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| Brand Name: | TORICH |
| Model Number: | DIN 1629 |
| MOQ: | 5 |
| Price: | negotiable |
| Payment Terms: | L/C, D/A, D/P, T/T, Western Union, MoneyGram |
| Supply Ability: | 50000Tons/Year |
Low Carbon Seamless Steel Tube DIN 1629 St37.0 Non-alloyed Steel Pipe
Standard: DIN 1629 Seamless circular unalloyed steel tubes subject to special requirements
Applications: used in construction of chemical plant,vessels,pipework and for general mechanical engineering purposes.
Production Method: Seamless Cold Drawn/Rolling or Hot Rolling
Size range: O.D.:20-660mm W.T.:1-60mm L:max12000mm
Steel Grade and Chemical Compositions:
| Steel grade | Type of deoxidization (R, killed (including semi-killed)) (RR, fully killed) | Chemical composition, % by mass | Addition of nitrogen fixing elements (e.g. not less than 0.020% A) | ||||
| Symbol | Material number | C | P | S | N 1) | ||
| MAX | |||||||
| St 37.0 | 1.0254 | R | 0.17 | 0.040 | 0.040 | 0.009 2) | - |
| St 44.0 | 1.0258 | R | 0.21 | 0.040 | 0.040 | 0.009 2) | - |
| St 52.0 3) | 1.0421 | R | 0.22 | 0.040 | 0.035 | - | Yes |
| 1) A content in excess of the maximum value stated is permitted if a phosphorus conten less than the maximum specified by 0.005% P per 0.001% N is observed. However, the nitrogen content shall not exceed a value of 0.012% in the cast analysis and 0.014% in the product analysis. 2) The specified maximum values do not apply if the steels are supplied with the RR(instead of R) type of deoxidization. 3) The content shall not exceed 0.55% Si and 1.60% Mn in the cast analysis or 0.60% Si and 1.70% Mn in the product analysis. | |||||||
Mechanical properties of tubes in the as delivewed condition at room temperature
(For wall thickness exceeding 65mm, the values shall be agreed at the time of ordering.)
| Steel grade | Upper yield stress ReH for wall thickness, in mm | Tensile strength Rm N/mm2 | Elongation after fracture Aσ | ||||
| Symbol | Material number | up to 16 | over 16 up to 40 | over 40 up to 65 | longitudinal | transverse | |
| N/mm2 min | % min | ||||||
| St 37.0 | 1.0254 | 235 | 225 | 215 | 350 2) to 480 | 25 | 23 |
| St 44.0 | 1.0256 | 275 1) | 265 1) | 255 1) | 420 2) to 550 | 21 | 19 |
| St 52.0 | 1.0421 | 355 | 345 | 335 | 500 2) to 650 | 21 | 19 |
| 1) For cold finished tubes 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 values by 20N/mm2 are permitted. 2) For cold finished tubes in the NBK cindition, minimum values of tensile strength lower than these values by 10N/mm2 are permitted. | |||||||
This tube is used for high pressure boilers. The seamless high pressure boiler tube is produced with the method of Hot Rolling(Extrusion), Cold Drawn or Cold Rolled, according to the Chinese standard GB 5310-1995.
GB5310-1995, one kind of seamless steel tubes, mainly used to manufacture high pressure steam boiler and above pipelines with high-quality carbon steel, alloy steel and heat-resistant seamless stainless steel tubes.
Feature of seamless high pressure boiler tube: Persistent high strength, high oxidation resistance, good organizational stability
Application of the seamless boiler tube: For high pressure boilers.
Produce method for high pressure boiler tube: Hot rolling(extrusion), cold drawn, cold rolled.
The seamless carbon high pressure boiler tubes material:
10#/20#/Q345/20G/15MnG/20MnG/15MoG/20MoG/16Mn/15CrMo/15CrMoG/12Cr1MoV/12Cr1MoVG/Cr5Mo/10CrMo910 and so on.
The boiler tubes often work in high temperature and high pressure, pipe in high temperature smoke and steam will meet oxidation and corrosion, thus it requires a durable steel Persistent high strength, high oxidation resistance, good organizational stability.
Seamless high-pressure boiler pipe: for the manufacture of a variety of high pressure boiler superheated steam pipes, boiling water pipe, water wall tubes and superheated steam locomotive boiler tubes, opium pipe, small pipe and brick arch tubes. (Dial) seamless steel pipe with high quality carbon structural steel hot or cold. 20# steel is mainly used, in addition to chemical composition and mechanical properties will do hydrostatic testing, curling, flaring, flattening and other tests. State of delivery hot rolled, cold-rolled (dial) to heat treatment delivery.
