Free Forging Parts 30CrMo Scm430 4130 Hot Forged Rolled Steel Round Bar

• After-sales Service: 24 Hours on Line
• Warranty: Three Years
• Type: Alloy Steel Bar
• Standard: AISI, ASTM, GB, JIS, DIN, BS
• Technique: Forged
• Application: Structural Steel Bar, Tool Steel Bar, Die Steel Bar
• Model NO.: 4130
• Surface Treatment: Polished
• Alloy: Alloy
• Special Use: Mold Steel, Free Cutting Steel, Cold Heading Steel
• Payment Term: 30% Tt Deposit, Balance Against Bl Copy
• Length: 3000-5800mm
• Delivery Date: 30 Days
• Ex-Stock: No
• Ut Standard: Sep 1921-84 D/D
• Grain Size: ASTM E112
• Non-Metallic Inclusiton: ASTM E45
• Form: Round Bars/ Flat Bar / Blocks/ Tube
• Process: Eaf+Lf+Vd+Forged+Heat Treatment(Optional)
• Technology: Hot Rolled/ Forged/ Cold Drawn
• Heat Treatment: Normalized;Annealed ;Quenched ;Tempered
• Surface: Black; Peeled; Polished; Machined; Grinded; Turne
• Test: Ensile Strength, Yield Strength, Elongation
• Certificate: ISO/ Mill Certificate
• Transport Package: Seaworthy Package
• Specification: DIA 90-600
• Trademark: Qilu
• Origin: China
• HS Code: 7228400000
• Production Capacity: 400, 000ton/Year

Product Description

Product Description

Free Forging Parts 30CrMo SCM430 4130 Hot Forged Rolled Steel Round Bar

1: 4130 Steel Introduction
    AISI 4130 alloy steel is a medium carbon, low alloy steel in ASTM A29 standard. ASTM 4140 steel is also commonly referred to as a chromoly steel, or chrome moly steel, containing nominally 0.28-0.33% Carbon, 0.8-1.1% Chromium and 0.15-0.25% Molybdenum. It is similar to 4140 steel which has a higher carbon level (0.28-0.33%), giving 4130 material improved weldability, at the expense of through thickness strength. With the proper heat treatment it is also readily machined. Annealing ASTM 4130 alloy steel offers excellent ductility. AISI 4130 steel is usually supplied as round bar commonly in the hardened and tempered condition.
 
2: 4130 Steel Equivalent

Country	British	USA	Japan	BS
Standard	BS 970	ASTM A29	JIS G4105	EN10083
Grade	708A25/708M25	4130	SCM430	25CrMo4/1.7218

 
3: 4130 Steel Chemical Composition

Grade	C	Si	Mn	P	S	Cr	Mo	Ni
4130	0.28-0.33	0.15-0.35	0.4-0.6	0.035	0.04	0.8-1.1	0.15-0.25	/
25CrMo4	0.22-0.29	0.4	0.6-0.9	0.025	0.035	0.9-1.2	0.15-0.30	/
SCM430	0.28-0.33	0.15-0.35	0.6-0.85	0.03	0.03	0.9-1.2	0.15-0.30	/

 
4: 4130 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: 4130 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	4130 are used for Commercial aircraft, aircraft engine mounts, military aircraft, automotive, machine tools, hydraulic tools, auto racing, aerospace, oil and gas industries as forged valve bodies and pumps, agricultural and defense industries etc.

 

6: Heat Treatment
Annealing 
    Annealing of 4130 steel forgings may be carried out by transferring the part straight from the forging operation to a furnace held at a suitable temperature, around 860o C (1575 o F) for annealing, holding for a suitable time then furnace cooling. In this way a structure suitable for machining may be obtained. This treatment is best used for parts with simple shapes. If the 4130 forging is such that some sections will finish much colder than others then a uniform structure will not be obtained and for best results a spheroidizing anneal at around 750 o C (1380 o F) may be used. It is safe to say that experience alone will decide the best type of annealing treatment to be used prior to machining.
    It should then be cooled in the furnace at a rate of less than 50 F per hour down to 900 F, followed by air cooling from 900 F.
Normalizing
    The nominal normalizing temperature for 4130 is 900 o C (1650 o F) followed by the 1600 F soak and oil quench, but production experience may necessitate a temperature either 50 o F (10 o C) above or below this figure. In fact when forgings are normalized before, for example, carburizing or hardening and tempering, the upper range of normalizing temperatures is used. When normalizing is the final heat treatment, the lower temperature range is used.
Hardening
    The steel 4130 should be austenitized - i.e. all micro constituents transformed to austenite - at 1500 to 1600 o F (815 to 870 o C). The actual austenitizing temperature is a function of chemical composition within the analysis range, section size and cooling method. Smaller sections of 4130 might be quenched in oil, heavier sections in water.
Tempering 
    The actual tempering temperature will depend on what required properties are needed. Alloy steel 4130 is tempered at between 398 oC -565 oC (750 F and 1050 F), depending upon the strength level desired. The lower the tempering temperature the greater the strength.

 

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

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.



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.


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.




Q1:Are you trading company or manufacturer ?
We are professional manufacturer for many years. we can provide a wide range of steel products.
Q2:What is alloy steel round bar export packing?
Usually bundling for large diameter,small diameter bars in bulk or as customer's demand.
Q3.What is your MOQ?
We accept small order,if it is stock,any quantities can be accepted.
Q4.What is your lead time?
Depends actual order,around 20-35 days,or negotiation.
Q5.Can you supply sample?
Yes,we can.Sample fee according to your size.
 Q6:What certificates do you have?
ISO, ABS, BV, CCS, Dnv, Lr, Gl, Mill Certificate
Q7: How can I get your quotation as soon as possible?
The email and fax will be checked within 24 hours,meanwhile,the Skype,Wechat and WhatsApp will be online in 24 hours.Please send us your requirement,we will work out a best price soon.


Any interests in our company and products, please feel free to contact us for quotation. We warmly welcome you to our factory.


Hunan Qilu Industrial CO., LTD
Web: qilusteel.en.made-in-china.com