SPECIFICATIONS FOR BOILER & SUPERHEATER TUBINGECIFICATIONS FOR BOILER & SUPERHEATER TUBING

SpecificationGradeTubing Description
British Standard BS 305978 Pt 1 320 (Carbon Steel)Available in Welded, Hot Finished and Cold Finished quality. For use at temperatures not exceeding 400 degrees centigrade.
Equivalent American Specifications  * ASTM A178 and A192
Equivalent German specification  * DIN 17175 St.35, 8 Grades 1/2.
 

SpecificationGradeTubing Description
British Standard BS 305978 Pt 2 360 (Carbon Steel)Available in Welded and Seamless quality. For use at higher temperatures, having specified room temperature properties and proof stress values at elevated temperatures. This grade provides for two categories of room temperature test procedure, designated TC1 and TC2, the former requiring nondestructive acceptance testing. Provision is also made for a choice of dimensional tolerance, designated SC1 and SC2 (Seamless only).
Equivalent American Specifications  * ASTM A226 and A192
Equivalent German specification  * DIN 17175 St.35, 8 Grades 2/3.
 
 
 
 

SpecificationGradeTubing Description
British Standard BS 305978 Pt 2 440 (Carbon Steel)Available in Welded and Seamless quality with test and dimension tolerance as Grade 360. Higher carbon and manganese content provides better yield and tensile strength than Grade 320 or 360.
Equivalent American Specifications  * ASTM A210 Grade A1 or C.
Equivalent German specification  * DIN 17175 St.45, 8, Grades 1-3.
 

SpecificationGradeTubing Description
British Standard BS 305978 Pt. 2 620 (1% cr, 0.5% moly alloy steel)Available in Welded and Seamless quality with test and dimension tolerance choice as per Pt. 2 carbon grades. Generally used for Super-Heater applications where higher temperatures require alloying elements to stabilise and maintain mechanical properties. This grade also affords greater resistance to corrosion.
Equivalent American Specifications  * ASTM A213 T12.
Equivalent German specification  * DIN 17175 13CrMo44.
 
 

SpecificationGradeTubing Description
British Standard BS 305978 Pt. 2 622 (2, 5% Cr, 1% Moly. alloy steel)Available in Welded and Seamless quality with test and dimension tolerance choice. This grade performs the same function as 620 but through a higher temperature range. Under this grade a choice of heat-treatment is provided ie annealed (622-440) and normalised/tempered (622-490).
Equivalent American Specifications  * ASTM A213 T22.
Equivalent German specification  * DIN 17175 10CrMo910.
 
 

NOTE: * Where equivalent specifications are shown customers are advised to view these in broad terms. The comparisons are made for general guidance only. Differences in chemical content, mechanical properties and performance levels will sometimes exist. Customers are therefore urged to obtain full details from us or consult the relevant specification journals.

Specification Grade Tubing Description
BS 3059 78 Pt 1 320 (Carbon Steel) Available in Welded, Hot Finished and Cold Finished quality. For use at temperatures not exceeding 400 degrees centigrade.
* ASTM A178 and A192
* DIN 17175 St.35, 8 Grades 1/2.

Specification Grade Tubing Description
BS 3059 78 Pt 2 360 (Carbon Steel) Available in Welded and Seamless quality. For use at higher temperatures, having specified room temperature properties and proof stress values at elevated temperatures. This grade provides for two categories of room temperature test procedure, designated TC1 and TC2, the former requiring nondestructive acceptance testing. Provision is also made for a choice of dimensional tolerance, designated SC1 and SC2 (Seamless only).
* ASTM A226 and A192
* DIN 17175 St.35, 8 Grades 2/3.

Specification Grade Tubing Description
BS 3059 78 Pt 2 440 (Carbon Steel) Available in Welded and Seamless quality with test and dimension tolerance as Grade 360. Higher carbon and manganese content provides better yield and tensile strength than Grade 320 or 360.
* ASTM A210 Grade A1 or C.
* DIN 17175 St.45, 8, Grades 1-3.

Specification Grade Tubing Description
BS 3059 78 Pt. 2 620 (1% cr, 0.5% moly alloy steel) Available in Welded and Seamless quality with test and dimension tolerance choice as per Pt. 2 carbon grades. Generally used for Super-Heater applications where higher temperatures require alloying elements to stabilise and maintain mechanical properties. This grade also affords greater resistance to corrosion.
* ASTM A213 T12.
* DIN 17175 13CrMo44.

Specification Grade Tubing Description
BS 3059 78 Pt. 2 622 (2, 5% Cr, 1% Moly. alloy steel) Available in Welded and Seamless quality with test and dimension tolerance choice. This grade performs the same function as 620 but through a higher temperature range. Under this grade a choice of heat-treatment is provided ie annealed (622-440) and normalised/tempered (622-490).
* ASTM A213 T22.
* DIN 17175 10CrMo910.


Willingale Tubes Limited,

Chilton Industrial Estate, Windham Road, Subury, Suffolk, CO10 2XD

Tel 01787 375300   Fax 01787 880108

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