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

MOQ:	1 tonnellata
prezzo:	Negoziabile
Imballaggio standard:	In fasci o in scatole di legno.
Periodo di consegna:	20-40 giorni
metodo di pagamento:	L/C, D/A, D/P, T/T, Western Union, MoneyGram
Capacità di approvvigionamento:	60000 tonnellate/tonnellate all'anno

Informazioni di dettagli

Descrizione del prodotto

Informazioni dettagliate

Luogo di origine

Zhejiang/Cina

Marca

TORICH

Certificazione

ISO9001 ISO 14001 TS16949

Numero di modello

JIS G3444

Grado:

STK290 STK400 STK490 STK500 STK540

Spessore:

10 - 200 millimetri

Applicazione:

Scopo strutturale generale

Standard:

ASTM

Certificazione:

CE,BV,ISO9001,API,ISO

Lega o no:

Non legato, è legato.

Tecnica:

Freddo disegnato, freddo disegnato/rotto freddo/freddo disegnato/freddo disegnato roll-roll

Seconda o seconda?:

Non secondari

Forma di sezione:

Girare

Diametro esterno (round):

10 - 630 mm

Pipe speciali:

Tubo di acciaio senza cuciture di precisione

Superficie:

Requisiti dei clienti

Forma:

Forma rotonda

Nome prodotto:

tubi di acciaio senza saldatura

Tipo:

Tubo d'acciaio rotondo senza cuciture

Descrizione del prodotto

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:

Tubi saldati trafilati a freddo,

Tubo d'acciaio galvanizzato senza cuciture,

tubo senza saldatura laminato a freddo

Prodotti raccomandati

Trattamento di superficie lubrificato metropolitana d'acciaio trafilata a freddo senza cuciture EN10216 2 per la caldaia

Contatta ora

Metropolitane d'acciaio trafilata a freddo senza cuciture rotolata ad alta resistenza un diametro esterno da 6 - 350 millimetri

Contatta ora

Tubi saldati trafilati a freddo meccanici, metropolitana saldata cucitura resistente all'uso

Contatta ora

Tubo rotondo del acciaio al carbonio di Erw di alta precisione, tubo saldato Erw idraulico

Contatta ora

Trattamento di superficie saldato della metropolitana dell'anti olio d'acciaio trafilato a freddo senza cuciture della ruggine

Contatta ora

Metropolitana d'acciaio trafilata a freddo senza cuciture ASTM ad alta pressione A192 della caldaia dello scambiatore di calore

Contatta ora

Tubo senza saldatura dello scambiatore di calore ASTM A179, metropolitana trafilata a freddo dell'acciaio a basso tenore di carbonio

Contatta ora

Alta precisione saldata senza cuciture trafilata a freddo del tubo di BACCANO 2393 per industria automobilistica

Contatta ora

Metropolitana d'acciaio trafilata a freddo senza cuciture del cilindro rotondo dell'olio con la norma EN10305 1

Contatta ora

Metropolitana d'acciaio trafilata a freddo senza cuciture del acciaio al carbonio, metropolitana rotonda dell'acciaio della cavità di ERW

Contatta ora

Metropolitana d'acciaio trafilata a freddo senza cuciture di ASTM A519, tubo d'acciaio senza cuciture del carbonio di precisione

Contatta ora

Dettagli dei prodotti

prodotti

Metropolitana senza cuciture dell'acciaio di precisione

tubo d'acciaio trafilato a freddo senza cuciture

Metropolitana dell'acciaio del cilindro idraulico

Pezzi meccanici di CNC

Parti di alluminio di CNC

Parti d'ottone di CNC

Parti di giro di CNC

Metropolitana dell'acciaio dello scambiatore di calore

tubo in acciaio al carbonio

tubo dell'acciaio legato

Metropolitana d'acciaio saldata

tubo dell'acciaio per costruzioni edili

Tubo d'acciaio automobilistico

JIS G3444 Carbon Steel seamless Tubes For General Structural Purpose

MOQ:	1 tonnellata
prezzo:	Negoziabile
Imballaggio standard:	In fasci o in scatole di legno.
Periodo di consegna:	20-40 giorni
metodo di pagamento:	L/C, D/A, D/P, T/T, Western Union, MoneyGram
Capacità di approvvigionamento:	60000 tonnellate/tonnellate all'anno

Informazioni dettagliate

Descrizione del prodotto

Informazioni dettagliate

Luogo di origine

Zhejiang/Cina

Marca

TORICH

Certificazione

ISO9001 ISO 14001 TS16949

Numero di modello

JIS G3444

Grado:

STK290 STK400 STK490 STK500 STK540

Spessore:

10 - 200 millimetri

Applicazione:

Scopo strutturale generale

Standard:

ASTM

Certificazione:

CE,BV,ISO9001,API,ISO

Lega o no:

Non legato, è legato.

Tecnica:

Freddo disegnato, freddo disegnato/rotto freddo/freddo disegnato/freddo disegnato roll-roll

Seconda o seconda?:

Non secondari

Forma di sezione:

Girare

Diametro esterno (round):

10 - 630 mm

Pipe speciali:

Tubo di acciaio senza cuciture di precisione

Superficie:

Requisiti dei clienti

Forma:

Forma rotonda

Nome prodotto:

tubi di acciaio senza saldatura

Tipo:

Tubo d'acciaio rotondo senza cuciture

Quantità di ordine minimo:

1 tonnellata

Prezzo:

Negoziabile

Imballaggi particolari:

In fasci o in scatole di legno.

Tempi di consegna:

20-40 giorni

Termini di pagamento:

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

Capacità di alimentazione:

60000 tonnellate/tonnellate all'anno

Descrizione del prodotto

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: