OD Tolerance	4-30mm	31-40mm	41-50mm	51-60mm	61-70mm	71-80mm	81-90mm	91-100mm
	±0.08mm	±0.15mm	±0.20mm	±0.25mm	±0.30mm	±0.30mm	±0.40mm	±0.45mm
WT Tolerance	±10%

Chemical Composition
Grade	C	Si	Mn	P	S	Al Min	V	Others
E215	≤0.1	≤0,05	<0.70	≤0,025	≤0,025	0,025	-	-
E235	≤0,17	≤0,17	<1,20	≤0,025	≤0,025	-	-	-
E355	≤0,22	≤0,55	<1,60	≤0,025	≤0,025	-	-	-
E255	≤0,21	≤0,35	0,40-1,10	≤0,025	≤0,025	-	-	-
E410	0,16-0,22	0,10-0,50	1,30-1,70	≤0.03	≤0.035	0,010-0,060	0,08-0,15	Nb<0,07; Ti<0,05

Grade	Mechanical properties (Minimal)
	+C		+LC		+SR			+A		+N
	R m	A%	R m	A%	R m	R eH	A%	R m	A%	R m	R eH	A%
	MPa		MPa		MPa	MPa		MPa		Mpa	Mpa
E215	430	8	380	12	380	280	16	280	30	290 - 430	215	30
E235	480	6	420	10	420	350	16	315	25	340 - 480	235	25
E355	640	4	580	7	580	450	10	450	22	490 - 630	355	22
E255	580	5	520	8	520	375	12	390	21	440 - 570	255	21
E410	750	4	620	8	690	590	12	520	22	550- 700	410	22

H

DT is short for Hui DeTong, manufacturer of steel pipes with competetive price and good service.

With a wide range, good quality, reasonable prices and stylish designs, our products are extensively used in steel and other industries.

Our products are widely recognized and trusted by users and can meet continuously changing economic and social needs.

We welcome new and old customers from all walks of life to contact us for future business relationships and mutual success!