Q420 carbon steel wire is a high-strength low-alloy (HSLA) steel wire designed for structural and mechanical applications requiring exceptional tensile strength, toughness, and good weldability. With a yield strength of up to 420 MPa, it is widely used in heavy construction, bridge reinforcement, high-load components, pressure vessels, and specialized machinery.
The Q420 carbon steel wire represents the boundary for the economic application of high-strength steel. Under the condition of ensuring weldability, it provides the optimal strength-ductility balance for structures with a strength level below 500 MPa. When the strength of Q390 is insufficient and the cost of Q460 is too high, Q420 is an ideal transitional solution.
At Jiangsu Cunrui Metal Products Co., Ltd., we manufacture and supply high-quality Q420 carbon steel wire with stable mechanical properties, precise dimensions, and customizable specifications to support global engineering and fabrication projects.
Product Specifications:
|
Product |
Q420 Carbon Steel wire |
|
Material |
Q420 |
|
Standard |
ASME, ASTM, EN, BS, GB, DIN, JIS, etc |
|
Size Range |
0.1mm-14mm, or as per requirements |
|
Surface Treatment |
Common, polished, galvanized, black, etc. |
|
Processing Service |
Welding, Punching, Cutting, Bending, Decoiling |
|
Delivery Time |
According to customer needs |
|
Shape |
Round.Rectangle |
|
MOQ |
1 Ton |
|
Package |
Wire coils wrapped in plastic film, moisture-proof paper, and steel-strapped bundles; optional wooden pallet |
Mechanical Properties:
|
Grade |
tensile strength(Mpa) |
Yield Strength(Mpa) |
Elongation(%) |
Hardness(HBV) |
|
Q420 |
520-680 |
≥420 |
≥18 |
Chemical Compositions:
|
Grade |
C(%) |
Si(%) |
Mn(%) |
V(%) |
Nb(%) |
Ti(%) |
Ni(%) |
N(%) |
|
Q420 |
≤0.18 |
≤0.55 |
1.00-1.70 |
0.05-0.15 |
0015-0.060 |
0.003-0.05 |
Material Basic Attributes:
1. Specifications and Standards
Chinese Standard: GB/T 1591-2018 (Low Alloy High-Strength Structural Steel)
Specification Interpretation:
Q: Yield Strength ("Yield" is the initial letter of the pinyin)
420: Minimum Yield Strength ≥ 420 MPa (Thickness ≤ 16mm)
International benchmarking:
United States ASTM: A572 Gr.60 (similar performance)
Europe EN: S420ML (Please note the difference in ingredients)
2. Quality grade
It is divided into three levels: C, D, and E, specifically designed for high-strength steel.
|
Grade |
Sulfur (S) |
Phosphorus (P) |
Impact Temperature |
|
Class C |
≤0.035% |
≤0.035% |
0℃ impact |
|
Class D |
≤0.030% |
≤0.025% |
-20℃ impact |
|
Class E |
≤0.025% |
≤0.020% |
-40℃ impact |
Features & Advantages:
High Yield and Tensile Strength: Suitable for load-bearing and dynamic environments
Good Toughness: Performs well under stress, impact, and fatigue loading
Excellent Weldability: Can be processed by common welding techniques without cracking
Corrosion Resistance (optional treatment): Surface coating available for harsh environments
Versatile Applications: Widely used in construction, civil engineering, heavy machinery, mining support systems, and steel cable manufacturing
Customization Options:
We offer full customization based on your application requirements:
Wire diameter, tolerance, and coil weight
Mechanical properties (tensile, yield, elongation)
Surface treatments: Oil-coated, galvanized, phosphate-coated, etc.
Packaging: Spools, coils, cut-to-length, or according to customer design
OEM services: Private labeling and international standard compliance
Quality Control & Certifications:
Produced under ISO 9001:2015 certified quality management system
In-house testing for chemical composition, tensile strength, dimensional accuracy, and surface integrity
Mill Test Certificate (MTC) provided with each shipment
Support for third-party inspection (SGS, BV, etc.)
Full traceability and quality guarantee for every batch shipped
After-Sales Support:
Timely response to technical inquiries and delivery tracking
Replacement or refund for any confirmed quality issues
Guidance for handling, storage, and product use
Jiangsu Cunrui Metal Products Co., Ltd. is your trusted supplier for Q420 carbon steel wire, providing consistent quality, fast delivery, and customized support for international clients.
📩 Contact us today for samples, pricing, and technical specifications.
