Name: JIS G3444 Carbon Steel seamless Tubes For General Structural Purpose
Brand: TORICH INTERNATIONAL LIMITED
SKU: JIS G3444
Price: 3,450.00 USD
Availability: InStock

Cuota De Producción:	1 tonelada
Precio:	Negociable
Embalaje Estándar:	En paquetes o en cajas de madera.
Período De Entrega:	20-40 días
Método De Pago:	L/C, D/A, D/P, T/T, Western Union, Moneygram
Capacidad De Suministro:	60000 toneladas/toneladas por año

Información de detalles

Descripción del producto

Información detallada

Lugar de origen

Zhejiang/China

Nombre de la marca

TORICH

Certificación

ISO9001 ISO 14001 TS16949

Número de modelo

JIS G3444

Calificación:

STK290 STK400 STK490 STK500 STK540

Espesor:

10 - 200 milímetros

Solicitud:

Propósito estructural general

Estándar:

Las condiciones de los requisitos de seguridad de los productos incluidos en el anexo I se aplicarán

Certificación:

CE,BV,ISO9001,API,ISO

Aleación o no:

No es aleación, es aleación.

Técnica:

Dibujado en frío, dibujado en frío/rodante frío/en frío Honed/en frío

Secundario o no:

No secundario

Forma de sección:

Redondo

Diámetro exterior (redondo):

10 - 630 mm

Tubería especial:

Tubo de acero sin costura de precisión

Superficie:

Requisitos de los clientes

Forma:

Forma redonda

Nombre del producto:

tubo de acero sin costura

Tipo:

Tubería de acero redonda inconsútil

Descripción del producto

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.

Las etiquetas:

Tubos soldados con autógena retirados a frío,

Tubería de acero galvanizada inconsútil,

tubo inconsútil en frío

Productos recomendados

Tratamiento superficial engrasado tubo de acero retirado a frío inconsútil EN10216 2 para la caldera

Contacta ahora

Tubo de acero retirado a frío inconsútil rodado de alta resistencia diámetro externo de 6 - 350 milímetros

Contacta ahora

Tubos soldados con autógena retirados a frío mecánicos, desgaste - la costura resistente soldó con autógena el tubo

Contacta ahora

Tubería de acero redonda del carbono de Erw de la alta precisión, tubo soldado con autógena Erw hidráulico

Contacta ahora

Tratamiento superficial soldado con autógena del tubo del aceite anti de acero retirado a frío inconsútil del moho

Contacta ahora

Tubo de acero retirado a frío inconsútil ASTM de alta presión A192 de la caldera del cambiador de calor

Contacta ahora

Tubo inconsútil del cambiador de calor ASTM A179, tubo retirado a frío del acero con poco carbono

Contacta ahora

Precisión soldada con autógena inconsútil retirada a frío del tubo del estruendo 2393 alta para la industria automotriz

Contacta ahora

Tubo de acero retirado a frío inconsútil del cilindro redondo del aceite con el estándar EN10305 1

Contacta ahora

Tubo de acero retirado a frío inconsútil del acero de carbono, tubo redondo del acero del hueco de ERW

Contacta ahora

Tubo de acero retirado a frío inconsútil de ASTM A519, tubería de acero inconsútil del carbono de la precisión

Contacta ahora

DETALLES DE LOS PRODUCTOS

Productos

Tubo inconsútil del acero de la precisión

tubo de acero retirado a frío inconsútil

Tubo del acero del cilindro hidráulico

Piezas que trabajan a máquina del CNC

Piezas de aluminio del CNC

Piezas de cobre amarillo del CNC

Piezas de torneado del CNC

Tubo del acero del cambiador de calor

tubo de acero al carbono

tubo del acero de aleación

Tubo de acero soldado con autógena

tubo del acero estructural

Tubería de acero automotriz

JIS G3444 Carbon Steel seamless Tubes For General Structural Purpose

Cuota De Producción:	1 tonelada
Precio:	Negociable
Embalaje Estándar:	En paquetes o en cajas de madera.
Período De Entrega:	20-40 días
Método De Pago:	L/C, D/A, D/P, T/T, Western Union, Moneygram
Capacidad De Suministro:	60000 toneladas/toneladas por año

Información detallada

Descripción del producto

Información detallada

Lugar de origen

Zhejiang/China

Nombre de la marca

TORICH

Certificación

ISO9001 ISO 14001 TS16949

Número de modelo

JIS G3444

Calificación:

STK290 STK400 STK490 STK500 STK540

Espesor:

10 - 200 milímetros

Solicitud:

Propósito estructural general

Estándar:

Las condiciones de los requisitos de seguridad de los productos incluidos en el anexo I se aplicarán

Certificación:

CE,BV,ISO9001,API,ISO

Aleación o no:

No es aleación, es aleación.

Técnica:

Dibujado en frío, dibujado en frío/rodante frío/en frío Honed/en frío

Secundario o no:

No secundario

Forma de sección:

Redondo

Diámetro exterior (redondo):

10 - 630 mm

Tubería especial:

Tubo de acero sin costura de precisión

Superficie:

Requisitos de los clientes

Forma:

Forma redonda

Nombre del producto:

tubo de acero sin costura

Tipo:

Tubería de acero redonda inconsútil

Cantidad de orden mínima:

1 tonelada

Precio:

Negociable

Detalles de empaquetado:

En paquetes o en cajas de madera.

Tiempo de entrega:

20-40 días

Condiciones de pago:

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

Capacidad de la fuente:

60000 toneladas/toneladas por año

Descripción del producto

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.

Las etiquetas: