Mechanical Tubing: ASTM A519:ASTM A519 American Society for Testing Material
Tube for Structures:DIN 1629 :Deutsches Institut fǖr Normung
Size: OD: 10.3mm-711.2mm WT: Hot finish: 0.250″-4.00″ Cold drawn: 0.035″-0.875″ Length: Random Length,Fixed Length, SRL,DRL
Heart treatment: Annealed, Normalized,Stress relieved ,Cold
Uses: For manufacture of pipelines,vessels,equipment,pipe fittings and steel structures.
|Steel Grade||Type of deoxidization
(R, killed (including semi-killed)) (RR,fully killed)
|Chemical Composition, % by mass|
|Symbol||Material Number||C||P||S||N¹)||Addition of nitrogen fixing elements
(e.g.not less than 0,020% Al total
|Steel Grade||Upper Yield Stress ReH
for wall thickness, in mm,
|Symbol||Material Number||up to 16||over 16 up to 40||over 40 up to 65||Longitudinal||Transverse|
|St 37.0||1.0254||235||225||216||350²) to 480||25||23|
|St 44.0||1.0256||275¹)||265¹)||255¹)||420²) to 550||21||19|
|St 52.0||1.0421||355||345||335||500²) to 650||21||19|
|¹) For cold finished tube in the NBK condition (annealed above the upper transformation point under shielding gas or in a vacuum), minimum values of yield stress lower than these valued by 20N/mm² are permitted.
²) For cold finished tubes in the NBK condition, minimum values of tensile strength lower than these values by 10N/mm² are permitted.