JIANGSU MITTEL STEEL INDUSTRIAL LIMITED

China,Wuxi ,Jiangsu
Verified Supplier

Chat online Now



Leave a Message

we will call you back quickly!

Submit Requirement

Home>
Steel Round Bar>
Cold Drawn Alloy Steel Round Bar for Mechanical Engineering Applications

China Cold Drawn Alloy Steel Round Bar for Mechanical Engineering Applications





Cold Drawn Alloy Steel Round Bar for Mechanical Engineering Applications

MOQ： 1 Ton
Price： 800 - 1200 USD/Ton
Get Latest Price


Payment Terms	L/C, T/T, Western Union
Supply Ability	20Ton per week
Delivery Time	5 - 12 days based on the quantity
Packaging Details	standard packing for export
Products Name	Alloy Steel Round Bar
Diameter	10 - 450mm
Length	6m
Tech	Hot rolled
Service	Cutting
MOQ	1 Ton
Loading Port	Shanghai Port
Standard	ASTM EN GB
Brand Name	DELTA
Model Number	Alloy Steel
Certification	ISO
Place of Origin	China

View Detail Information

Inquiry by Email Get Latest Price

Chat online Now Ask for best deal

Explore similar products

ASTM A29/A29m Hot Rolled Alloy Steel Round Bars SAE4340 10-350mm

Chat online Now
DIN 1.8159 (25CrMoVr6-4) Alloy Steel Round Barr High-Temperature Strength &

Chat online Now
25Cr2MoVA Alloy Steel Round Bar Diameter 10 - 300mm Custom Cutting in Length

Chat online Now
EN DIN Standard 41CrAlMo7 Alloy Steel Round Bar Diameter 10 - 350mm SCM645 Alloy

Chat online Now

Product Details
Company Details

Product Specification


Payment Terms	L/C, T/T, Western Union	Supply Ability	20Ton per week
Delivery Time	5 - 12 days based on the quantity	Packaging Details	standard packing for export
Products Name	Alloy Steel Round Bar	Diameter	10 - 450mm
Length	6m	Tech	Hot rolled
Service	Cutting	MOQ	1 Ton
Loading Port	Shanghai Port	Standard	ASTM EN GB
Brand Name	DELTA	Model Number	Alloy Steel
Certification	ISO	Place of Origin	China
High Light	cold drawn alloy steel round bar ，mechanical engineering steel round bar ，high strength alloy steel bar

Cold Drawn Alloy Steel Round Bar for Mechanical Engineering Applications

Products Specification

Products Name	Alloy Steel Round Bar
Diameter	20 - 350 mm
Length	6m or custom cutting any length as request
Type	Hot Rolled
Brand	BAOSTEEL DELTA DONGBEI HUAXI SHAGANG.etc
MOQ	1 Ton
Loading Port	Shanghai Port
Packing	packing by steel wire rope
Deliver time	5 - 7 days for stock materials
Other Grade	Q195,Q235,10#,20#,35#,45#,Q215,Q345,12Cr1Mov,15CrMo ,20Cr,40Cr,20CrMo,35CrMo,42CrMo,40CrNiMo,GCr15,65Mn,50Mn, 50Cr,3Cr2W8V,20CrMnTi,25Cr2MoVA,5CrMnMo ,38CrMoAl, 30CrMnSiA,B16,31CrMoV9
Standard	ASTM GB EN DIN
Application	Structure and Industrial

Cold Drawn Alloy Steel Round Bar for Mechanical Engineering Applications

Product Overview

Our Cold Drawn Alloy Steel Round Bar is a high-precision engineered material specifically designed for demanding mechanical engineering applications where dimensional accuracy, surface integrity, and consistent mechanical properties are critical. Produced from premium alloy steel grades (compliant with GB/T 3077, ISO 683-1, ASTM A322, and EN 10083), the bars undergo a controlled cold drawing process—without subsequent heat treatment—to enhance strength, straightness, and surface finish while maintaining excellent machinability.

Ideal for manufacturing shafts, pins, spindles, gears, bushings, fasteners, and precision components in automotive, aerospace, robotics, hydraulic systems, and general machinery, this product eliminates or significantly reduces the need for secondary machining—saving time, cost, and material waste.

Key Advantages of Cold Drawing

✅ Improved Surface Finish: Smooth, scale-free surface with roughness as low as Ra 0.8–1.6 µm
✅ Tighter Dimensional Tolerances: Up to h8/h9 standard (custom h7 available) per ISO 286
✅ Enhanced Mechanical Properties: Increased tensile and yield strength due to strain hardening (up to 15–25% higher than hot-rolled equivalents)
✅ Excellent Straightness: Typically ≤ 0.3 mm/m, reducing alignment issues during assembly
✅ Consistent Cross-Section: Uniform diameter along the entire length
✅ Clean & Ready-to-Use: No decarburization or oxide scale—ideal for direct CNC machining or grinding

Common Grades & Chemical Composition

Grade (GB/T 3077)	AISI/SAE Equivalent	Key Alloying Elements (Typical %)	Primary Use Case
20Cr	5120	C: 0.17–0.24, Cr: 0.70–1.00	Case-hardened pins, small gears
40Cr	5140	C: 0.37–0.44, Cr: 0.80–1.10	Shafts, bolts, medium-stress parts
42CrMo4	4140	C: 0.38–0.45, Cr: 0.90–1.20, Mo: 0.15–0.25	High-strength axles, tool holders
35CrMo	4135	C: 0.32–0.40, Cr: 0.80–1.10, Mo: 0.15–0.25	Connecting rods, heavy-duty fasteners
20CrMnTi	8620	C: 0.17–0.23, Cr: 1.00–1.30, Mn: 0.80–1.10, Ti: 0.04–0.10	Carburized transmission gears

All grades feature low sulfur (S ≤ 0.025%) and phosphorus (P ≤ 0.025%) content for improved ductility and machinability.

Mechanical Properties (As Cold Drawn)

Grade	Tensile Strength (MPa)	Yield Strength (MPa)	Elongation (%)	Hardness (HB)	Typical Machinability
20Cr	540–690	≥345	≥16	156–207	Excellent
40Cr	785–930	≥590	≥12	217–269	Good
42CrMo4	850–1000	≥655	≥12	241–285	Moderate (requires sharp tools)
35CrMo	735–885	≥540	≥13	207–255	Good
20CrMnTi	590–735	≥390	≥15	163–217	Excellent (pre-carburizing)

Note: Cold drawing increases strength but slightly reduces ductility compared to annealed conditions. For maximum toughness, post-draw heat treatment (e.g., quenching & tempering) can be applied upon request.

Dimensional Specifications

Parameter	Standard Range	Custom Options Available
Diameter	6 mm – 100 mm	Up to 120 mm (subject to grade)
Length	2,000 – 6,000 mm	Cut-to-length (±1 mm tolerance)
Diameter Tolerance	h9 (standard), h8 (common), h7 (on request)	Per ISO 286 or customer drawing
Straightness	≤ 0.3 mm per meter	≤ 0.15 mm/m (precision grade)
Surface Roughness	Ra 0.8–1.6 µm	Ra ≤ 0.4 µm (with additional polishing)
Packaging	Oiled, bundled, plastic-wrapped on wooden pallets	VCI paper, export crates

Manufacturing Process

Hot-Rolled Bar Input: Sourced from continuously cast, fully killed steel with ultrasonic inspection.
Pickling & Phosphating: Removes scale and prepares surface for cold drawing.
Cold Drawing: Passed through a die at room temperature to reduce diameter and improve properties.
Straightening: Precision roller or stretch-straightening for optimal geometry.
Final Inspection: Dimensional checks, visual surface review, and batch testing.
Optional: Stress relieving (～550–650°C) to minimize distortion during machining (available on request).

Why Choose Cold Drawn Over Hot-Rolled or Ground Bars?

Feature	Hot-Rolled Bar	Cold Drawn Bar	Precision Ground Bar
Surface Finish	Rough, scaled	Smooth, clean	Mirror-like (Ra < 0.8 µm)
Dimensional Tolerance	±0.5 mm or worse	±0.05–0.1 mm	±0.01 mm (h6/h7)
Strength	Standard	Enhanced (strain hardened)	As-heat-treated
Machining Allowance	High	Low to none	Minimal or none
Cost Efficiency	Low material cost	Balanced performance/cost	Higher cost, high precision
Best For	Structural frames	Mass-produced precision parts	Critical-fit components

Cold drawn bars offer the optimal balance for high-volume mechanical parts requiring reliability without the expense of grinding.

Applications in Mechanical Engineering

Automotive: Transmission shafts, steering columns, valve stems
Industrial Machinery: Pump shafts, guide rods, eccentric cams
Agricultural Equipment: PTO shafts, linkage pins
Hydraulics & Pneumatics: Piston rods, cylinder spindles
Robotics: Joint axes, actuator components
Tooling: Die holders, ejector pins, mold cores

Quality Assurance

Full mill test reports (MTRs) per EN 10204 3.1
ISO 9001:2015 certified production
Batch traceability via heat number
Optional ultrasonic testing (UT) or magnetic particle inspection (MPI) for critical applications
Compliance with RoHS and REACH regulations

Ordering Guidelines

To ensure optimal performance, please provide:

Desired steel grade (e.g., 42CrMo4 / AISI 4140)
Required diameter and length
Tolerance class (e.g., h8)
Surface finish preference
Quantity and delivery terms
Special requirements (e.g., stress relief, cut-to-length, certification level)

Samples and technical support are available for design validation.

Conclusion

The Cold Drawn Alloy Steel Round Bar is a cornerstone material in modern mechanical engineering—delivering superior consistency, reduced machining costs, and reliable performance across thousands of industrial applications. By leveraging the natural strengthening effects of cold working and stringent process control, we provide a ready-to-machine solution that accelerates production cycles and enhances component quality.

Company Details

Bronze Gleitlager

Bronze Sleeve Bushings

and

Graphite Plugged Bushings

from Quality China Factory



Business Type:

Manufacturer,Distributor/Wholesaler,Exporter 


Total Annual:

>1000000


Employee Number:

>100 


Ecer Certification：

Verified Supplier 

Our company is located in Wuxi City, China, we are a stainless steel plate, seamless steel pipe, round steel, steel belt, decorative pipe and other products distribution wholesale private enterprise. Our company operates stainless steel plate, seamless steel pipe, round steel, steel belt, decorative... Our company is located in Wuxi City, China, we are a stainless steel plate, seamless steel pipe, round steel, steel belt, decorative pipe and other products distribution wholesale private enterprise. Our company operates stainless steel plate, seamless steel pipe, round steel, steel belt, decorative...

+ Read More

Reach Us
JIANGSU MITTEL STEEL INDUSTRIAL LIMITED
No.283-1, Youyi Middle Road, Xishan District, Wuxi City, Jiangsu Province
https://www.stainless-strips.com/

Chat online Now

Leave a Message, we will call you back quickly!