http://www.ec21.com/ec-market/aisi 4140.html http://chenghang.en.ec21.com/Alloy_Steel_Bar--2335697_2675555.htmlDiameters:200mm---1000mm Length: 3000mm--6000mm and up as customer's request. Steel Grades: AISI ,SAE 4130,4140, 4340 A20091221 http://jessica118.en.ec21.com/Forged_Steel_Bar--_3912943.htmlAISI 4140 for instance with the diameter range from 150mm to 800mm of round bar ,120-500mm of flat and square steel and20091102 http://will0828.en.ec21.com/Screws--3656709_3657182.htmlAISI 4140) 3)Cr12MoV(JIS SKD-11) 4)4Cr5MoSiV1(JIS SKD-61) technical parameters: Nitrided Hardness: HV 900-1000 Nitr20090815 http://saleservice.en.ec21.com/Drilling_Pipe_Forging_Part--3653069_3625065.html ?e could supply all kinds of drilling pipes forging, we choose excellent alloy steel?ISI 4130,AISI 4140, AISI 4330,AIS20090707 http://professionalvalve.en.ec21.com/High_Pressure_Gate_Valve--3041907_3649436.htmlAISI 4140 Seat: AISI 4140 Stem: AISI 4140 Packing: HYDRIN Gland bushing: A 105 Std and nuts: A193b7/A194 2H full therea20090705 http://fancynw.en.ec21.com/Stabilizer--3153862_3155364.html Stabilizer Material: AISI 4145H, AISI 4145H MOD Alloy Steel, AISI 4140-4142, AISI 4340 Specification: OD: 6 -28 We of20090622 http://rolexmetal.en.ec21.com/API_5L_X65_PSL2_Sour--2608939_3592351.htmlAISI/SAE 4130 Seamless Tubes & Pipes, AISI/SAE 4140 Seamless Tubes & Pipes, AISI/SAE 4340 Seamless Tubes & Pipes, ASME 20090606 http://hssteelbiz.en.ec21.com/Alloy_Steels--8_3370882.htmlAISI 4140 , 4142 , 501 , GR. 1 , GR. 2 , 4340 , 9840 , E 4340 , 4337 , 4340 DIN 42CrMo4 , 40CrMoV4.7 , 12CrMo19.5 , C2220090226 http://joyeyuan.en.ec21.com/Forged_Steel_Round_Bar_AISI--2617815_2668320.htmlmachined / turned peeled . AISI 1020,1035,1045,5150,5140,4137,4140,4340, H13, etc. pls email me: run1203 (at ) 163.com20081212 http://shdayi.en.ec21.com/Alloy_Steel_Bar--1652839_2681662.htmlDiameters:100mm---1000mm Length: 3000mm--6000mm and up as customer's request. Steel Grades: AISI ,SAE 4130,4140, 4340 A20080320 http://luhuanlu.en.ec21.com/Casting--2624267_2624268.htmlAISI ,1.4581,1.4408,1.4122,1.4120 in DIN, SCS13,SCS14 in JIS belonged to stainless steel , 8630,4340,4140 in AISI belon20080225 http://hanresco.en.ec21.com/Hot_Finished_Steel_Bars--145439_145441.htmlAISI 4131, 4135, 4140,ASTM A 193 B7(*) JIS G 4105 SCM 415, SCM435, SCM440 BS 708M20, 34CrMo4, 708M40 - Spring Steels 20071115 http://karmasteel.en.ec21.com/King_PIN_2_Dia--1461378_1461379.htmlKing Pins are forged from quality alloy Cr-Mo Steel (42 CrMo4 / AISI-4140), rough machined and heat treated (hardened a20060815 http://spritltd.en.ec21.com/Gears_Gearboxes--972825_972826.htmlMain Products : Precision forged gears Precision machined gears Gear-boxes Material : AISI: 1035,1040,4140,4320,4340,8620070122 http://liguojun.en.ec21.com/C_Clamps--1896931_1898665.htmlManufacturing: Deep forged of AISI 4140 chromium-molybdenum Alloy Steel Hardess:HRC38DEGREE+-2 SURFACE: PHOSPHATE TREAT20070427