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Delong Metal Product Co., Ltd.Professional steel manufacturer
Global sales hotline:+86 13270133639
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Addr: No.118, Beihuan Road, Xishan District, Wuxi

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Ms Steel carbon ASTM A53 black iron tube weld pipe

The steel grade of our products have carbon structural steel, carbon tool steel, carbon spring steel, stainless steel, heat-resistant steel, wear-resistant steel, alloy spring steel, alloy structural steel, bearing steel, alloy tool steel, high alloy tool


Delong Metal is group company in the steel manufacture & Trading, founded in the 2000s, 800+ staff, 25, 000+ m2 non-dust workshop, 40+ great large mills and cooperation partners in China, 4000, 000+ MT production per year under ISO management, 40, 000+customers in domestic and overseas market, 10 billion USD of annual turnover, 15+ subsidiary companies all over China, ranking the Top 100 private enterprises in China, 1 hour reach Shanghai/Tianjin /Guangzhou Port, we keep high quality, competitive price, thousands tons of stock, most efficient delivery and reliable cooperation for global valued customers.

About price: Our business principle is to provide customers with the best competitive price on the premise of ensuring the quality of products.

If you need to know the preparation price and chemical composition of the product, please send us an inquiry.

Our email address:

Whatsapp/ Wechat/ Skype:  +86-13301536988

The following are the specifications of different forms of weld steel materials.

ERW Steel Pipe
Diameter 1-10mm or Customized
Thickness 20-300mm or Customized
Length Customized
Material grade Q195 = S195 / A53 Grade A
Q235 = S235 / A53 Grade B / A500 Grade A / STK400 / SS400 / ST42.2
Q355 = S355JR / A500 Grade B Grade C
Standard JIS, AiSi, ASTM, GB, DIN, EN
Surface Black, Paint, Pre-Galvanized, Hot Dipped Galvanized, Powder Coated or as Customers' Requirement

LSAW Steel Pipe
Out Diameter 219mm - 1820mm (8''-72")
Wall Thickness 5.0 -50mm
Length UP to 12m
Material grade API 5L: GR B.X42.X46.X56.X60.X65.X70.X80
EN: S275, S275JR, S355JRH, S355J2H
GB: Q195.Q215.Q235. Q345. L175.L210. L245. L320. L360- L555
Standard JIS A5525, DIN 10208, ASTM A252, GB9711.1-1997
Surface Painting black or varnished or 3PE coating or galvanized

SSAW Steel Pipe
Diameter 219-3520mm or Customized
Thickness 5-30mm or Customized
Length 3m-12m or Customized
Material grade Q195, Q215, Q235, Q345(B, C, D, E)
Standard IS09001-2008, GB/T 9711-1997, SY/T 5037-2000, API 5L
Surface Painted, PE coating, Galvanized, Epoxy Coated

Each kind of WELD steel has different performance, and the specific application is also different. We will recommend the appropriate model according to the actual application of customers. If you need technical consultation, please send us information or inquiry directly.

Only some application cases are shown below:

Product Surface:

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