• 4340 Forged Steel Bar 817m40 36CrNiMo4 34CrNiMo6 1.6582 1.7225 42CrMo4 4140 4130 8620 080m40 070m20 1045 1.1191 C45 S45c 25crmo4
  • 4340 Forged Steel Bar 817m40 36CrNiMo4 34CrNiMo6 1.6582 1.7225 42CrMo4 4140 4130 8620 080m40 070m20 1045 1.1191 C45 S45c 25crmo4
  • 4340 Forged Steel Bar 817m40 36CrNiMo4 34CrNiMo6 1.6582 1.7225 42CrMo4 4140 4130 8620 080m40 070m20 1045 1.1191 C45 S45c 25crmo4
  • 4340 Forged Steel Bar 817m40 36CrNiMo4 34CrNiMo6 1.6582 1.7225 42CrMo4 4140 4130 8620 080m40 070m20 1045 1.1191 C45 S45c 25crmo4
  • 4340 Forged Steel Bar 817m40 36CrNiMo4 34CrNiMo6 1.6582 1.7225 42CrMo4 4140 4130 8620 080m40 070m20 1045 1.1191 C45 S45c 25crmo4
  • 4340 Forged Steel Bar 817m40 36CrNiMo4 34CrNiMo6 1.6582 1.7225 42CrMo4 4140 4130 8620 080m40 070m20 1045 1.1191 C45 S45c 25crmo4

4340 Forged Steel Bar 817m40 36CrNiMo4 34CrNiMo6 1.6582 1.7225 42CrMo4 4140 4130 8620 080m40 070m20 1045 1.1191 C45 S45c 25crmo4

Type: Alloy Steel Bar
Standard: AISI, ASTM, GB, JIS, DIN, BS
Technique: Forged
Application: Tool Steel Bar
Surface Treatment: Polished
Alloy: Alloy
Samples:
US$ 10/kg 1 kg(Min.Order)
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Basic Info.

Model NO.
4340
Special Use
Mold Steel
Length
1000-12000
Transport Package
Bulk Package
Specification
100-1200MM
Trademark
Qilu
Origin
China
HS Code
722840
Production Capacity
500, 000mt/Year

Product Description

EN24 4340 36CrNiMo4 1.6511 SNCM439 Hot forged steel round bar

4340 Forged Steel Bar 817m40 36CrNiMo4 34CrNiMo6 1.6582 1.7225 42CrMo4 4140 4130 8620 080m40 070m20 1045 1.1191 C45 S45c 25crmo4

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
Country Japan Germany Britain USA
Standard JIS G4103 EN10250 BS970 ASTM A29
Grade SNCM439 36CrNiMo4/1.6511 EN24/817M40 4340
 
3: 4340 steel chemical composition
Grade C Si Mn P S Cr Mo Ni
4340 0.38-0.43 0.15-0.35 0.6-0.8 0.035 0.04 0.7-09 0.2-0.3 1.65-2.0
36CrNiMo4 0.32-0.4 0.4 0.5-0.8 0.035 0.035 0.9-1.2 0.15-0.3  
EN24 0.36-0.44 0.1-0.4 0.45-0.7 0.035 0.04 1.0-1.4 0.2-0.35 1.3-1.7
SNCM439 0.36-0.43 0.15-0.35 0.6-0.9 0.03 0.03 0.6-1.0 0.15-0.3 1.6-2.0
 
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
Size Round Dia 6-1200mm
Plate/Flat/Block Thickness
6mm-500mm
Width
20mm-1000mm
Heat treatment Normalized ; Annealed ; Quenched ; Tempered
Surface condition Black; Peeled; Polished; Machined; Grinded; Turned; Milled
Delivery condition Forged; Hot rolled; Cold drawn
Test Tensile strength, Yield strength, elongation, area of reduction, impact value, hardness, grain size, ultrasonic test, US inspection, magnetic particle testing, etc. 
Payment terms T/T;L/C;/Money gram/ Paypal
Trade terms FOB; CIF; C&F; etc..
Delivery time 30-45 days
Application 4340 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.


4340 Forged Steel Bar 817m40 36CrNiMo4 34CrNiMo6 1.6582 1.7225 42CrMo4 4140 4130 8620 080m40 070m20 1045 1.1191 C45 S45c 25crmo4

Hunan Qilu Industrial Co., Ltd has the capacity to forge round steel, steel flat, square steel, module, shaft and roller, etc. The main specifications of the products include Φ80-1000mm forging materials and 80-1200mm square billets and which the maximum piece weight can reach 50T.


4340 Forged Steel Bar 817m40 36CrNiMo4 34CrNiMo6 1.6582 1.7225 42CrMo4 4140 4130 8620 080m40 070m20 1045 1.1191 C45 S45c 25crmo4


4340 Forged Steel Bar 817m40 36CrNiMo4 34CrNiMo6 1.6582 1.7225 42CrMo4 4140 4130 8620 080m40 070m20 1045 1.1191 C45 S45c 25crmo4

Hunan Qilu Industrial Co., Ltd were already engaged in exporting steel for 11 years, could supply a great variety of hot forged, hot rolled and cold drawn Steels,  including engineering steel, cold work tool steel, hot work tool steel, plastic mold steel, spring steel, high speed steel, stainless steel etc., besides Qilu Industrial also has their own heating treatment shop and machining shop to provide heating and cutting service.

Since 2008 year, Hunan Qilu Industrial has the right to export all FORGED STEEL behalf of Qilu Speical Steel Co.,ltd which is specialized in smelting and forging of special steel since 1965 year, now Qilu special steel is one of the biggest manufacturer of forged product in China.The forged products are used in Automotive, Aerospace, Power Generation, Oil & Gas, Transportation and Industrial. We already set up the warehouse in Wuxi and Dongguan city, more than 20000 tons ex-stock could be supplied with kinds of size.

Qilu Industrial is the professional one-stop steel manufacturer, stockist and exporter in China, our customers spread all over the world, include West Europe, North America, South America, Asia, Middle Asia, Africa, Australia, etc.

4340 Forged Steel Bar 817m40 36CrNiMo4 34CrNiMo6 1.6582 1.7225 42CrMo4 4140 4130 8620 080m40 070m20 1045 1.1191 C45 S45c 25crmo4



4340 Forged Steel Bar 817m40 36CrNiMo4 34CrNiMo6 1.6582 1.7225 42CrMo4 4140 4130 8620 080m40 070m20 1045 1.1191 C45 S45c 25crmo4

The company owns advanced special steel smelting facilities and forging processing equipments, the main steel-making equipment include 2 sets of 50t ultra-high power electric arc furnaces,2 sets of 60t LF refining furnaces,1 set of 60t vacuum degassing refining furnace and 4 sets of 1-20t electroslag re-melting furnaces.
The main forging equipments mainly include:3 sets of 5t electro-hydraulic hammers, 1 set of high-speed forging units of 800t,1600t,2000t and 4500t respectively.


4340 Forged Steel Bar 817m40 36CrNiMo4 34CrNiMo6 1.6582 1.7225 42CrMo4 4140 4130 8620 080m40 070m20 1045 1.1191 C45 S45c 25crmo4



4340 Forged Steel Bar 817m40 36CrNiMo4 34CrNiMo6 1.6582 1.7225 42CrMo4 4140 4130 8620 080m40 070m20 1045 1.1191 C45 S45c 25crmo4



4340 Forged Steel Bar 817m40 36CrNiMo4 34CrNiMo6 1.6582 1.7225 42CrMo4 4140 4130 8620 080m40 070m20 1045 1.1191 C45 S45c 25crmo4 4340 Forged Steel Bar 817m40 36CrNiMo4 34CrNiMo6 1.6582 1.7225 42CrMo4 4140 4130 8620 080m40 070m20 1045 1.1191 C45 S45c 25crmo4


Hunan Qilu Industrial CO., LTD
Web: qilusteel.en.made-in-china.com 
 
Tel: 86-731-85185768
Fax: 86-0731-85185771

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Diamond Member Since 2009

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Manufacturer/Factory
Registered Capital
2000000 RMB
Plant Area
1001~2000 square meters