Q355NE STRUCTURAL STEEL
Product Overview
Q355NE is a Chinese grade low-alloy high-strength structural steel conforming to GB/T 1591-2018 standard. It features a normalized or normalized plus tempered delivery condition, offering improved toughness and consistent properties. Grade E provides guaranteed impact toughness at -40°C. With minimum yield strength of 355MPa, it is widely used in building structures and heavy machinery requiring enhanced reliability in extremely low-temperature conditions.
International Grade Comparison
Europe (EN 10025-3)
S355NE
Impact: -40°C (31J)
Yield: 355MPa
C: ≤0.18%
Si: ≤0.50%
Mn: 0.90-1.65%
P: ≤0.025%
S: ≤0.020%
Nb: ≤0.05%
V: ≤0.12%
Ti: ≤0.05%
Europe (EN 10025-3)
S355NL
Impact: -50°C (27J)
Yield: 355MPa
C: ≤0.18%
Si: ≤0.50%
Mn: 0.90-1.65%
P: ≤0.025%
S: ≤0.020%
Nb: ≤0.05%
V: ≤0.12%
Ti: ≤0.05%
USA (ASTM A572)
Gr.50
Impact: Not specified
Yield: 345MPa
C: ≤0.23%
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)
Q345E
Impact: -40°C (27J)
Yield: 345MPa
C: ≤0.18%
Si: ≤0.50%
Mn: 1.00-1.60%
P: ≤0.025%
S: ≤0.020%
Nb: ≤0.07%
V: ≤0.15%
Ti: ≤0.20%
Grade Comparison: Q355ND vs Q355NE vs Q355NF
Q355ND
Impact: -20°C
KV2 (L): 40J
C: ≤0.20%
P: ≤0.030%
S: ≤0.025%
Q355NE
Impact: -40°C
KV2 (L): 31J
C: ≤0.18%
P: ≤0.025%
S: ≤0.020%
Q355NF
Impact: -60°C
KV2 (L): 27J
C: ≤0.16%
P: ≤0.020%
S: ≤0.010%
Key Advantages
Normalized Condition
Delivered in normalized or normalized plus tempered state for improved grain refinement and consistent mechanical properties.
Low Carbon
Low carbon content (≤0.18%) and tight P/S control ensure excellent weldability and toughness.
-40°C Impact Toughness
Grade E provides guaranteed impact energy of 31J at -40°C (longitudinal), suitable for extremely low-temperature applications.
Applications
Building Structures
High-rise buildings, industrial plants, stadiums, steel frameworks requiring normalized steel for arctic service.
Heavy Machinery
Construction machinery, crane booms, mining equipment, heavy vehicles requiring normalized steel for extreme cold environments.
Q355NE Chemical Composition (GB/T 1591-2018)
| Grade | Quality | C | Si | Mn | P | S |
| Q355N | E | ≤0.18 | ≤0.50 | 0.90-1.65 | ≤0.025 | ≤0.020 |
| Nb | V | Ti | Cr | Ni | Cu | Mo | N | Als (min) |
| 0.005-0.05 | 0.01-0.12 | 0.006-0.05 | ≤0.3 | ≤0.5 | ≤0.4 | ≤0.1 | ≤0.015 | ≥0.015 |
Notes:
a. For bars, P/S upper limit +0.005%.
b. V+Nb+Ti ≤0.22%, Mo+Cr ≤0.30%.
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.
Q355NE Tensile Properties (GB/T 1591-2018)
| Upper yield strength ReH/MPa ≥ | |||||||||
| Grade | ≤16mm | 16-40mm | 40-63mm | 63-80mm | 80-100mm | 100-150mm | 150-200mm | 200-250mm | |
| Q355NE | 355 | 345 | 335 | 325 | 315 | 295 | 285 | 275 | |
| Property | Thickness Range | Value |
| Tensile Strength Rm | ≤100mm | 470-630 MPa |
| 100-200mm | 450-600 MPa | |
| 200-250mm | 450-600 MPa | |
| Elongation A % | ≤16mm | 22% |
| 16-40mm | 22% | |
| 40-63mm | 22% | |
| 63-80mm | 21% | |
| 80-200mm | 21% | |
| 200-250mm | 21% |
| Impact Temperature | 20°C | 0°C | -20°C | -40°C | |
| KV2 (J) ≥ | Longitudinal | 63 | 55 | 47 | 31 |
| Transverse | 40 | 34 | 27 | 20 | |
Notes: Normalized condition includes normalized and tempered condition. 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 - 250 | 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 normalized heat treatment for optimal grain refinement
In-process Inspection
Rigorous testing at each stage, including spectral analysis and impact testing at -40°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
Q355NE is a normalized low-alloy structural steel per GB/T 1591-2018 with 355MPa min yield and 31J impact at -40°C.
Q355NE is comparable to Q345E (domestic), EN 10025 S355NE, S355NL (Europe), and ASTM A572 Grade 50 (USA).
Excellent weldability due to low carbon content and fine-grain normalized structure.
3mm to 250mm plates, 1.5-20mm coils/sheets with custom cutting available.
Yes, EN 10204 3.1 MTC with full data including -40°C impact test results.
Standard 5 tons. Sample orders possible.
Q355NE is widely used in building structures and heavy machinery requiring normalized steel for extremely low-temperature service.