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AISI/ASTM 4340 JIS Sncm439, BS 816m40 Unsg43400 AISI 40crnimo Rolled Forged Round Steel Bar
AISI/ASTM 4340 JIS Sncm439, BS 816m40 Unsg43400 AISI 40crnimo Rolled Forged Round Steel Bar
AISI/ASTM 4340 JIS Sncm439, BS 816m40 Unsg43400 AISI 40crnimo Rolled Forged Round Steel Bar
AISI/ASTM 4340 JIS Sncm439, BS 816m40 Unsg43400 AISI 40crnimo Rolled Forged Round Steel Bar
AISI/ASTM 4340 JIS Sncm439, BS 816m40 Unsg43400 AISI 40crnimo Rolled Forged Round Steel Bar
AISI/ASTM 4340 JIS Sncm439, BS 816m40 Unsg43400 AISI 40crnimo Rolled Forged Round Steel Bar

AISI/ASTM 4340 JIS Sncm439, BS 816m40 Unsg43400 AISI 40crnimo Rolled Forged Round Steel Bar

Min.Order: 1
Product origin: Wuxi, Jiangsu, China
Infringement complaint: complaintComplaint
US$ 400 ~ 500

Description
Carbon Steel Round Bar is divided into three types: hot rolled, forged and cold drawn. The specification of hot-rolled round steel is 5.5-250mm. Among them: 5.5-25mm small round steel is mostly supplied in straight bars, which are often used as steel bars, bolts and various mechanical parts; round steel larger than 25mm is mainly used to manufacture mechanical parts and seamless steel pipe billets.

Carbon Steel Round Rod/Bar
Material GradeQ195,Q215 A,Q215 B,Q235 A,Q235 B,Q235 C,
Q235D,Q275,Q275B,Q275C,Q275D,Q295,Q345,Q390,Q420, Q460,
SS330,SS400,SS490,SS540,A36,1,GR.36,50(245),55(380),42(290),
60(415),65(450),S185(1.0035),S235JO(1.0114), S235JR(1.0038),
S235J2(0.0117),S275JR(1.0044),S275JO(1.10143),S355JO(1.0553),
E295(1.0050),E335(1.0060), S235J2W(1.861),S355J2W(1.8965),10#,
15#20#
StandardGB,JIS,ASTM,DIN
Diameter5-120mm or as required
Length300mm-1000mm and customized.
SurfaceBlack, Pickled, Mill, Poilshed
TechniqueElectroslag remelting and Heat treatment
Applicationgeneral engineering structure , cars, bridges, ships, boilers ,pressure vessels
Trade TermsEXW,FOB,CIF CFR
Loading PortShanghai port, Tianjin port, Qindao port
Payment terms1) 30% deposit by T/T, the balance against copy of B/L by T/T.
2) 30% deposit by T/T, the balance by L/C at sight.
3) 100% L/C at sight.
MOQ1Ton
Packing DetailStandard export package:Wooden pallet +paperboard +steel strip(Customized requirements are accepted)
Delivery time1.Usually,within10-20days after receiving deposit or LC.
2.According to the order quantity
SamplesFree samples are provided but the fright is borne by the buyer

1: 4340 steel introduction
AISI 4340 steel is a medium carbon, low alloy steel known for its toughness and strength in relatively large sections. AISI 4340 is also one kind of nickel chromium molybdenum steels. 4340 alloy steel is generally supplied hardened and tempered in the tensile range of 930 - 1080 Mpa. Pre hardened and tempered 4340 steels can be further surface hardened by flame or induction hardening and by nitriding. The 4340 steel has good shock and impact resistance as well as wear and abrasion resistance in the hardened condition. AISI 4340 steel properties offer good ductility in the annealed condition, allowing it to be bent or formed. Fusion and resistance welding is also possible with our 4340 alloy steel. ASTM 4340 material is often utilized where other alloy steels do not have the hardenability to give the strength required. For highly stressed parts it is excellent choice. AISI 4340 alloy steel can also be machined by all customary methods.
 
2: 4340 Steel equivalent
CountryJapanGermanyBritainUSA
StandardJIS G4103EN10250BS970ASTM A29
GradeSNCM43936CrNiMo4/1.6511EN24/817M404340
 
3: 4340 steel chemical composition
GradeCSiMnPSCrMoNi
43400.38-0.430.15-0.350.6-0.80.0350.040.7-090.2-0.31.65-2.0
36CrNiMo40.32-0.40.40.5-0.80.0350.0350.9-1.20.15-0.3 
EN240.36-0.440.1-0.40.45-0.70.0350.041.0-1.40.2-0.351.3-1.7
SNCM4390.36-0.430.15-0.350.6-0.90.030.030.6-1.00.15-0.31.6-2.0
 
4: 4340 steel mechanical properties 
  The mechanical properties mainly include tensile strength, yield strength, elongation, area or reduction, hardness, impact value, non-metalic inclusion etc. Different heat treatment, the mechanical properties will be different, such as normalized, tempered, QT. If you want to know the properties, kindly contact the salesman.

5: 4340 steel overviews
SizeRoundDia 6-1200mm
Plate/Flat/BlockThickness
6mm-500mm
Width
20mm-1000mm
Heat treatmentNormalized ; Annealed ; Quenched ; Tempered
Surface conditionBlack; Peeled; Polished; Machined; Grinded; Turned; Milled
Delivery conditionForged; Hot rolled; Cold drawn
TestTensile strength, Yield strength, elongation, area of reduction, impact value, hardness, grain size, ultrasonic test, US inspection, magnetic particle testing, etc. 
Payment termsT/T;L/C;/Money gram/ Paypal
Trade termsFOB; CIF; C&F; etc..
Delivery time30-45 days
Application4340 alloy steels are used for aircraft landing gear, automotive, oil and gas drilling, warm and cold forming, machine building, transfer systems like power transmission gears and shafts, general engineering industries and structural use applicatios such as heavy duty shafts, gears, axles, spindles, couplings, pins, chucks, molds and so on.

6: Delivery condition
For hot forged rolled bar, usually the delivery condition is hot forged or rolled, annealed/QT, rough turned/Black surface.
For hot forged or hot rolled bar, usually the delivery condition is hot rolled, annealed/QT, Black surface.
For hot forged plate, usually the delivery condition is hot forged, annealed/QT, milled surface/Black surface
For hot rolled plate, usually the delivery condition is hot rolled, annealed/QT, black surface.

Commen steel round bar category,grade,sizes and standard:
CategoryGradesSizesStandard
Carbon structure steelQ195, Q215, Q235, Q27516mm-250mmGB/T700-2006
Low alloy high strength structure steelQ295, Q345, Q390, Q420, Q46016mm-250mmGB/T1591-2008
Prime Carbon structure steel10#, 20#, 35#, 45#, 60#, 20Mn, 65Mn, B2, B3, JM20, SH45,S45C, C4516mm-250mmGB/T699-1999
Alloy structure steel30Mn2, 40Mn2, 27SiMn, 42Crmo, 20Cr,40Cr,20CrMo, 35CrMo, 20CrMnTi, 30CrMnTi, 20MnVB, 20MnTiB, 45MnV, 20CrNiMo, Q345B, 35MnBM,40MnB,36Mn2V,   16mm-250mmGB/T3077-1999
Spring Steel65Mn, 60Si2Mn, 50CrVA16mm-250mmGB/T1222-84
Bearing SteelGCr15, GCr15GD,55SiMoV16mm-250mmGB/T18254-2002
Structural steels subject to end-quench hardenability requirements20CrMnTi, 30CrMnTi, 20Cr, 40Cr, 30CrMo, 42CrMoA, 27SiMn, 40Mn2H, 20CrNiMo, 40Mn2, q345b,35MnBM, 40MnB,45MnV.16mm-250mmGB/T5216-2004
Oil wells structural steel37Mn5, 36Mn2V16mm-250mmQ/LYS248-2007
Marine anchor chain steelCM490, CM690, M30Mn216mm-250mm YB/T66-1987
GB/T18669-2002
GRADESIZE(MM)GRADESIZE(MM)
8#-10#∮16-29065Mn∮40-300
15#∮14-15045Mn2∮18-75
20#∮8-48060Si2Mn∮16-150
35#∮8-48020CrMnTi∮10-480
45#∮6.5-48020crmnTiB∮16-75
Q235B∮6.5-180GCr15∮16-400
40Cr∮8-480ML35∮8-150
20Cr∮10-480T8-T13∮8-480
42CrMo∮12-480Cr12∮16-300
35CrMo∮12-480Cr12MoV∮16-300
20CrMo∮12-3003Cr2W8V∮16-300
38CrMoAL∮20-30045Cr50Cr∮20-300
5CrMnMo∮20-45020CrMnMo∮20-300
16Mn(Q345B)∮14-36540Mn2∮28-60
50Mn∮40-20035Cr∮55
15CrMo∮20-7515Mn∮32∮170
25#∮16-28040CrMnMo∮80-∮160
YF45MnV∮28-8020CrMnMo∮20-300
30#∮6.5-48027 SiMn∮20-350
30Crmo∮28Crwmn∮20-300
30CrmnTi∮16-300H13(4Cr5MoSiVi)∮20-300
60#∮210.∮26040crNimo∮20-400

Factory direct sale high quality carbon steel rods/bars
Carbon steel round bar can be used in many fields such as building, automobile, shipbuilding, petrochemical, machinery, medicine, food, electric power, energy, space, building and decoration, etc. It be made into mould template, mortise pin, column .This kind of steel have good mechanical property, is widely used in structural parts which may support stress alternation, especially made into some connecting rods, bolts, wheel gear.





Wuxi Jianbanghaoda Steel Co., Ltd. is a sophisticated manufacturer of steel products. It's located in Wuxi, which is the biggest production base and distribution center of steel products in China , it's also near to Shanghai. We have many faithful clients in Europe, South America, Mid-East, Asia and etc. We have a wide range of steel products, such as stainless steel, carbon steel, alloy steel and etc. The annual export volume is about 1000,000 tons. We promised almost all inquiry will be dealed with within 3 hours.  "Punctuality, Integrity, Humanization service" has always been the development principle that strictly adhered by our company and all stuff all the time.
At present, we have five finishing rolling production lines and two hot rolling production lines .  Further more advanced automatic width control system (AWC), automatic thickness control system (AGC), bending roll system, work roll channeling roll system and other effective measures are adopted to guarantee product quality. Well-equipped production lines and advanced control systems work together to make sure all the stainless steel products we made are in line with the national standards.
OUR SERVICE:
1.Provide free sample. 
2.We have full stock and can deliver within short time.
3.OEM and ODM order are accepted, Any kind of logo printing or design are available.
4.We offer you the different types of product.
5.Good Quality + Factory Price + Quick Response + Reliable Service, is what we are trying best to offer you.
6.All of our products are produced by our professional workman and we have our high-work-effect foreign trade team, you can
totally believe our service. 
After you choose:
1. We will count cheapest shipping cost and send it to your email.
2. Start production immediately after receiving the advance payment.
3.About 10-15 working days to complete the production, and then the customer side to pay the balance.



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