GB423675A - Cast-iron pipe and method of manufacturing same - Google Patents

Cast-iron pipe and method of manufacturing same

Info

Publication number
GB423675A
GB423675A GB2193533A GB2193533A GB423675A GB 423675 A GB423675 A GB 423675A GB 2193533 A GB2193533 A GB 2193533A GB 2193533 A GB2193533 A GB 2193533A GB 423675 A GB423675 A GB 423675A
Authority
GB
United Kingdom
Prior art keywords
temperature
per cent
pipe
exceeding
minutes
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB2193533A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
INT DE LAVAUD Manufacturing CORP Ltd
Original Assignee
INT DE LAVAUD Manufacturing CORP Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by INT DE LAVAUD Manufacturing CORP Ltd filed Critical INT DE LAVAUD Manufacturing CORP Ltd
Priority to GB2193533A priority Critical patent/GB423675A/en
Publication of GB423675A publication Critical patent/GB423675A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C37/00—Cast-iron alloys

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Articles (AREA)

Abstract

In the annealing of a centrifugally cast iron pipe, the pipe is heated to a temperature of 1650-1725 DEG F., to initiate but not complete the decomposition of iron carbide, the temperature then being reduced to 1450-1350 DEG F., at a sufficiently rapid rate to retard materially the solution of the phosphorus, and the pipe is maintained at that temperature until the combined carbon contact is reduced to 0,15 per cent, and finally cooled. The temperature of the pipe is raised to 1650-1725 DEG F., in a period not exceeding 40 minutes, and maintained at that temperature for a period not exceeding 15 minutes. The temperature of the pipe is then decreased to 1450-1350 DEG F., in a period not exceeding 24 minutes and then maintained at that temperature for a period not exceeding 16 minutes. The iron used has the following composition:-3,00-3,85 per cent of carbon, 1,2-3 per cent of silicon, 0,05-0,15 per cent of sulphur, 0,2-0,8 per cent of manganese and 0,2-2 per cent of phosphorus.
GB2193533A 1933-08-04 1933-08-04 Cast-iron pipe and method of manufacturing same Expired GB423675A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2193533A GB423675A (en) 1933-08-04 1933-08-04 Cast-iron pipe and method of manufacturing same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2193533A GB423675A (en) 1933-08-04 1933-08-04 Cast-iron pipe and method of manufacturing same

Publications (1)

Publication Number Publication Date
GB423675A true GB423675A (en) 1935-02-04

Family

ID=10171269

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2193533A Expired GB423675A (en) 1933-08-04 1933-08-04 Cast-iron pipe and method of manufacturing same

Country Status (1)

Country Link
GB (1) GB423675A (en)

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