Q355ne round steel: -40°c extremely cold, construction of a safety backbone in the cold zone

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