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GOST 8645-68 (rectangular, seamless cold-deformed pipes). Materials:Steel 35,Steel45,Steel10,Steel 20,etc Sizes of square pipes have to confirm the values indicated in the table below: Size A, mm Size B, mm Wall thickness s, mm Section square, cm2 Weight of1 mpipe, kg, Inertia moment, cm4= Resistance moment, cm3= Ix Iy Wx Wy 90 60 5 13.57 10.65 75.04 142.8 25.01 31.75 120 80 8 28.34 22.25 268.4 514.5 67.11 85.76 Steel density 7/85 g/cm3 Mechanical composition Steel grade

ASTM A500 Gr C Carbon MS Steel 1020 Small Diameter Seamless Square Tube ASTM A500 (Also known as A-500) carbon steel tubing is a standard specification for cold-formed welded and seamless carbon steel structural tubing in round, square and rectangular shapes. ASTM A500 is the most common specification in North America for Hollow Structural Sections (HSS). Mechanical Properties: Tensile Strength (min): Yield Strength (min): Elongation: Gr A 45,000 psi 39,000 psi 25% Gr B 58

Rectangle Seamless or Welded Steel Tubes ASTM A500 Hollow Section Tube for Structural Application​ Standard: ASTM A500 Steel Rectangle Tubing Cold-Formed Welded and Seamless Carbon Structural Tubes Applications: for construction of bridges, and buildings, and for general strcutrual purposes Size range: O.D. :20 to 500 mm W.T.:1-30mm L:max12000mm Product Name ASTM A500 Hollow Section Steel Tube for Structural Application Material Grade A, B, C, D Standard ASTM A500 Application

Inner oval or hexagonl shapped steel tubes for auto rubber bushing as JIS G3445 STKM12B,STKM11A Seamless Carbon and Alloy Steel Mechanical Tubing Applications: For auto rubber bushing Size range: O.D.:6-76mm W.T.:1-15mm L:max12000mm Steel Grade JIS G3445 STKM11A,12C,13C or others,Chemical compisition: Mechanical properties: JIS3445 C Si Mn P S Nb or V Tention Test Flateniug Bendability Symbol T.S. N/mm^2 Y.P. N/mm^2 Elongation No 4,11,12 Test pe No 4,5 Test pe Distance

Alloy oval special steel tubing by cold Drawn Seamless Steel tubing 4130 4140 40Cr 35Cr Seamless Carbon and Alloy Steel Mechanical Tubing Applications: for mechinery, mechanical engineer Size range: O.D.:6-168mm W.T.:1-15mm L:max12000mm Steel Grade As ASTM A519/A513 or others,Chemical compisition: Steel C Mn P S Si Cr Mo Grade max 　 max max max min 　 1008 0.10 0.30-0.50 0.040 0.050 　 　 　 1010 0.08-0.13 0.30-0.60 0.040 0.050 　 　 　 1018 0.15-0.20 0.60-0.90 0.040 0.050 　 　 　

Cold Formed Seamless Steel Tubes , Square / Rectangle Steel Tubes,ASTM A500 Standard: ASTM A500 Steel Rectangle Tubing Cold-Formed Welded and Seamless Carbon Structural Tubes in Rounds and Shapes Applications: for construction of bridges, and buildings, and for general strcutrual purposes Size range: O.D. :20 to 500 mm W.T.:1-30mm L:max12000mm Product Name ASTM A500 Cold-Formed Welded and Seamless Carbon Structural Tubes Material Grade A, B, C, D Standard ASTM A500 Applicatio

EN10210-1 S275NH S355NH hot rolled seamless heavy wall hollow section steel tube , hollow bars DIN EN 10210-1 Hot finished Heavy Wall Steel Tubing of non-alloy and fine grain steels DIN EN 10210-1 Hot finished structural hollow sections of non-alloy and fine grain steels Part 1: Technical delivery conditions Part 2: Tolerances, dimensions and sectional properties Cold forming: Process is done at ambient temperature Structrual hollow section manufacturing process: Structural

BS EN10219-1 Structural Hollow Section Steel Tube EN 10219-1 specified for Cold formed welded structural hollow sections of non-alloy and fine grain steels Garde:S235JRH,S275J0H,S275J2H,S355J0H,S355J2H,S355K2H Type:Electric resistance welded(ERW) Steel grade % by mass, maximum Steel name Steel number C Si Mn P S N b S235JRH 1.0039 0,17 — 1,40 0,040 0,040 0.009 S275J0H 1.0149 0,20 — 1,50 0,035 0,035 0,009 S275J2H 1.0138 0,20 — 1,50 0,030 0,030 — S355J0H 1.0547 0,22 0,55 1,60 0

JIS G3445 STKM11A STKM12C STKM13C outer round inner oval shapped steel tubes for auto rubber bushing Seamless Carbon and Alloy Steel Mechanical Tubing Applications: For auto rubber bushing Size range: O.D.:6-76mm W.T.:1-15mm L:max12000mm Steel Grade JIS G3445 STKM11A,12C,13C or others,Chemical compisition: Mechanical properties: JIS3445 C Si Mn P S Nb or V Tention Test Flateniug Bendability Symbol T.S. N/mm^2 Y.P. N/mm^2 Elongation No 4,11,12 Test pe No 4,5 Test pe Distance