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JIS G3444 Carbon Steel seamless Tubes For General Structural Purpose

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mulus dingin baja terhunus tube

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JIS G3444 Carbon Steel seamless Tubes For General Structural Purpose

MOQ:	1 ton
harga:	dapat dinegosiasikan
kemasan standar:	Dalam bundel atau dalam kotak kayu.
Periode pengiriman:	20-40 hari
metode pembayaran:	L/C, D/A, D/P, T/T, Western Union, MoneyGram
Kapasitas pasokan:	60000 ton/ton per tahun

Informasi Detail

Deskripsi Produk

Informasi Rinci

Tempat asal

Zhejiang/China

Nama merek

TORICH

Sertifikasi

ISO9001 ISO 14001 TS16949

Nomor model

JIS G3444

Nilai:

STK290 STK400 STK490 STK500 STK540

Ketebalan:

10 - 200 mm

Aplikasi:

Tujuan struktural umum

Standar:

ASTM, DIN, GB, API, JIS

Sertifikasi:

CE,BV,ISO9001,API,ISO

Paduan atau tidak:

Non-paduan, Apakah Paduan

Teknik:

Dingin ditarik, digambar dingin/rolling dingin/dingin yang ditarik/dingin ditarik dingin

Sekunder atau tidak:

Non-sekunder

Bentuk bagian:

Bulat

Diameter luar (bulat):

10 - 630mm

Pipa khusus:

Tabung Baja Tanpa Jahit yang Tepat

Permukaan:

Kebutuhan Pelanggan

Membentuk:

Bentuk bulat

Nama Produk:

Pipa Baja Seamless

Jenis:

Pipa Baja Bulat Mulus

Deskripsi Produk

JIS G3444 Carbon Steel seamless Tubes For General Structural Purpose 0

JIS G3444 Carbon Steel Seamless Tubes (STK290 / STK400 / STK490 / STK500 / STK540) for General Structural Purpose

Material Overview

These are carbon steel seamless or welded tubes conforming to Japanese Industrial Standard JIS G3444. They are designed for general structural use: civil engineering, architecture, piles, frameworks, etc. The grades STK290, STK400, STK490, STK500, STK540 denote different strength levels.

Specification

Property	Details
Standard	JIS G3444 (e.g. version 2006 / 2021)
Grades	STK290, STK400, STK490, STK500, STK540
Forms	Seamless, Electric Resistance Welded (ERW), Automatic Arc Welded, Butt Welded
Outer Diameter Range	~21.7 mm to 1016.0 mm
Wall Thickness Range	~2.0 mm to ~22 mm (depending on OD etc.)

Chemical Composition

Grade	C (max)	Si (max)	Mn (max) / range	P (max)	S (max)
STK290	–	–	–	0.050 %	0.050 %
STK400	0.25 %	–	–	0.040 %	0.040 %
STK490	0.18 %	0.55 %	1.65 %	0.035 %	0.035 %
STK500	0.24 %	0.35 %	0.30 ‒ 1.30 %	0.040 %	0.040 %
STK540	0.23 %	0.55 %	1.50 %	0.040 %	0.040 %

Mechanical Properties

Here are the mechanical property minima required by the standard for the different grades. This covers tensile strength, yield or proof stress, weld-zone tensile strength, bending & flattening tests. Elongation also specified.

Grade	Tensile Strength, min (Rm) [N/mm²]	Yield Point / Proof Stress, min [N/mm²]	Weld Tensile Strength, min [N/mm²]	Elongation, min %	Flattening / Bend Tests
STK290	290	—	290	30 % (Seamless & Butt welded) / 30 % (ERW etc.) / smaller reductions for larger OD or other methods	Flattening: distance between flat plates = 2/3 D; Bend: 90° bend, inside radius = 6D
STK400	400	235	400	~23 % for most tube manufacturing; lower for certain large diameters or weld types	Flattening: 2⁄3 D; Bend: 90°, 6D
STK490	490	315	490	~23 % or similar; reduced in certain test piece directions or larger ODs	Flattening: 7⁄8 D; Bend: 90°, 6D
STK500	500	355	500	somewhat lower elongation (~15-18 %) for larger tubes or more highly worked materials; see standard	Flattening: 7⁄8 D; Bend: 90°, 8D
STK540	540	390	540	similar to STK500, depending on OD and method; elongation tends to drop somewhat with the higher strength grades	Flattening: 7⁄8 D; Bend: 90°, 8D

Key Features

Graded Strength Levels: Users can select the grade according to structural needs— from basic strength (STK290) to high strength (STK540).
Versatility in Manufacturing: Available seamless or welded, with finishing options. Allows adaptation to application demands and cost/performance trade-offs.
Good Ductility / Toughness especially in lower grades—ensures resistance to brittle failure, suitable for bending, welding, fabrication.
Rigorous Quality Tests: Flattening, bend tests, weld tensile strength etc. help ensure integrity.
Dimensional & Tolerance Standards ensure interchangeability and predictable behavior.

Applicable Standards

JIS G3444 itself is the primary executing standard.
Related standards for chemical analyses and finished product analysis: JIS G0320 (heat / melt analysis), JIS G0321 (product analysis)
Mechanical test method standards cited or used in conjunction: flattening test, bending test, tensile test etc. (within JIS G3444).

Application Domains

Domain	Specific Uses
Civil Engineering & Construction	Support columns, beams, frameworks, building facades, scaffolding, footings, piles for foundations, retaining structures, structural bracing.
Infrastructure	Piles for bridges, piles for landslide suppression, retaining walls, utility structures.
Architectural Structures	Towers, handrails, perimeter fences, decorative structures where structural load + aesthetic finish needed.
Industrial Buildings / Equipment	Frameworks, supports for equipment, overhead structures, racks, platforms.
Temporary / Modular Structures	Scaffolding systems, temporary shelters, shipping container adaptations.

JIS G3444 Carbon Steel seamless Tubes For General Structural Purpose 1

JIS G3444 Carbon Steel seamless Tubes For General Structural Purpose 2

JIS G3444 Carbon Steel seamless Tubes For General Structural Purpose 4

JIS G3444 Carbon Steel seamless Tubes For General Structural Purpose 6

Q: Are you trading company or manufacturer ?

A: manufacturer,also can do trading.

Q: How long is your delivery time?

A: Generally speaking,it is 10-15 days if the goods are in stock,or it is 30-40 days if the goods are not in stock, it is according to quantity.

Q: Do you provide samples? is it free or extra ?

A: Yes, we could offer the sample for free charge but need pay the cost of freight.

Q: What is your terms of payment ?

A: Payment<=2000USD, 100% in advance. Payment>=2000USD, 30% T/T in advance ,balance before shippment.

If you have another question, pls feel free to contact with me.

Tag:

ditarik tabung dingin ditarik,

pipa baja galvanis mulus,

tabung mulus digulung dingin

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Pipa Baja Otomotif

JIS G3444 Carbon Steel seamless Tubes For General Structural Purpose

MOQ:	1 ton
harga:	dapat dinegosiasikan
kemasan standar:	Dalam bundel atau dalam kotak kayu.
Periode pengiriman:	20-40 hari
metode pembayaran:	L/C, D/A, D/P, T/T, Western Union, MoneyGram
Kapasitas pasokan:	60000 ton/ton per tahun

Informasi Rinci

Deskripsi Produk

Informasi Rinci

Tempat asal

Zhejiang/China

Nama merek

TORICH

Sertifikasi

ISO9001 ISO 14001 TS16949

Nomor model

JIS G3444

Nilai:

STK290 STK400 STK490 STK500 STK540

Ketebalan:

10 - 200 mm

Aplikasi:

Tujuan struktural umum

Standar:

ASTM, DIN, GB, API, JIS

Sertifikasi:

CE,BV,ISO9001,API,ISO

Paduan atau tidak:

Non-paduan, Apakah Paduan

Teknik:

Dingin ditarik, digambar dingin/rolling dingin/dingin yang ditarik/dingin ditarik dingin

Sekunder atau tidak:

Non-sekunder

Bentuk bagian:

Bulat

Diameter luar (bulat):

10 - 630mm

Pipa khusus:

Tabung Baja Tanpa Jahit yang Tepat

Permukaan:

Kebutuhan Pelanggan

Membentuk:

Bentuk bulat

Nama Produk:

Pipa Baja Seamless

Jenis:

Pipa Baja Bulat Mulus

Kuantitas min Order:

1 ton

Harga:

dapat dinegosiasikan

Kemasan rincian:

Dalam bundel atau dalam kotak kayu.

Waktu pengiriman:

20-40 hari

Syarat-syarat pembayaran:

L/C, D/A, D/P, T/T, Western Union, MoneyGram

Menyediakan kemampuan:

60000 ton/ton per tahun

Deskripsi Produk

JIS G3444 Carbon Steel seamless Tubes For General Structural Purpose 0

JIS G3444 Carbon Steel Seamless Tubes (STK290 / STK400 / STK490 / STK500 / STK540) for General Structural Purpose

Material Overview

Specification

Property	Details
Standard	JIS G3444 (e.g. version 2006 / 2021)
Grades	STK290, STK400, STK490, STK500, STK540
Forms	Seamless, Electric Resistance Welded (ERW), Automatic Arc Welded, Butt Welded
Outer Diameter Range	~21.7 mm to 1016.0 mm
Wall Thickness Range	~2.0 mm to ~22 mm (depending on OD etc.)

Chemical Composition

Grade	C (max)	Si (max)	Mn (max) / range	P (max)	S (max)
STK290	–	–	–	0.050 %	0.050 %
STK400	0.25 %	–	–	0.040 %	0.040 %
STK490	0.18 %	0.55 %	1.65 %	0.035 %	0.035 %
STK500	0.24 %	0.35 %	0.30 ‒ 1.30 %	0.040 %	0.040 %
STK540	0.23 %	0.55 %	1.50 %	0.040 %	0.040 %

Mechanical Properties

Grade	Tensile Strength, min (Rm) [N/mm²]	Yield Point / Proof Stress, min [N/mm²]	Weld Tensile Strength, min [N/mm²]	Elongation, min %	Flattening / Bend Tests
STK290	290	—	290	30 % (Seamless & Butt welded) / 30 % (ERW etc.) / smaller reductions for larger OD or other methods	Flattening: distance between flat plates = 2/3 D; Bend: 90° bend, inside radius = 6D
STK400	400	235	400	~23 % for most tube manufacturing; lower for certain large diameters or weld types	Flattening: 2⁄3 D; Bend: 90°, 6D
STK490	490	315	490	~23 % or similar; reduced in certain test piece directions or larger ODs	Flattening: 7⁄8 D; Bend: 90°, 6D
STK500	500	355	500	somewhat lower elongation (~15-18 %) for larger tubes or more highly worked materials; see standard	Flattening: 7⁄8 D; Bend: 90°, 8D
STK540	540	390	540	similar to STK500, depending on OD and method; elongation tends to drop somewhat with the higher strength grades	Flattening: 7⁄8 D; Bend: 90°, 8D

Key Features

Graded Strength Levels: Users can select the grade according to structural needs— from basic strength (STK290) to high strength (STK540).
Versatility in Manufacturing: Available seamless or welded, with finishing options. Allows adaptation to application demands and cost/performance trade-offs.
Good Ductility / Toughness especially in lower grades—ensures resistance to brittle failure, suitable for bending, welding, fabrication.
Rigorous Quality Tests: Flattening, bend tests, weld tensile strength etc. help ensure integrity.
Dimensional & Tolerance Standards ensure interchangeability and predictable behavior.

Applicable Standards

JIS G3444 itself is the primary executing standard.
Related standards for chemical analyses and finished product analysis: JIS G0320 (heat / melt analysis), JIS G0321 (product analysis)
Mechanical test method standards cited or used in conjunction: flattening test, bending test, tensile test etc. (within JIS G3444).

Application Domains

Domain	Specific Uses
Civil Engineering & Construction	Support columns, beams, frameworks, building facades, scaffolding, footings, piles for foundations, retaining structures, structural bracing.
Infrastructure	Piles for bridges, piles for landslide suppression, retaining walls, utility structures.
Architectural Structures	Towers, handrails, perimeter fences, decorative structures where structural load + aesthetic finish needed.
Industrial Buildings / Equipment	Frameworks, supports for equipment, overhead structures, racks, platforms.
Temporary / Modular Structures	Scaffolding systems, temporary shelters, shipping container adaptations.

JIS G3444 Carbon Steel seamless Tubes For General Structural Purpose 1

JIS G3444 Carbon Steel seamless Tubes For General Structural Purpose 2

JIS G3444 Carbon Steel seamless Tubes For General Structural Purpose 4

JIS G3444 Carbon Steel seamless Tubes For General Structural Purpose 6

Q: Are you trading company or manufacturer ?

A: manufacturer,also can do trading.

Q: How long is your delivery time?

A: Generally speaking,it is 10-15 days if the goods are in stock,or it is 30-40 days if the goods are not in stock, it is according to quantity.

Q: Do you provide samples? is it free or extra ?

A: Yes, we could offer the sample for free charge but need pay the cost of freight.

Q: What is your terms of payment ?

A: Payment<=2000USD, 100% in advance. Payment>=2000USD, 30% T/T in advance ,balance before shippment.

If you have another question, pls feel free to contact with me.

Tag: