High-Quality 4140 Forged Steel Shaft Components for Global Buyers
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Product Highlights
- Premium Material Grades: Available in SCM440, SCM435, 4130, 4140, 4145, and 1.7225 forged steel bars.
- High Precision Tolerance: Rough machining diameter tolerance controlled within -0/+0.5mm for accuracy.
- Comprehensive Heat Treatment: Options include Qt, Normalized, Annealing, and Tempering for enhanced toughness.
- 100% Ultrasonic Inspection: Strict quality control via 100% UT inspection per SEP1921-84 and GR.3 standards.
- Wide Size Range: Round bars available from 16mm to 1000mm diameter for various applications.
- Fast Delivery Time: Standard delivery within 30 days after order confirmation for timely supply.
- Custom Packaging: Standard seaworthy packing or customized packaging as per customer requirements.
- Versatile Applications: Ideal for crankshafts, gears, and components in vehicles, engines, and machines.
Product Attributes
- Customization
- Available
- Type
- Round
- Standard
- AISI, ASTM, DIN, JIS, GB
- Model NO.
- forged parts
- Composition
- Alloy Steel or Carbon Steel
- Technique
- Forged
- Shape
- Bar
- Surface Treatment
- Rough Machining or Black Surface
- Special Use
- Cold Heading Steel, Mold Steel
- Application
- Structural Steel Bar
- Ready Stock Grade
- 1045 4140 Forged Steel Bar
- Delivery Time of New Goods
- 30days
- Heat Treatment
- Qt/Normalized/Annealing
- Rough Machining Diameter Tolerance
- -0/+0.5mm
- Transport Package
- Seaworthy Packaging
- Specification
- 200mm-1000mm
- Trademark
- Shandong
- Origin
- China
- Production Capacity
- 5000tons
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Product Description
Introducing the superior Forged Alloy Steel Round Bar 4140, engineered for excellence and durability.
Premium-grade 1.7225 steel, ensuring exceptional performance and reliability.
Expertly Hot Forging Steel Bars designed to withstand demanding applications.
High-precision Forged Parts, crafted for ultimate strength and resilience.
Top-tier SCM440, SCM435, 4130, 4140, 4145 forged bars, expertly manufactured to excel in every application.
1. Chemical Composition (%):
Round: Dia. 1
6
- 1000mm
16
mm - 3
5
0mm available with hot rolled supply condition;
200-1000mm available with forged supply condition.
3.
Delivery Condition : Hot rolled or forged, Peeled or black surface, annealed or QT for optimal performance.
4. Applications:
Ideal for statically and dynamically stressed components in vehicles, engines, and machines. Perfect for larger cross-sections, crankshafts, and gears.
5. Heat Treatment:
Soft Annealing: Heat to 680-720°C, cool slowly to ensure optimal material properties.
Hardness after annealing: Max. 241 HB for superior strength.
Hardening: 820 - 850 °C to achieve desired hardness.
Normalizing Temperature: 840-880°C for improved structural integrity.
Tempering: 540-680°C for enhanced toughness and stability.
6. Inspection: Comprehensive 100% Ultrasonic inspection according to test standards: SEP1921-84, GR.3 CLASS C/C.
7. Packing Situation: Standard seaworthy packing or customized as per customer requirements.
8. Delivery Time: 30 days after order confirmation, ensuring timely delivery.
9. Process: EAF+LF+VD (necessary) +UT+ Peeled (optional) +Turned (optional) + Heat Treatment (optional) to meet the highest quality standards.









About the Supplier
This supplier has been audited by SGS. Verify the report on the official SGS website with ID "QIP-ASR195945". Items marked "" are certified.
Company Profile
SHANDONG DAJIN METAL MATERIAL Co., Ltd. is a company of special steel stocklist&exporter, Dajin has been suppling high-quality metals to customers worldwide since 2010, with almost 10 years metal export experience, Dajin Metal focus on cold drawn bars in carbon&alloy in round, hex, and square that meet ASTM, SAE and JIS specifications and standards.
Who is the members of Dajin?
1. Professional steel technical staff
With the ability of metallurgical, rolling, forging, heat treatment, UT testing, metallographic analysis etc. Under this professional knowledge and testing capabilities, Dajin can provide the professional services to client from all over the world.
2. Rich resources of steel
In the aspect of resources and information, we have established cooperative relationship with many mills, either state-owned or private owned in China, such as: Baosteel, Shagang, HBIS, Tisco, Valin, Shansteel etc. Under this high quality steel resources, Dajin can provide the best quality based on client's target price.
3. Professional export staff
Dajin has professional export staff with 10 years steel export experience. It can provide GB, American standard, German standard, Japanese standard, industry standard and special steel product according to customer's special requirements. It can also provide customized service according to customer's requirement.
What's the products Dajin supply?
1. Black steel bars: Hot rolled round bar(dia: 16mm-350mm), forged steel bar(Dia: 200mm-1000mm), forged ring&forged parts(according to drawing), with over 1, 000 tons stock.
2. Precision finishing steel rod: Steel bar and steel pipe.
Main shape: Hex, round, square bar and flat; QT steel bar and turning bars. We have our own deep processing factory, heat treatment furnance and compelete inspection equipments.
Dajin always keep 1000-1500tons ready stock of cold darwn steel bar/hot rolled steel rod with grade 1215, 12L14, SUS303 Cu, SS400, 1020/1018, 1045 and 4140, size range 5mm-300mm. MOQ can be 2tons, average delivery time 10-15days. Welcome all client's order and sample request.
About Our Factory & Business Background
- Address
- Guanli Road, Fengcheng Industry Zone, Laicheng District, Laiwu, Shandong, China
- Terms of Payment
- LC, T/T, D/P, Western Union
- International Commercial Terms(Incoterms)
- FOB, CFR, CIF, FAS, DDP, CPT, FCA, EXW
- Average Lead Time
-
Peak Season Lead Time: one month
Off Season Lead Time: within 15 workdays - Nearest Port
- Qingdao port, Tianjin port, Shanghai port
Our Production Capability & Technical Expertise
Our Industry Experience & Global Business Record
- Export Year
- 2017-03-04
- Main Markets
- North America, South America, Southeast Asia, Africa, Oceania, Eastern Asia
FAQ
- What are the available material grades?
- We offer premium grades including SCM440, SCM435, 4130, 4140, 4145, and 1.7225 forged steel bars.
- What is the diameter tolerance for rough machining?
- The rough machining diameter tolerance is strictly controlled within -0/+0.5mm.
- What heat treatment options are available?
- We provide Quenching and Tempering (Qt), Normalizing, Annealing, and Tempering to meet specific performance needs.
- How is the quality inspected?
- We conduct 100% Ultrasonic inspection according to test standards SEP1921-84 and GR.3 CLASS C/C.
- What is the standard delivery time?
- The standard delivery time is 30 days after order confirmation.
- What are the available sizes for round bars?
- Round bars are available in diameters from 16mm to 1000mm, depending on the supply condition.
- What are the main applications for these forged bars?
- They are ideal for statically and dynamically stressed components in vehicles, engines, machines, crankshafts, and gears.
- Can the packaging be customized?
- Yes, we offer standard seaworthy packing or customized packaging as per customer requirements.
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