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ISO 559-77 welded or seamless steel tubes

ISO 559-77 welded or seamless steel tubes

USE FOR WATER SEWAGE AND GAS

Description

Specifies the technical conditions for delivery of seamless and welded steel tubes for the conveyance of water and sewage at temperatures between - 10 °C and 120 °C. Does not apply to steel tubes in accordance with ISO 65 and similar plain end tubes.

Chemical composition

GradeMtg.processChemical composition %
C (max)SiMnP(max)S (max)NiCrMoothers
TSOS--
0.0600.060----
TWOW--
0.0600.060----
TS1S0.16-0.30-0.700.0500.050----
TW1W0.16-0.30-0.700.0500.050----
TS4S0.170.350.40-0.800.0450.045----
TW4W0.170.350.40-0.800.0450.045----
TS9S0.210.350.40-1.200.0450.045----
TW9W0.210.350.40-1.200.0450.045----

Mechnical properties

GradeTensile Test MPa

Remarks

 (similiar to JIS )

possibility 

temperature

Min Yield pointTensile Strength
TSO-320-520-
TWO-320-520(SGP)
TS1195320-440-
TW1195320-440-
TS4215360-480(STPG370)
TW4215
360-480(STPG370)
TS9
235410-530(STPG410)
TW9235410-530(STPG410)


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