Peeling Surface 45# Alloy Steel Round Bar for Mold Making and Engineering Machinery
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Product Highlights
- High Strength Performance: Tensile strength 500-1100 MPa and yield strength 300-950 MPa for durability.
- Customizable Length: Lengths range from 1000mm to 12000mm, fully customizable to project specs.
- Multiple Surface Options: Offers polished, black, grinding, hot rolled, cold rolled, and peeled finishes.
- Strict Quality Control: Rigorous inspection of dimensions, composition, and mechanical properties.
- Versatile Applications: Ideal for machining, molds, shafts, structural components, and engineering.
- Flexible Packaging: Wooden pallets or custom packing according to specific customer requests.
- Fast Delivery: Strong inventory reserves ensure rapid response and precise matching delivery.
Product Attributes
- Customization
- Available
- After-sales Service
- Contact Supplier
- Warranty
- Contact Supplier
- Model NO.
- 45# Alloy Steel Round Bar
- Type
- Alloy Steel Bar
- Standard
- AISI, ASTM, GB, DIN, BS
- Technique
- Hot Rolled
- Application
- Structural Steel Bar, Tool Steel Bar, Die Steel Bar
- Surface Treatment
- Polished
- Alloy
- Alloy
- Special Use
- Mold Steel, Free Cutting Steel, Cold Heading Steel
- Surfance Finish
- Polished, Black, Grinding or as Demand
- Sample
- Sample Avaliable
- MOQ
- 5ton
- Packing
- Wooden Pallet or According to Customer's Request
- Transport Package
- Standard Packing
- Specification
- Customized
- Trademark
- Zunkai
- Origin
- China
- HS Code
- 72142000
- Production Capacity
- 100000 Tons Per Year
Product Images of Peeling Surface 45# Alloy Steel Round Bar for Mold Making and Engineering Machinery
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Product Description




Product Name | Round Bar | Tensile Strength (MPa) | 500 - 1100 MPa |
Material Grade | 45#, 40Cr, 42CrMo, Q235B, AISI 1045, AISI 4140, etc. | Yield Strength (MPa) | 300 - 950 MPa |
Diameter Range | Ø20mm - Ø800mm | Elongation (%) | 10 - 20% |
Length Range | 1000mm - 12000mm (customizable) | Impact Toughness (J) | ≥ 27J (some grades up to 47J) |
Surface Condition | Hot rolled (black), Cold rolled, Peeled, Turned, Polished, Drawn, Ground | Application Fields | Machining, Molds, Shafts, Structural Components, Engineering Equipment |
Tolerance Range | H9-H11 / ±0.5mm - ±2mm | Inspection Items | Dimension Inspection, Chemical Composition, Mechanical Properties, UT |
Heat Treatment | Annealed, Normalized, Quenched & Tempered | Packaging | Standard export packing |
Hardness (HRC) | 20 - 35 HRC (depending on heat treatment) | Delivery Condition | As rolled, heat-treated, cold drawn, rough machined |






We conduct strict quality testing on material composition, mechanical properties and internal defects to guarantee high stability, reliability and consistency of every product.
Only products that pass all inspections can be packaged and delivered, ensuring customers receive safe, qualified and high-performance steel products.









We are based in Shandong, China, start from 1993. Our company has 12 departments in Shandong, Suzhou and Guangzhou totally. There are more than 4000 employees here in our company. Our main products include hot rolled coils, cold-rolled coils, GI, PPGI, AFP 55% Al galvalume coil, stainless steel. We also export structural beams, steel pipes, aluminiun and cooper pipes etc. Our company's annual sales amount is around 100 million US dollars, we also entered into strategic partnership with Bao steel, Laiwu steel, Rizhao steel, Anfeng steel, HBIS etc. Our company has achieved ISO9001 quality certification system. Our main market is middle east, Southeast Asia, Africa, South America etc. Hope to start the good cooperations with friends all over the world!
Always a pre-production sample before mass production;
Always final Inspection before shipment;
Carbon steel products, Galvanized steel products, PPGI steel coil, Galvalume steel products, Stainless steel products, Steel structure, Prefabricated house; etc.
Accepted Delivery Terms: FOB,CFR,CIF,EXW,FAS,CIP,FCA,CPT,DEQ,DDP,DDU,Express Delivery,DAF,DES;
Accepted Payment Currency:USD,EUR,JPY,CAD,AUD,HKD,GBP,CNY,CHF;
Accepted Payment Type: T/T,L/C,D/P D/A,MoneyGram,Credit Card,PayPal,Western Union,Cash,Escrow;
Language Spoken:English,Chinese,Spanish,Japanese,Portuguese,German,Arabic,French,Russian,Korean,Hindi,Italian
About the Supplier
This supplier has been audited by BV. Verify the report on the official BV website with ID "MIC-ASR2451905". Items marked "" are certified.
Company Profile
Jinan Zunkai Materials Co., Ltd belongs to the Jinan Zunkai Group. Jinan Zunkai Group founded in 2008, with five branch companies and is well-funded. Our annual sales nearly one billion, about 300, 000 tons steel.
Our company is located in Jinan City, Shandong Province. We entered into a strategic partnership with Rizhao Steel, Jinan Steel, Laiwu Steel, Handan Iron and Steel, Anyang Iron and Steel, Maanshan Iron and Steel and other domestic large steel companies. Zunkai is the largest steel agent in Shandong Province, we also have ourselves steel manufacturing factory, and our stock always no less than 10, 000 tons.
Our company mainly engaged in: PPGI, galvanized steel, Roofing Sheet, AFP galvalume steel, stainless steel, steel pipes, H-beam, I-beam, angle, channel, flat steel, round steel, all profiles; Our own steel factory mainly produces seamless pipe, spiral pipe, square and rectangular tube, galvanized pipe and so on.
We always focused on the integration of resources, in line with the concept of win-win cooperation.
Zunkai regards moral integrity as fundamental, relying on advantages of resources, we will ensure the most reliable quality and very good prices.
Looking forward to be the best partner of different clients!
About Our Factory & Business Background
-
Business Type
- Trading Company
- Address
- No. 15 Lanxiang Road, Tianqiao District, Jinan, Shandong, China
-
Plant Area
- 2356 square meters
-
Number of Employees
- 50
-
Registered Capital
- 10,000,000 RMB
-
Terms of Payment
- LC, T/T, D/P, PayPal, Western Union, Small-amount payment
-
International Commercial Terms(Incoterms)
- FOB, CIF, CFR, EXW
-
Average Lead Time
-
Peak Season Lead Time: within 15 workdays
Off Season Lead Time: within 15 workdays -
Nearest Port
- Tianjin Port
-
Minimum Order Quantity
- 25 Tons
-
Supply Chain Partners
- 5
Our Production Capability & Technical Expertise
-
Main Products
- Roofing Sheet, Galvanized Steel, Galvalume Steel, Steel Plate, PPGI, H Beam, Angle Steel, Stainless Steel, Hot Steel Coil, Cold Steel Coil, Silicon Steel
-
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
- 2 people
Our Industry Experience & Global Business Record
-
Year of Establishment
- 2016-01-20
-
Export Year
- 8 Years
-
Main Markets
- Southeast Asia/ Mideast
-
Repeat Buyers Choice
- 50%~80%
-
Number of Foreign Trading Staff
- 39
-
Overseas Agent/Branch
- Yes
-
New Products Launched in Last year
- No
Our Certifications, Standards & Industry Recognition
-
Product Certification
- CE, RoHS
-
Cooperated with Fortune 500
- No
FAQ
- What is the minimum order quantity?
- The minimum order quantity is 5 tons.
- What are the available material grades?
- Available grades include 45#, 40Cr, 42CrMo, Q235B, AISI 1045, and AISI 4140.
- Can the surface finish be customized?
- Yes, surface finishes can be polished, black, ground, or customized as per demand.
- What heat treatment options are available?
- Options include annealed, normalized, and quenched & tempered treatments.
- Is sample availability supported?
- Yes, samples are available for quality verification before bulk orders.
- What standards does the steel comply with?
- The steel complies with AISI, ASTM, GB, DIN, and BS standards.
- What is the typical hardness range?
- Hardness ranges from 20 to 35 HRC, depending on the heat treatment applied.
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