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Q460C STRUCTURAL STEEL

Chemical element composition – Chinese grade Q460C low alloy high strength structural steel 🔍 Q460C Grade Lookup →

Product Overview

Q460C is a Chinese grade low-alloy high-strength structural steel conforming to GB/T 1591-2018 standard. Grade C provides guaranteed impact toughness at 0°C. With minimum yield strength of 460MPa, it provides higher strength than Q420 series and is widely used in bridges, buildings, pressure vessels, and engineering structures requiring enhanced load-bearing capacity in moderate low-temperature conditions.

Equivalent grades: Q460C ↔ Q420C (lower strength domestic), EN 10025 S500J0 (Europe), ASTM A572 Grade 65 (USA).

International Grade Comparison

Europe (EN 10025-2)

S500J0

Impact: 0°C (27J)

Yield: 500MPa

C: ≤0.22%

Si: ≤0.60%

Mn: ≤1.80%

P: ≤0.030%

S: ≤0.030%

Nb: ≤0.05%

V: ≤0.12%

Ti: ≤0.05%

USA (ASTM A572)

Gr.65

Impact: Not specified

Yield: 450MPa

C: ≤0.26%

Si: ≤0.40%

Mn: ≤1.35%

P: ≤0.025%

S: ≤0.025%

Nb: ≤0.05%

V: ≤0.15%

Ti: ≤0.05%

China (GB/T 1591)

Q420C

Impact: 0°C (34J)

Yield: 420MPa

C: ≤0.20%

Si: ≤0.55%

Mn: ≤1.70%

P: ≤0.030%

S: ≤0.030%

Nb: ≤0.05%

V: ≤0.13%

Ti: ≤0.05%

Note: Q460C offers higher strength than Q420C and is comparable to S500J0 and ASTM A572 Grade 65; always verify specific requirements before substitution.

China Grade Comparison: Q390C vs Q420C vs Q460C

Q390C

Grade C

Impact: 0°C

KV2 (L): 34J

Yield: 390MPa

P: ≤0.030%

S: ≤0.030%

Q420C

Grade C

Impact: 0°C

KV2 (L): 34J

Yield: 420MPa

P: ≤0.030%

S: ≤0.030%

Q460C

Grade C

Impact: 0°C

KV2 (L): 34J

Yield: 460MPa

P: ≤0.030%

S: ≤0.030%

Note: Q390C, Q420C, and Q460C all share Grade C impact requirements (0°C, 34J). The key difference is increasing yield strength from 390MPa to 460MPa with similar impurity limits.

Key Advantages

Higher Strength

Minimum yield strength of 460MPa (≤16mm) and tensile strength 540-720MPa, ideal for high-stress structural applications.

Good Weldability

Controlled carbon content and micro-alloying elements ensure good weldability for most fabrication processes.

0°C Impact Toughness

Grade C provides guaranteed impact energy of 34J at 0°C (longitudinal), suitable for moderate low-temperature applications.

Applications

Building Structures

High-rise buildings, industrial plants, stadiums, steel frameworks requiring higher strength.

Heavy Machinery

Construction machinery, crane booms, mining equipment, heavy vehicles requiring enhanced strength.

Q460C Chemical Composition (GB/T 1591-2018)

Grade Quality C Si Mn P S
Q460 C ≤0.20 ≤0.60 ≤1.8 ≤0.030 ≤0.030
Nb V Ti Cr Ni Cu Mo N Als (min)
≤0.11 ≤0.13 ≤0.05 ≤0.3 ≤1.0 ≤0.5 ≤0.3 ≤0.015 ≥0.015

Notes:

a. For bars, P/S upper limit +0.005%.

b. V+Nb+Ti ≤0.22%.

c. Ti up to 0.20% maximum.

d. Alt (total aluminum) can substitute Als with minimum 0.020%. When Nb/V/Ti added at specified levels, Als lower limit not required.

e. Steel must contain at least one grain-refining element (Al, Nb, V, Ti) with content not less than specified minimum.

Q460C Tensile Properties (GB/T 1591-2018)

Upper yield strength ReH/MPa ≥
Grade ≤16mm 16-40mm 40-63mm 63-80mm 80-100mm 100-150mm
Q460C 460 440 420 400 390 380
Property Thickness Range Value
Tensile Strength Rm ≤100mm 540-720 MPa
100-150mm 530-700 MPa
Elongation A % ≤16mm 17%
16-40mm 17%
40-63mm 17%
63-100mm 16%
Impact Energy Longitudinal Transverse
KV2 (J) at 0°C 34 27

Notes: When yield not obvious, use Rp0.2.

Customizable Options

We offer comprehensive customization services to meet your specific project requirements:

Custom Dimensions
Non-standard sizes, laser cutting		 Surface Treatments
Shot blasting, priming		 Edge Preparation
Beveling, machining
Custom Heat Treatment
Normalizing, stress relieving		 Special Testing
Third-party inspection		 Custom Marking
Special labeling

Size & Specification

Product Form Thickness (mm) Width (mm) Length (mm)
Plate 3 - 150 1000 - 4000 3000 - 18000
Sheet / Coil 1.5 - 20 900 - 2000 Coil or cut to length

Other sizes can be produced upon request. Custom cutting available.

Quality & Manufacturing Assurance

Modern Production

Advanced continuous casting and controlled rolling technology

In-process Inspection

Rigorous testing at each stage, including spectral analysis and impact testing at 0°C

Full Documentation

Mill Test Certificate (MTC) compliant with EN 10204 3.1/3.2

Packaging & Logistics

  • Packaging: Steel plates bundled with steel straps on wooden skids. Coils wrapped with waterproof paper and steel covers.
  • Marking: Each bundle/coil marked with grade, size, heat number, weight.
  • Logistics: FOB, CIF, CFR from main Chinese ports. Lead time 25-35 days after order.

Request a Quote

Emails go directly to customize@cehesteel.com — reply within 2h.

Frequently Asked Questions

What is Q460C?

Q460C is a hot-rolled low-alloy structural steel per GB/T 1591-2018 with 460MPa min yield and 34J impact at 0°C.

What are the equivalents of Q460C?

Q460C is comparable to Q420C (domestic), EN 10025 S500J0 (Europe), and ASTM A572 Grade 65 (USA).

Weldability?

Good weldability with appropriate procedures due to controlled chemistry and low carbon content.

Available thickness?

3mm to 150mm plates, 1.5-20mm coils/sheets with custom cutting available.

Mill certificates?

Yes, EN 10204 3.1 MTC with full data including 0°C impact test results.

MOQ?

Standard 5 tons. Sample orders possible.