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JIS G3444 Carbon Steel seamless Tubes For General Structural Purpose

JIS G3444 Carbon Steel seamless Tubes For General Structural Purpose

مقدار تولیدی: 1 تن
قیمت: قابل مذاکره
بسته بندی استاندارد: در بسته های چوبی یا جعبه های چوبی.
دوره تحویل: 20-40 روز
روش پرداخت: L/C ، D/A ، D/P ، T/T ، Western Union ، MoneyGram
ظرفیت تامین: 60000 تن/تن در سال
اطلاعات دقیق
محل منبع
ژجیانگ/چین
نام تجاری
TORICH
گواهی
ISO9001 ISO 14001 TS16949
شماره مدل
JIS G3444
درجه:
STK290 STK400 STK490 STK500 STK540
ضخامت:
10 - 200 میلی متر
کاربرد:
هدف ساختاری عمومی
استاندارد:
ASTM ، DIN ، GB ، API ، JIS
گواهی:
CE,BV,ISO9001,API,ISO
آلیاژ یا نه:
غیر آلیاژی، آلیاژی است
تکنیک:
سرد کشیده ، نورد سرد/سرد/سرد/سرد کشیده شده/سرد کشیده شده
ثانویه یا نه:
غیر ثانویه
شکل بخش:
گرد
قطر بیرونی (دور):
10 - 630 میلی متر
لوله خاص:
لوله فولادی بدون درز دقیق
سطح:
نیاز مشتریان
شکل:
شکل گرد
نام محصول:
لوله استیل بدون درز
نوع:
لوله فولادی گرد بدون درز
توضیحات محصول

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 3

 

JIS G3444 Carbon Steel seamless Tubes For General Structural Purpose 4     JIS G3444 Carbon Steel seamless Tubes For General Structural Purpose 5

 

JIS G3444 Carbon Steel seamless Tubes For General Structural Purpose 6

JIS G3444 Carbon Steel seamless Tubes For General Structural Purpose 7

 

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.

محصولات توصیه شده
محصولات
جزئیات محصولات
JIS G3444 Carbon Steel seamless Tubes For General Structural Purpose
مقدار تولیدی: 1 تن
قیمت: قابل مذاکره
بسته بندی استاندارد: در بسته های چوبی یا جعبه های چوبی.
دوره تحویل: 20-40 روز
روش پرداخت: L/C ، D/A ، D/P ، T/T ، Western Union ، MoneyGram
ظرفیت تامین: 60000 تن/تن در سال
اطلاعات دقیق
محل منبع
ژجیانگ/چین
نام تجاری
TORICH
گواهی
ISO9001 ISO 14001 TS16949
شماره مدل
JIS G3444
درجه:
STK290 STK400 STK490 STK500 STK540
ضخامت:
10 - 200 میلی متر
کاربرد:
هدف ساختاری عمومی
استاندارد:
ASTM ، DIN ، GB ، API ، JIS
گواهی:
CE,BV,ISO9001,API,ISO
آلیاژ یا نه:
غیر آلیاژی، آلیاژی است
تکنیک:
سرد کشیده ، نورد سرد/سرد/سرد/سرد کشیده شده/سرد کشیده شده
ثانویه یا نه:
غیر ثانویه
شکل بخش:
گرد
قطر بیرونی (دور):
10 - 630 میلی متر
لوله خاص:
لوله فولادی بدون درز دقیق
سطح:
نیاز مشتریان
شکل:
شکل گرد
نام محصول:
لوله استیل بدون درز
نوع:
لوله فولادی گرد بدون درز
مقدار حداقل تعداد سفارش:
1 تن
قیمت:
قابل مذاکره
جزئیات بسته بندی:
در بسته های چوبی یا جعبه های چوبی.
زمان تحویل:
20-40 روز
شرایط پرداخت:
L/C ، D/A ، D/P ، T/T ، Western Union ، MoneyGram
قابلیت ارائه:
60000 تن/تن در سال
توضیحات محصول

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 3

 

JIS G3444 Carbon Steel seamless Tubes For General Structural Purpose 4     JIS G3444 Carbon Steel seamless Tubes For General Structural Purpose 5

 

JIS G3444 Carbon Steel seamless Tubes For General Structural Purpose 6

JIS G3444 Carbon Steel seamless Tubes For General Structural Purpose 7

 

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.