨擦使物體(如(ru)金器(qi)(qi))光(guang)(guang)滑(hua)的(de)(de)過(guo)程)——檢(jian)(jian)(jian)驗(yan)——標識——成(cheng)品(pin)包裝(packaging) 工業管(guan)(guan)(guan)(guan)工藝流程 管(guan)(guan)(guan)(guan)坯(pi)——檢(jian)(jian)(jian)驗(yan)——剝皮——檢(jian)(jian)(jian)驗(yan)——加(jia)熱(heating )——穿(chuan)孔——酸(suan)(suan)洗(xi)(xi)——修蘑——潤滑(hua)(lubrication)風(feng)干(gan)(gan)——焊(han)頭(tou)——冷(leng)拔——固溶處理——酸(suan)(suan)洗(xi)(xi)——酸(suan)(suan)洗(xi)(xi)鈍(dun)化(Inactivation)——檢(jian)(jian)(jian)驗(yan)