Premium 4145H Alloy Steel Flat Bar for Industrial Use
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Product Highlights
- High-Strength Alloy Steel: AISI 4145H grade with 120 KSI minimum yield strength for drilling equipment.
- Comprehensive Mechanical Properties: Tensile strength up to 140,000 PSI, hardness 30-36 HRC, and 14% elongation.
- Full Customization Options: Supports customization from samples, designs, and flexible minor adjustments.
- Multiple Surface Treatments: Available in Black or Machined finishes to meet specific application needs.
- Strict Quality Inspection: 100% visual and function inspection with traceable raw materials.
- Diverse Size Range: Hot rolled diameters 50-130mm and forged diameters 100-1300mm available.
- ISO 9001 Certified: Manufacturing process certified under ISO9001:2015 management system.
- Fast Lead Time: Consistent one-month delivery time for both peak and off-peak seasons.
Product Attributes
- Customization
- Available
- Type
- Round
- Standard
- AISI, ASTM, DIN, JIS, GB, BS
- Model NO.
- 4145h
- Composition
- Check Detailed Description
- Technique
- hot rolled,forged
- Shape
- Bar
- Surface Treatment
- Black, Machined
- Special Use
- High-strength Steel Plate, Wear Resistant Steel, Silicon Steel, Cold Heading Steel, Free Cutting Steel, Mold Steel
- Application
- Tool Steel Bar
- Transport Package
- Nude Packing
- Specification
- Diameter: 50-1300mm
- Trademark
- Ningbo Ningshing
- Origin
- China
Product Images of Premium 4145H Alloy Steel Flat Bar for Industrial Use
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Premium 4145H Alloy Steel Flat Bar for Industrial Use -
Premium 4145H Alloy Steel Flat Bar for Industrial Use -
Premium 4145H Alloy Steel Flat Bar for Industrial Use -
Premium 4145H Alloy Steel Flat Bar for Industrial Use -
Premium 4145H Alloy Steel Flat Bar for Industrial Use -
Premium 4145H Alloy Steel Flat Bar for Industrial Use -
Premium 4145H Alloy Steel Flat Bar for Industrial Use
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Product Description
4145H 120 KSIasper
AISI 4145H 120 KSI Alloy Steel Bar for Drilling Collar, Drill Pipe, Square Kelly, Lifting Sub, Stabilizer
Dimensions
Hot Rolled Round:dia.50-130 mm.
Forged Round: dia.100-1300 mm.
Delivery Condition
EAF+LF+VD, Hot Rolled or Forged, Machined, Q+T, UT 100% Passed.
Chemical Composition(%)
| C | Si | Mn | P | S | Cr | Mo | Ni | Cu |
| 0.42-0.49 | 0.15-0.35 | 0.80-1.15 | ≤ 0.020 | ≤ 0.025 | 0.75-1.20 | 0.15-0.45 | ≤ 0.25 | ≤ 0.30 |
Mechanical Properties
| Tensile Strength PSI (MPa) | Yield Strength PSI (MPa) | Elongation | Reduction of Area | Hardness | |
| Min. | 140000 | 120000 | 14% | 45% | 30 HRC (285 HB) |
| Max. | ------ | ------ | ------ | ------ | 36 HRC (341 HB) |
Characteristics
AISI / SAE 4145H grade is a low-alloy steel containing chromium and molybdenum as strengthening agents. The steel has good fatigue strength and impact toughness in low temperature, weldability and machinability.
Applications
This low-alloy steel is used in heat treated condition with 120 KSI minimum yield strength for oil and gas equipments of well drilling, wellhead, Christmas tree, etc.
About the Supplier
This supplier has been audited by BV. Verify the report on the official BV website with ID "MIC-ASR2531730". Items marked "
" are certified.
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Company Profile
With over 30 years of development, Ningshing Precision Machinery Co., Ltd. Upholds the philosophy of "Co-create, Win-win, Sharing" and focuses on delivering reliable materials, integrated manufacturing solutions and advanced equipment to global industrial partners. We operate across four core sectors:
▪ Special Steel Production & Distribution
▪ Integrated Die & Mould Service
▪ Precision Manufacturing Solutions
▪ Circular Sawing & Milling Machines
Leveraging a full industrial chain, from premium tool steel, precision machining and vacuum heat treatment to intelligent machine tool R&D and technical support, we provide end-to-end solutions that enhance efficiency, accuracy and long-term performance.
Today, Ningshing is committed to continuous innovation, high-quality manufacturing and customer-driven value creation. We serve global industries including tooling, mold making, machining, machinery and high-precision metal processing, helping customers achieve higher productivity, better efficiency and stronger competitiveness.
About Our Factory & Business Background
-
Business Type
- Manufacturer/Factory & Trading Company
- Address
- No. 25 Hongxiang Rd a Area Industry, Hongtang Jiangbei, 315033, Ningbo, Zhejiang, China
-
Plant Area
- 26599 square meters
-
Number of Employees
- 582
-
Registered Capital
- 60,000,000 RMB
-
Terms of Payment
- LC, T/T, D/P, PayPal, Western Union
-
International Commercial Terms(Incoterms)
- CIF, FOB, CFR, EXW
-
Average Lead Time
-
Peak Season Lead Time: one month
Off Season Lead Time: one month -
Nearest Port
- Ningbo Port
-
Minimum Order Quantity
- USD 1000
-
Supply Chain Partners
- 12
Our Production Capability & Technical Expertise
-
Main Products
- Tool Steel, Alloy Steel, Mold Base, CNC Circular Sawing Machine, Mechanical Parts
-
Production Lines
- 8
-
Production Machines
- Cutting Facility, CNC Machining Center, Grinding Facility, Heat Treatment Facility, Saw Milling Facility
-
QA/QC inspectors
- 21 people
-
Inspection Type for Finished Products
- 100% inspection(Visual inspection & Function inspection)
-
Inspection Method for Finished Products
- Have instructions and uniformly followed
-
Customization Options
- Customization from Samples, Customization from Designs, Full Customization, Minor Customization, Flexible customization
-
ODM Service Available
- Yes
-
OEM Service Available
- Yes
-
R&D Engineers
- 15 people
-
Traceability of Raw Materials
- Yes
Our Industry Experience & Global Business Record
-
Year of Establishment
- 2003-06-25
-
Export Year
- 18 Years
-
Main Markets
- North America, South America, Europe, Southeast Asia/ Mideast, East Asia(Japan/ South Korea)
-
Repeat Buyers Choice
- 80%~100%
-
Number of Foreign Trading Staff
- 27
-
Overseas Agent/Branch
- Yes
-
New Products Launched in Last year
- Yes
Our Certifications, Standards & Industry Recognition
-
Management System Certification
- ISO9001:2015
-
Cooperated with Fortune 500
- Yes
FAQ
- What is the minimum yield strength of this steel?
- The AISI 4145H grade offers a minimum yield strength of 120 KSI.
- Can I request custom dimensions or designs?
- Yes, we offer full customization, minor customization, and flexible options based on samples or designs.
- What are the available delivery conditions?
- Products are delivered via EAF+LF+VD, Hot Rolled, Forged, Machined, or Q+T, with 100% UT passed.
- What are the payment terms accepted?
- We accept LC, T/T, D/P, PayPal, and Western Union.
- What is the minimum order quantity?
- The minimum order quantity is USD 1000.
- How long does it take to deliver?
- The average lead time is one month, regardless of the season.
- Is the product suitable for oil and gas equipment?
- Yes, it is specifically designed for well drilling, wellhead, and Christmas tree equipment.
- What certifications does the company hold?
- Our management system is certified under ISO9001:2015.
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