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Help CenterJIS G3444 Seamless STK400 STK500 Low Carbon Steel Tube
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JIS G3444
STK290/STK400/STK500/STK490/STK540 used for civil engineering, architecture, steel towers, scaffoldings, struts, piles for suppression of landslide and other structures.
STK290/STK400/STK500/STK490/STK540 Chemical Composition
| Symbol of class | C | Si | Mn | P | S |
| STK290 | - | - | - | 0.050 max | 0.050 max |
| STK400 | 0.25 max | - | - | 0.040 max | 0.040 max |
| STK490 | 0.18 max | 0.55 max | 1.50 max | 0.040 max | 0.040 max |
| STK500 | 0.24 max | 0.35 max | 0.30 to 1.30 | 0.040 max | 0.040 max |
| STK540 | 0.23 max | 0.55 max | 1.50 max | 0.040 max | 0.040 max |
STK290/STK400/STK500/STK490/STK540 Mechanical Properties
| Mechanical properties | Tensile strength N/mm2 | Yield point or proof stress N/mm2 | Elongation % | Bendability | Flattening | Tensile strength in welded zone N/mm2 | ||
| No.11 and No.12 test pieces | No.5 test piece | Bend angle | Inside radius (D: outside diameter of tube) | Distance between flattening plates (H) (D: outside diameter of tube) | ||||
| Longitudinal direction | Transverse direction | |||||||
| Method of manufacture | Seamless, butt-welding, electric resistance welding and arc welding process | Seamless, butt-welding, electric resistance welding process | Seamless, butt-welding, electric resistance welding process | Arc welding process | ||||
| Outside diameter | Full range | Full range | Over 40 mm | 50 mm or under | Full range | Over 350 mm | ||
| STK290 | 290 min | - | 30 min | 25 min | 90° 6D | 2/3D | 290 min | |
| STK400 | 400 min | 235 min | 23 min | 18 min | 90° 6D | 2/3D | 400 min | |
| STK490 | 490 min | 315 min | 23 min | 18 min | 90° 6D | 7/8D | 490 min | |
| STK500 | 500 min | 355 min | 15 min | 10 min | 90° 8D | 7/8D | 500 min | |
| STK540 | 540 min | 390 min | 20 min | 16 min | 90° 6D | 7/8D | 540 min | |
We can supply STK290/STK400/STK490/STK500/STK540 steel tube in different size, if you have demands about this product,
please tell us. We can supply seamless pipe, weld pipe, with plain end or bevel end, hydro test and UT can be done if you need.
With the belief "Once believe, trust forever", Katalor Enterprise always see honesty as our company life, so we have long terms
cooperation with many clients, sincerely hope work together with you.
Company introduction: Liaocheng City Kuncheng Steel Pipe Co., Ltd. is an industrial and trading company.
Products introduction: We mainly produce and deal with carbon steel pipes and alloy steel pipes. In addition, steel rods, steel sheets, steel building materials and machinery parts are also our general trading products. We are not only a manufacturer but also a stock keeper. We normally keep more than 5,000 tons of pipes in various sizes and standards. Our stock pipe size ranges from 20mm to 406mm in outside diameter and from 2mm to 70mm in wall thickness.
Export to: With competitive price and excellent quality our products have been exported to America, Japan, Greece, Russia,Spain, Chile and many other countries. I hope we can establish business relationship with you and expand your business scale. we are professional and experienced supplier of steel products in china. We will provide you with high quality and low price, and we also offer good service. If our products can meet your needs, please contact us freely. We are looking forward to cooperating with you, and welcome your inquiry!
Liaocheng Kuncheng steel pipe CO., Ltd.
Tel&Fax:0635-2930669
Wechat&Whatsapp :+8613184174934
Skype:live:mrhrc
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