20# 35# 45# 5mm 6mm 8m Alloy Steel Round Bar

Product Description

Product Display

Real Cases

Product Name	Alloy Steel 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

Visualization of performance parameters

We present it in a rigorous industrial array, precisely reflecting the digitalized commitment to the performance of our products. The stepped arrangement of different diameter specifications intuitively demonstrates our ability to provide precise size classification to meet diverse needs. The contrast between the blue high-temperature resistant coating and the industrial base color verifies the stable performance and excellent corrosion resistance and durability of the material under extreme conditions. Each steel rod is a high-load and high-pressure solution tailored for the heavy equipment and precision machinery fields.

Intelligent production lines - the cornerstone for ensuring stable quality in manufacturing

We have modern intelligent workshops, which are the birthplaces of outstanding performance. The highly automated and color-coded precision equipment in the picture, connected through orderly pipelines and conveyors, form an efficient and controllable closed-loop production system. The clean environment, professional lifting equipment and standardized layout jointly ensure that every process from raw materials to finished products is in the best condition. This is not only a display of production capacity, but also the fundamental guarantee for us to continuously output high-quality steel with stable performance and consistent batches.

Select the best talents - the guarantee of outstanding performance

"Prime Quality" is our most direct declaration of the material quality. In the picture, whether it is the bundled long pieces, the shiny round rods, or the neatly stacked profiles, their uniform color, dense texture and smooth surface are all direct manifestations of excellent metallurgical quality and rigorous production control. We firmly believe that outstanding end products start with top-quality raw materials. These carefully selected high-quality steel materials provide the most reliable performance foundation for the subsequent processing into key components with high strength, high toughness and fatigue resistance.

Large-scale warehousing - Instant response delivery capabilities

The three perspectives jointly confirm our strong inventory reserves and supply chain response capabilities. The large and neatly stacked piles on the left, the clear end markings on the upper right, and the orderly storage space on the lower right form a three-dimensional and efficient logistics map. This not only indicates that we can meet your bulk purchasing needs, but also means that we can achieve rapid and precise matching and delivery based on your specific requirements for materials, specifications, and conditions, ensuring that your project progress is not constrained by material supply.

strict dimensional inspection and quality control for each steel round bar.

The diameter, length, straightness and surface condition are accurately measured with professional measuring tools and testing equipment to ensure full compliance with international standards and customer requirements. 
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.

Standardized packaging - Unwavering quality assurance throughout the process

From the production line to the safe arrival at your workshop, our commitment to quality runs through the entire process. Standard stacking and clear labeling ensure traceability and ease of management in the complex logistics process. We understand that even the most outstanding product performance requires a perfect condition to realize its value. Therefore, we safeguard the last mile before the product arrives with nearly strict standards.

About US

JINAN ZUNKAI MATERIAL CO. LTD

FAQ

1. Who are we?
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!

2. How can we guarantee quality?
Always a pre-production sample before mass production;
Always final Inspection before shipment;

3.What can you buy from us?
Carbon steel products, Galvanized steel products, PPGI steel coil, Galvalume steel products, Stainless steel products, Steel structure, Prefabricated house; etc.

4. What services can we provide?
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