GB9948-2013 Petroleum Cracking Tube

• Customization: Available
• Type: Seamless
• Technique: Cold Drawn
• Model NO.: KM43
• Surface Treatment: Black
• Usage: Machinery Industry, Mining
• Section Shape: Round
• Grade: 10\20\12crmo
• Tensile Strength (MPa): 205MPa
• Elongation(%): +0.15~-0.125
• Transport Package: in Bundles
• Specification: up to 24"
• Trademark: KINGMETAL
• Origin: China
• Production Capacity: 50000 Ton/Year

Product Description

Steel Tube Types	Tube size		Allowable Deviation
Hot rolled tube	Outer diameter	≤ 159	± 1.00%
		> 159	± 1.25%
	Wall thickness	≤ 20	± 12.5%
		> 20	± 10.0%
Cold-drawn tube	Outer diameter	≤ 30	± 0.20
		30~50	± 0.30
		> 50	± 0.8%
	Wall thickness	≤ 3	+12%-10%
		> 3	± 10%

 

 Chemical composition, mechanical properties

Standard	Steel grade	Chemical composition (%)
		C	Si	Mn	Ni	Cr	Mo	P.S
GB9948	10	0.17 ~ 0.14	0.17 ~ 0.37	0.35 ~ 0.65	≤ 0.25	≤ 0.15	/	≤ 0.035
	20	0.17 ~ 0.24	0.17 ~ 0.37	0.35 ~ 0.65	≤ 0.25	≤ 0.25	/	≤ 0.035
	12CrMo	0.08 ~ 0.15	0.17 ~ 0.37	0.40 ~ 0.70	≤ 0.30	0.40 ~ 0.70	0.40 ~ 0.55	≤ 0.035
	15CrMo	0.12 ~ 0.18	0.17 ~ 0.37	0.40~ 0.70	≤ 0.30	0.80 ~ 1.10	0.40 ~ 0.55	≤ 0.035
Mechanical properties	Tensile strength (MPa)				Tensile strength (MPa)			Elongation(%)
	10	330 ~ 490			≥ 205			≥ 24
	20	410 ~ 550			≥ 245			≥ 21
	12CrMo	410 ~ 560			≥ 205			≥ 21
	15CrMo	440 ~ 640			≥ 235			≥ 21