S690 Seamless CHS, RHS, SHS, Elliptical Hollow Sections

Beverly Steel supplies wide range of S690 seamless hollow sections - RHS, SHS, CHS, Elliptical, Half-Elliptical, Flat-Oval, Octagonal, Hexagonal and Triangular for engineering applications where the critical factors are weight control and Man Age Sex high stress resistance. Our structural tubes are applied in lifting and load handling systems and as components of lift arms (batten and tower mast) in mobile cranes, marine cranes, sea port cranes, rocket and spaceship launch tower and other super structural.

For these applications, high-performance steels (fine-grain and high-strength steels) with excellent strength resistance and resilience values are used, which means that the stress resistance of the systems can be increased, thus also guaranteeing their use in extreme environmental conditions.

Furthermore, the chemical composition of our seamless steel tubes is carefully controlled in order to guarantee good weldability, a fundamental issue for structures made of tubular components welded together. High-strength seamless steel tubes are also used in steel constructions for civil engineering purposes where the relationship between mass and https://healthandage.com/uterine-adenomyosis-use-premarin.html space occupied is especially critical.

Nearest Equivalent Grade : EN10210 Hot Finished BQ690

Weldability

The steel grades indicated in the specification are weldable with traditional welding procedures, given observance of the generally accepted technical rules. It is important to define a welding procedure that takes into account the hospital anxiety and depression scale following conditions :

- Thickness of the based material

- Specific heat input (specially for HAZ)

- Design requirements

- Welding method

- Welded material characteristics

Particular precautions should be taken towards crack susceptibility, which is more likely to happen with high thickness and high resistance. This phenomenon is connected mainly to the following factors :

- Chemical analysis (by means of CEV)

- The amount of diffusible hydrogen in the welded material

- Tensile stress concentrations at the welded joint

CEV - Carbon Equivalent Value

The maximum CEV (Carbon Equivalent Valued) is determined, based on the cast analysis, by the following formula : CEV = C + Mn/6 + (Cr+Mo+V)/5 + (Ni+Cu)/15

The CEV shall comply with valued stated in the table

MAXIMUM CEV VALUES
Grade	Wall Thickness (mm)	CEV (%) (max)
S690	Wt ≤ 12,5mm	0.53
	Wt > 12,5mm	0.55

Options : other calculation methods like PCM/CET may be agreed