IK-CHINA LIMITED Special manufacturer of boiler tubes, heat exchanger tubes, L, LL, KLM finned tubes, high frequency welded helical (spiral) finned tubes, serrated finned tubes, hot dipped galvanized oval (elliptical) finned tubes, rectangular finned tubes, condenser fin flat tubes, extruded finned tubes, G embedded finned tubes, laser welded finned tubes, Oval finned tubes, aluminum plates, aluminum welding rods, seamless finned tubes with two longitudinal opposite fins, studded pipes, double H finned tubes, casting alloy tubes HK40 (reformer tubes), inner finned tubes, longitudinal finned tubes, air cooled heat exchanger, economizers, elbows, welded pipes

Grade T5c shall have a titanium content of not less than 4 times the carbon content and not more than 0.70%.
2 Grade T91 - other elements: Cb 0.06 - 0.10; N 0.030 - 0.070; Ni 0.40max; Al 0.04max.
3 Grade T92 - other elements: W 1.50 - 2.00; Cb 0.04 - 0.09; B 0.001 - 0.006; N 0.03 - 0.07; Ni 0.40max; Al 0.04max.
4 Grade 18Cr-2Mo shall have Ti + Cb = 0.20 + 4(C + N)min, 0.80max, other elements Nmax0.035; (Ni + Cu)max1.00.

Grade	C	Si	Mn	P	S	Cr	Mo	V	YSmin	TSmin	El (%)
									KSI [MPa]	KSI [MPa]
T2	0.10-0.20	0.10-0.30	0.30-0.61	0.025	0.025	0.50-0.81	0.44-0.65	...	30[205]	60[415]	30
T5	0.15max	0.50max	0.30-0.60	0.025	0.025	4.00-6.00	0.45-0.65	...	30[205]	60[415]	30
T5b	0.15max	1.00-2.00	0.30-0.60	0.025	0.025	4.00-6.00	0.45-0.65	...	30[205]	60[415]	30
T5c1	0.12max	0.50max	0.30-0.60	0.025	0.025	4.00-6.00	0.45-0.65	...	30[205]	60[415]	30
T9	0.15max	0.25-1.00	0.30-0.60	0.025	0.025	8.00-10.00	0.90-1.10	...	30[205]	60[415]	30
T11	0.05-0.15	0.50-1.00	0.30-0.60	0.025	0.025	1.00-1.50	0.44-0.65	...	30[205]	60[415]	30
T12	0.05-0.15	0.50max	0.30-0.61	0.025	0.025	0.80-1.25	0.44-0.65	...	32[220]	60[415]	30
T17	0.15-0.25	0.15-0.35	0.30-0.61	0.025	0.025	0.80-1.25	...	0.15	30[205]	60[415]	30
T21	0.05-0.15	0.50max	0.30-0.60	0.025	0.025	2.65-3.35	0.80-1.06	...	30[205]	60[415]	30
T22	0.05-0.15	0.50max	0.30-0.60	0.025	0.025	1.90-2.60	0.87-1.13	...	30[205]	60[415]	30
T912	0.08-0.12	0.20-0.50	0.30-0.60	0.020	0.010	8.00-9.50	0.85-1.05	0.18-0.25	60[415]	85[585]	20
T923	0.07-0.13	0.50max	0.30-0.60	0.020	0.010	8.50-9.50	0.30-0.60	0.15-0.25	64[440]	90[620]	20
18Cr-2Mo4	0.025max	1.00max	0.30-0.60	0.040	0.030	17.5-19.5	1.75-2.50	...	40[275]	60[415]	20

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