S355JRtuba quadrata tuba non alloy structural steel square quadrata est quae conformit normas Europianas，Estne fortitudo alta、Good difficulty and weldability，Widely used in architecture、Machinery manufacturing、Bridge construction and other fields。Sequentes circaS355JRDetailed introduction of square tube：
Materiales
yield strength：S355JRMinimum fructum est355MPa。
tensile strength：Intervallis fortitudinis tensilis est470-630MPa。
impact toughness：at room temperature（20℃）Has good impact difficulty。
weldability：Estne bonum benedictionem，Suitable for various welding processes。
corrosion resistance：Corrosionem resistentiam per faciem galvanizationis aut picturam efficientem potest。
Proces productionis
S355JRProduktio tubarum quadratarum prima sequentes gradus includet：
raw material preparation：Adopting high-qualityS355JRStella plate or stripta。
forming：Vendi plateam acidam in quadratum aut rectangularum intersection per molam。
benedictionis：Using high-frequency welding or submerged arc welding，Configurare fortitudinem et signum bene。
align-mode：Eliminate welding stress，Verite simplicitatem et precitatem dimensionalem。
Cutting and Inspection：Cut a size according to customer requirements，And conduct a visual inspection、Mechanical performance testing and non-destructive testing。
Dimensiones et specificationes
Depravatio parietem densitatis：Quando murus densitudo non est maior quam10mmtime，The allowable deviation is the positive or negative of the nominal wall thickness10%；Murum thickness maior quam10mmtime，Deviatio permissibile positiva aut negativa est8%。
Longitudo emissionis：Usually it is4000mm-12000mm，use6000mmet12000mmin multitudine。
Curvatura：Curvatura per metrum non superabit2mm，Curvatura tota non excedet longitudinem totam0.2%。
area aplicationis
structuram aedificationis：Used for beams and columns、Supporting structures, etc，Potent amplius spatios magnos。
Machinery manufacturing：Used for manufacturing frames、Componentes claves, quales frames suportant。
pontes aedificationem：Due his fatigue resistance and weldability，Suitable for bridge piers、Bridge deck support system。
Furniture manufacturing：Used for office furniture、exterior vacuum mobiles。
automobilis：In the field of new energy vehicles and light weight design，Used for body structural components。
Selection precautions
precision dimensionala：Select appropriate cross-sectional dimensions and wall thickness based on specific application requirements。
Yüzey tedavisi：Choose the appropriate surface treatment process based on the usage environment。
property mechanical：Evaluate the mechanical properties of pipes based on design loads and working environments。
weldability：Attention to the selection of welding parameters and the control of welding processes。
Costa efficientia：Taking into account material costs comprehensively、Processor et transportatio costas。
S355JRCubiculum quadratum propter optimum exercitum et amplius exercitus，Has become an indispensable material in modern industry and architecture。
