Petroleum Cracking Tube

Standard:GB9948-1988

Application: For manufacturing of furnace tubes, heat exchangers and pipelines in refineries

Tolerance on Dimensions

Chemical composition and mechanical properties

Grade	Chemical Composition								Mechanical Properties
	C	Mn	Si	Cr	Mo	Ni	S	P	Tensile Strength(Mpa)	Yield Strength(Mpa)	Elongation(%)
10	0.07-0.14	0.35-0.65	0.17-0.37	≤0.15	-	≤0.25	≤0.035	≤0.035	330-490	≥205	≥24
20	0.17-0.24	0.35-0.65	0.17-0.37	≤0.25	-	≤0.25	≤0.035	≤0.035	410-550	≥245	≥21
12CrMo	0.08-0.15	0.40-0.70	0.17-0.37	0.40-0.70	0.40-0.55	≤0.30	≤0.035	≤0.035	410-560	≥205	≥21
15CrMo	0.12-0.18	0.40-0.70	0.17-0.37	0.80-1.10	0.40-0.55	≤0.30	≤0.035	≤0.035	440-640	≥235	≥21
1Cr2Mo	≤0.15	0.30-0.60	0.50-1.00	2.15-2.85	0.40-0.65	-	≤0.035	≤0.035	≥390	≥175	≥22
1Cr5Mo	≤0.15	≤0.60	≤0.60	4.00-6.00	0.45-0.60	≤0.60	≤0.035	≤0.035	≥390	≥195	≥22