GOST 8734-75. Seamless Steel Tubes Cold-Formed

[Josen Dong]

GOST 8734-75. Seamless Steel Tubes Cold-Formed

 

S 5,5 - 12 mm: ± 8% Notes:  Grades: 10, 20, 35, 45, 10Mn2, 15Cr, 20Cr, 40Cr, 30CrMnSi, 15CrMo acc. to GOST 1050-88, GOST 19281-89, GOST 4543-71. Others stainlss steel grades are available subject to agreement.   Dimensions and tolerances acc. to GOST 8734-75.   Technical requirements acc. to GOST 8733-74.   Length from 1.5 to 11.5 m depending on diameter and wall thickness.

Sizes
OD, mm	WT, mm	OD, mm	WT, mm	OD, mm	WT, mm
5	0,5 - 1,5	16 - 20	0,4 - 5	45 - 48	1 - 10
6	0,5 - 2	21 - 22	0,4 - 6	50 - 56	1 - 12
7 - 8	0,5 - 2,5	23 - 24	0,5 - 4	57 - 70	1,5 - 12
9	0,4 - 3	25 - 28	1 - 7	73 - 95	2 - 12
10 - 12	0,4 - 3,5	30 - 36	1 - 8	100 - 130	2,5 - 12
13 - 15	0,4 - 4	38 - 42	1 - 9	140	3 - 12

Mechanical properties
Steel Grade	Tensile Strength, N/mm2 (min)	Yield Strength, N/mm2 (min)	Elongation, % (min)
10	343	206	24
20	412	245	21
35	510	294	17
45	589	323	14
10Mn2	422	245	22
15Cr	412	-	19
20Cr	431	-	17
40Cr	618	-	14
30CrMnSi	491	-	18
15CrMo	431	226	21

Chemical Composition (%, max)
Steel Grade	C	Si	Mn	Cr	Ni	Mo	S	P	Cu	N
10	0,07-0,14	0,17-0,37	0,35-0,65	0,15	0,3	-	-	-	-	-
20	0,17-0,24	0,17-0,37	0,35-0,65	0,25	0,25	-	0,03	0,025	0,30	0,008
35	0,32-0,40	0,17-0,37	0,50-0,80	0,25	0,30	-	0,04	0,035	0,30	-
45	0,42-0,45	0,17-0,37	0,50-0,80	0,25	-	-	-	-	-	-
10Mn2	0,07-0,15	0,17-0,37	1,2-1,6	0,30	0,30	-	0,035	0,035	0,30	-
20Cr	0,17-0,23	0,17-0,37	0,50-0,80	0,70-1,0	0,30	-	0,035	0,035	0,30	-
40Cr	0,36-0,44	0,17-0,37	0,50-0,80	0,80-1,10	0,30	-	0,035	0,035	0,30	-
30CrMnSi	0,28-0,34	0,90-1,20	0,80-1,10	0,80-1,10	0,30	-	0,005	0,025	-	-
15CrMo	0,11-0,18	0,17-0,37	0,40-0,70	0,80-1,10	0,30	0,40-0,55	0,025	0,025	0,30	-

 

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 Josen Dong  (General manager)
JIANGSU TIANCHENG GROUP LIMITED

Add: Hongzhuang Industrial Zone 7#, Yaoguan Town, Changzhou City, Jiangsu Province. the People's Republic of China. TEL: +86-519-88387662   +86-13337883086    FAX: +86-519-82076060  MSN: jo...@steel-tube.com SKYPE: josen_dong Website: http://www.steel-tube.com  http://www.tiancheng.org   http://www.din2391.cn   http://www.josen.net E-mail:  jo...@steel-tube.com      stee...@foxmail.com  jo...@tiancheng.org

[Josen Richmond Dong]

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