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GOST 8732-78 Seamless Hot-worked Steel Pipes |
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Standard: GOST 8732-78
Equivalent Standard: ASTM A106, ASTM A53, EN 10216-1, DIN 1629 |
Material: 15ChM
Equivalent Material: 15CrMo |
Chemistry Composition |
C, % |
Si, % |
Mn, % |
Cr, % |
Ni, % |
Mo, % |
S, % |
P, % |
Cu, % |
0.11-0.18 |
0.17-0.37 |
0.40-0.70 |
0.80-1.10 |
0.30 max |
0.40-0.55 |
0.025 max |
0.025 max |
0.30 max |
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Mechanical Properties |
Tensile Strength, MPa |
Yield Strength, MPa |
Elongation, % |
431 min |
225 min |
21 min |
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Outside Diameter & Tolerance |
Outside Diameter, mm |
Tolerance |
32≤OD≤50 |
±0.5mm |
51≤OD≤219 |
±1% |
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Wall thickness & Tolerance |
Wall Thickness, mm |
Tolerance, % |
3≤OD≤15 |
+12.5/-15 |
16≤OD≤30 |
±12.5 |
32≤OD≤45 |
+10/-12.5 |
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GOST 8732-78 applies to hot-worked seamless steel pipes of general purpose, manufactured by outside diameter, wall thickness and length. |
Manufacture: the tubes shall be manufactured by cold drawn and hot rolled.
Delivery Condition: heat treated.
Inspection & Test: chemical composition analysis, elongation test, hardness test, flattening test, bending test, flaring test, NDT, surface inspection and dimension check. |
Length: 4000mm; 6000mm; 6500mm; 10000mm; 12010mm; and so on.
Max developed length: 30 meters, also U bending, finning, studded process can be provided.
Option: shot blasting on the outside surface to remove mill scale, make the surface matte colour; surface polishing as preparation work done for further processing, for instance finning. |
Keyword: GOST 8732-78, Steel Pipe, Hot worked Steel Pipe, Seamless Steel Pipe |
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