I. Material standards and naming
Standard replacement
Q355ne round steel is a new standard material that can replace the old standard q355e round steel and enhance performance stability in low temperature environments。
Q: represents the strength of submission
(a) 355: expressing a yield of not less than 355 mpa
N: expressing a fire or a rolling process
E: represents good shock resilience 34 at -40°c。
Chemical composition and mechanics
Chemical composition
Carbon (c) ≤0. 18-0. 20%, manganese (mn) 0. 90-1. 65%, silicon (si) 0. 50%
Phosphorus (p) 0. 025-0. 035%, sulphur (s) 0. 020-0. 035%
It contains trace alloying elements (thinium, titanium, titanium, etc.) to increase strength and resilience。
mechanical performance
: ≥345 mpa (16 mm thick)
• tensile strength 470-630mpa
• length: 17-21 per cent
temperature shock resilience: -40°c impact test qualified
Iii. Production processes and specifications
Production process
Thermal or pyrotechnic process to ensure uniform performance through strict control of temperature (100-1250°c) and rolling parameters
Scope of specification
A diameter: common 6 mm-300 mm, supporting customization
Forms of supply: hot roller steel, cold roller steel, alloy rods, etc
Iv. Applications
Construction and bridges
For key structural components such as high-rise construction frameworks, bridge main beams to enhance carrying capacity and stability。
Mechanical and transport equipment
For heavy mechanical frameworks, railway vehicle spare parts to meet high-intensity and low-temperature requirements。
Special circumstances
The cold weather in the coastal zone and in the north (e. G. -40°c) remains excellent。
Supply and procurement
Prices and starting orders
Commencement: 1 shipment to support retail sales
Main suppliers
Shanghai and jiangsu enterprises provide spot delivery to support national shipments