Good quality black iron mild black square steel tube

Carbon low alloy steel:
ASTM A36/A36M A36
ASTM A283/A283M A283Grade C
ASTM A572/A572M A572Grade 50
ASME SA36/SA36M SA36
ASME SA283/SA283M SA283Grade C
ASME SA572/SA572M SA572Grade 50
EN10025-2 S235JR
EN10025-2 S355JR
EN10025-2 S355J2
JIS G3101 SS400
JIS G3106 SM570
DIN 17100 St37-2 St52-3
GB/T700 Q235B
GB/T1591 Q345B Q345D

Boiler and pressure vessel steel
ASTM A516/A516M A516 Grade 70
ASTM A537A537M A537 Class 1
EN10028-2 16Mo3
GB713 Q245R Q345R
Gas cylinder steel
JIS G3116 SG295
GB6653 HP265

Shipbuilding steel plate
ASTM A131 A AH36 EH36
ABS A AH36 EH36
LR A AH36 EH36
BV A AH36 EH36


Pipeline steel pipe
API Spec 5L PSL1 Grade B (L245) API 5L X42 (L290) API 5L X52 (L360) API 5L X60 (L415) API 5L X70 (L485)
API Spec 5L PSL2 Grade B (L245) API 5L X42 (L290) API 5L X52 (L360) API 5L X60 (L415) API 5L X70 (L485)


Weathering steel
CORTEN Corten A
EN 10025-5 S355J2WP
EN 10155 S355J2WP
TB/T 1979 09CuPCrNi-A 05CuPCrNi
GB/T 4171 Q355GNH Q355NH
JIS G3125 SPA-H SPA-C
A242/A242M A242 Type 1


Alloy steel
EN10083-3 51CrV4
GB/T 3077 12Cr1MoV 20Cr 40Cr 15CrMo 30CrMo 35CrMo 42CrMo


Stainless steel
AUSTENITIC SERIES 201 SUS 201 304 SUS 304 321 SUS 321 304L SUS 304L 316 SUS 316 316L SUS 316L 316 SUS 316 316L SUS 316L 904L 309S SUS 309 310S SUS 310S
FERRITE SERIES 430 SUS 430
MARTENSITIC SERIES 410 SUS 410


Structural Steel Pipe
ASTM A53: GR.B
ASTM A106: Gr.B,
GB/T 8162: 20#, 45#, Q345B, Q345D, 40Cr, 35CrMo, 42CrMo
ASTM A519: 1020, 1045, 4130, 4140
DIN17175: St35.8, 17Mn4, 13CrMo44
EN10297: E355, C45, 34CrMo4


Line Pipe
API 5L PSL1 : Gr.B, X42, X52, X56, X60, X70,
API 5L PSL2: Gr.B, X42, X52, X56, X60, X70,
Boiler Pipe
DIN17175: St35.8, St45.8, 15Mo3, 13CrMo44,
ASME SA106M: SA106B,
ASME SA179: SA179
ASME SA335: P9, P91
ASME SA213: T9,
ASME SA192M: SA192
ASME SA210M: SA210C
GB/T 5310: 20G,
GB/T 3087: 20#


Pipe for Conveyance of Fluid
ASTM A53M: GR.B
ASTM A106M: Gr.B,
GB/T 8163: 10#, 20#, Q345B, Q345D,


Gas Cylinder Pipe
GB/T 18248: 30CrMo, 35CrMo, 34CrMo4,


Fine Grain Structure Pipe
EN 10210: S355J0H, S355J2H,
7. Pipe for Pressure Purposes:
EN10216-2: P265GH, 16Mo3,

Tubing and Casing
API 5CT: J55, K55, N80,


Shaped steel
Hot rolled section steel: I-beam Angle steel Channel grade:
EN 10025-2 S235JR S355JR S355J2
ASTM A36 ASTM A283GR.C A572GR.50
GB/T700 Q195 Q235A Q235B
GB/T1591 GBT16270 Q345B Q345C Q345D
Corten Material
Corten A Corten B B480GNQR SPA-H S355J2WP
09CuPCrNi-A 05CuPCrNi

1.Grander mobile CNC boring and milling machine
Max process size : 10500*5500mm
Tolerance: 0.05mm
Reference product :
2. CNC Gantry type machining center
Max process size : 4100*2800mm
Tolerance: 0.02mm
Reference product:
3. Floor-type Horizontal boring machine
Max process size : 3000*1700*1800mm
Tolerance: 0.02mm
4. Program control Fixed-beam planner Grinder
Max process size : 5500*2500mm
Tolerance: 0.03mm
5. Vertical machining center
Max process size : 1500*800mm
Tolerance: 0.02mm
6. Program Control Fixed-beam planner Miller
Max process size : 5500*2500mm
Tolerance: 0.2mm
7. Edge Milling machine
Max process size : 3000*10000mm
Tolerance: 0.3mm
8. Small Milling Machine
Max process size : 4000*1400mm
Tolerance: 0.2mm
9. Welding workshop
10. CNC Flame / Plasma cutting
Max process size : 15000*5000mm
Tolerance: 2mm
11. Pre-treatment of the steel plate and profile steel
Standard : ISO SA2.5
Process : blasting + shop primer
Max process size : 3000*15000mm
12. Hot Galvanizing
Max process size : 3000*1800*12500mm
China Good quality black iron mild black square steel tube ,BBN keeps more than 10,000 tons Good quality black iron mild black square steel tube in stock each month.We can meet our customer's any quantity request.Based on these stock source, our advantage industry spread into steel process like:cutting ( any size and any shape ) drilling,welding,milling,machining and steel structure.if you want to know more,don't miss.

BBN Will return you with high-quality Good quality black iron mild black square steel tube and complete after-sale service with the lowest price. we committed to exceed customer's expectation on the basis of quality, price, and delivery. We sincerely hope to establish long-term cooperation relationship with you on the basis of mutual benefit, reciprocity and common development. As Good quality black iron mild black square steel tube suppliers, we can supply Good quality black iron mild black square steel tube Chemical, Good quality black iron mild black square steel tube Mechanical and Good quality black iron mild black square steel tube standard for you ,please contact us

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Cast Iron. Tube; Round; All of our Mild Steel range, including our vast Square and We look forward to supplying you with superior-quality, Mild Steel products

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