GOST 8731-74/8732-78 Seamless Steel Hot-Worked Pipe

• Customization: Available
• Type: Seamless
• Technique: Cold Drawn
• Model NO.: GOST 8731-74 Seamless Steel Hot-worked Pipe
• Surface Treatment: Black
• Usage: Pipeline Transport, Machinery Industry, Chemical Industry, Construction & Decoration, Special Purpose
• Section Shape: Round
• Size: 10mm~610mm
• Thickness: 1.65mm~60mm
• Standards: GOST8731,GOST 8732,GOST 8734-78,GOST 8733-74,GOST
• Materials: 10#,20#,Q195,Q235,Q345,Gr.a,Gr.B,15X1m,15X5m, etc.
• Surface: Black Painting, Varnish Coating, Oils, etc
• Ends: Plain Ends, Bevel Ends
• Transport Package: in Bundle or Customer′s Request
• Specification: 10mm~610mm
• Trademark: Kingmetal
• Origin: China
• HS Code: 73041930
• Production Capacity: 3000 Tons/Month

Product Description

GOST 8731-74/8732-78 Seamless Steel Hot-worked Pipe

OD: 10mm-610mm
W. T.: 1.65-60mm
Standard: GOST8731,GOST 8734-78,GOST 8732,GOST 8733-74,GOST 550-75,et
Material: 10#,20#,Q195,Q235,Q345,Gr.A,Gr.B,15X1M,15X5M, etc.

Dimensions of pipes and tolerances according to GOST 8732-78.
Technical requirements according to GOST 8731-74.
Length from 4 up to 11.7 m depending on diameter and wall thickness.
Groups of metrics of quality:
BВ - with rate setting of chemical composition for killed steel (grades according to GOST 1050-88, GOST 4543-71, GOST 19281-89);
V - with rate setting of mechanical properties and chemical composition;
G - with rate setting of chemical composition and control of mechanical properties for heat-treated samples. Mechanical properties are according to steel standards.
 

Deminsion
OD, mm	WT, mm	OD, mm	WT, mm	OD, mm	WT, mm
32 - 33,7	2,8 - 4,0	89 - 95	3,5 - 24	146	5 - 38
38 - 42,4	3 - 4,5	102 - 108	4 - 28	152	5 - 40
45 - 54	3,5 - 6,0	114	4,5 - 28	159	5 - 42
57 - 68	3,5 - 14	121	5 - 30	168 - 194	6 - 45
70	3,5 - 16	127	5 - 32	203 - 219	8 - 45
73 - 76	3,5 - 20	133	5 - 35
82,5 - 83	3,5 - 22	140	5 - 36

 

Mechanical properties
Steel Grade	TS, N/mm2(min)	YS,N/mm2 (min)	E, % (min)
10	353	216	24
20	412	245	21
35	510	294	17
45	588	323	14
10Mn2	421	265	21
20Cr	431	-	16
40Cr	657	-	9
30CrMnSi	686	-	11
15CrMo	431	225	21
30CrMn	588	392	13

 

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

15Х5МChemical composition(mass fraction)(wt.%)
Elements	Min.(≥)	Max.(≤)
C	-	0.15
Si	-	0.5
Mn	-	0.5
P	-	0.03
S	-	0.025
Cr	4.5	6
Ni	-	0.6
Mo	4.5	6
W	-	0.03
Ti	-	0.03
V	-	0.05