JIS G3461 Grade STB510 Seamless Carbon Steel Tube

• After-sales Service: Change/Return
• Warranty: 1 Year
• Type: Seamless
• Technique: Hot Rolled
• Material: Carbon Steel
• Surface Treatment: Black
• Usage: Pipeline Transport, Boiler Pipe
• Section Shape: Round
• Surface: Black
• Length: Fixed or Radom Length
• Inspection: Ut, Hydro, Eddy Test Passed
• Mill′s Test Certificate: En10204 3.1 or 3.2 on Request
• Transport Package: in Wooden Case, Woven Bag or as Request
• Specification: 15.9-138.9
• Trademark: KM/OEM
• Origin: China
• HS Code: 730490
• Production Capacity: 1000ton/Month

Product Description

JIS G3461 Grade STB510 Seamless Carbon Steel Tube
 

JIS G3461 Grade STB 510 Carbon Steel Seamless Tubes are also known as mild steel pipes and tubes.JIS G3461 Grade STB 510 Tubes are low-cost Low Carbon Steel Tubes with max 025 % carbon content with combination of 100-150 % manganese easy to form and shape .These pipes are manufactured as per JIS Specification and commercially referred as cs pipes or ms pipes.Low Carbon Steel Pipes are not as hard as hig carbon steel pipes,Though carburizing can increase its surface hardness.

Chemical Composition
The tube shall be tested in accordance with 9.1 and the resulting ladle analysis values shall conform to Table 2.
 Table 2 Chemical Composition

Standard	Grade	Chemical Composition Limits (%)
		C	Si	Mn	P	S
JIS G3461	STB 340	≤ 0.18	≤ 0.3	0.30-0.60	≤ 0.035	≤ 0.035
	STB 410	≤ 0.32	≤ 0.35	0.30-0.80	≤ 0.035	≤ 0.035
	STB 510	≤ 0.25	≤ 0.35	1.00-1.50	≤ 0.035	≤ 0.035

 

Mechanical Properties
The tube shall be tested in accordance with 9.2 and the resulting tensile strength, yield point or proof stress, and elongation of the tube shall comply with Table 3.
Table 3 Mechanical Properties

Grade	Tensile Property (N/mm2)	Yield Point or Yield Strength (N/mm2)	Rockwell hardness HRB	Elongation (%)
				OD ≥20 mm	10 mm ≤OD <20 mm	OD <10 mm
				NO. 11 Sample; NO. 12 Sample	NO. 11 Sample	NO. 11 Sample
				Longitudinal	Transverse	Transverse
STB 340	≥ 340	≥ 175	77 max.	≥ 35	≥ 30	≥ 27
STB 410	≥ 410	≥ 255	79 max.	≥ 25	≥ 20	≥ 17
STB 510	≥ 510	≥ 295	92 max.	≥ 25	≥ 20	≥ 17

Heat Treatment
 

Grade	Heat treatment
	Hot finished seamless steel tube	Cold finished seamless steel tube	Electric resistance welded steel tube other than hot finished or cold finished steel tube	Finished electric resistance welded steel tube	Fold  finished  electric resistance welded steel tube
STB 340	As manufactured, as required, low temperature  annealing  or normalizing may be performed.	Low temperature annealing,normalizing or full annealing.	Normalizing	As manufactured. However, as required, low temperature  annealing  or normalizing may be performed	Normalizing
STB 410	As  manufactured.  However,  as required, low temperature annealing or normalizing may be performed.	Low  temperature annealing, normalizing or full annealing.	Normalizing	Low temperature annealing
STB 510	Normalizing

Hardness
(1)The hardness of the tube shall be as given in Appendix 1 Table 1-1 or Table 1-2.
 
Appendix 1 Table 1-1, Hardness
 

Symbol of class	Rockwell hardness HRB (Mean value of three points)
STB 340 STB 410 STB 510	77 max. 79 max. 92 max.

Available sizes: 15.9-139.8mm OD, 1.2-12.5mm wall thickness, length: fixed or radom length