Superheater tubes and reheater tubes

Superheater tubes and reheater tubes in a comprehensive range of stainless steels and nickel alloys covering outside diameters 12 to 260 mm (0.472 to 10.24 in.).

Sandvik superheater tube and reheater tube materials cover all types of fuel, such as coal, gas, oil, black liquor and biomass. The Sandvik program also includes composite tubes consisting of two different alloys fully bonded together.

Increased efficiency in coal-fired power boilers

Our new material Sanicro 25 is engineered for the next generation of coal-fired power boilers, contributing to significantly greater efficiency and sharply lower CO2 emissions. It is ideal for superheater and reheater tubes, allowing for material temperatures of up to 700ºC (1290ºF). Read more about Sanicro 25.

Applications

Below are the most typical applications for Sandvik superheater and reheater tubes. Contact us for advice on product selection or other technical support.

Product standards
Sandvik grade Typical applications
Sanicro 25
(UNS S31035)
Superheater and reheater tubes in the next generation of coal-fired power boilers for material temperatures of up to 700ºC (1290ºF).
Sanicro 31HT
(UNS N08811/N08810)
Superheater and reheater tubes in boilers with corrosive conditions.
Sanicro 41
(UNS N08825)
Superheater and reheater tubes in boilers with corrosive conditions. Sanicro 41 is generally more resistant to flue gases compared to Sanicro 31HT.
Sanicro 28
(UNS 08028, EN 1.4563)
Radiant syngas coolers in IGCC gasification.
Superheater tubes in boilers with corrosive conditions. The high chromium content of Sanicro 28 contributes to high gas corrosion resistance.
Sanicro 30
(UNS N08800)
Radiant syngas coolers in IGCC gasification.
Esshete 1250
(EN 1.4982)
Superheater and reheater tubes in sub-critical and supercritical coal-fired, biomass and other boilers. Sandvik Esshete 1250 has higher creep strength than most other alloys.
Sandvik 7RE10
(UNS S31008/S31009)
Superheater tubes in boilers with corrosive conditions.
Sandvik 3R69 BT**
(EN 1.4910)
Superheater and reheater tubes in sub-critical and supercritical coal-fired boilers.
Sandvik 8R61
(EN 1.4918)
Superheater and reheater tubes in sub-critical coal-fired boilers and other boilers.
Sandvik 6LR62
(UNS S31600/S31609)
Superheater and reheater tubes in sub-critical coal-fired boilers and other boilers.
Sandvik 8R41
(EN 1.4961)
Superheater and reheater tubes in sub-critical coal-fired boilers and other boilers.
Sandvik 8R40
(UNS S34709, ASTM 347H)
Superheater and reheater tubes in sub-critical coal-fired, biomass and other boilers. Sandvik 8R40 can also be supplied in a fine-grain version.
Sandvik 6R44
(UNS S34709, ASTM 347H)
Superheater and reheater tubes in sub-critical coal-fired, biomass and other boilers.
Sandvik 6R35
(UNS S32109, ASTM 321H)
Superheater and reheater tubes in sub-critical coal-fired boilers and other boilers.
Sandvik 5R10
(UNS S30409, ASTM 304H)
Superheater and reheater tubes in sub-critical coal-fired boilers and other boilers.

*Esshete 1250 is a trademark owned by Corus

Materials

Superheater and reheater tube materials (other grades can be offered on request)

Sandvik gradeUNSASTMEN steel no.EN name
Sanicro 251) S31035 - 1) -
Sanicro 31HT2) N08811/N08810 800HT 1.4959 X8NiCrAlTi32-21
Sanicro 41 N08825 (Alloy 825)5) 2.4858 -
Sanicro 283) N08028 (Alloy 28)5) 1.4563 X1NiCrMoCu31-27-4
Sanicro 30 N08800 (Alloy 800)5) 1.4558 X2NiCrAlTi32-20
Esshete 12504) S21500 - 1.4982 X10CrNiMoMnNbVB15-10-1
Sandvik 7RE10 S31008/S31009 310S/310H 1.4845 -
Sandvik 3R69  S31651 316N 1.4910 X3CrNiMoBN17-13-3
Sandvik 8R61 (S31600/S31609) (316H) 1.4918 X6CrNiMo17-13-2
Sandvik 6LR62 S31600/S31609 316H 1.4401 X5CrNiMo17-12-2 215S51
Sandvik 8R41 - - 1.4961 X6CrNiTiB18-10
Sandvik 8R40 S34709 347H 1.4550/1.4912 X7CrNiNb18-10
Sandvik 6R44 S34709 347H 1.4550/1.4912 X7CrNiNb18-10
Sandvik 6R35 S32100/S32109 321/321H 1.4541/1.4940 X7CrNiTi18-10
Sandvik 5R10 S30400/S30409 304/304H 1.4948 X6CrNi18-10

1) Approved by VD TÜV 555

2) Approved by VD TÜV 434

3) Approved by VD TÜV 483
4) Approved by VD TÜV 520. Esshete 1250 is a trademark owned by Corus
5) Common name

CountryStandardSpecification
Product standards
American ASME SA213
ASTM A213
Seamless ferritic and austenitic alloy steel boiler, superheater and heat exchanger tubes.
British BS3059
BS3605
Steel boiler and superheater tubes. Seamless and welded austenitic stainless steel pipes and tubes for pressure purposes.
European EN 10216-5 Seamless steel tubes for pressure purposes.
French NFS 49-214 Steel tubes and seamless austenitic steel tubes for use at high temperatures.
German DIN 17459
AD Merkblatt W2
High temperature seamless circular stainless steel tubes. Materials for pressure vessels – austenitic steels.
Japanese JIS G3463 Stainless steel boiler and heat exchanger tubes.
Russian TU 14-3-460-75E
TU 14-3-796-79
Steam boiler tubes and pipe-lines of high or subcritical steam parameter equipment.

Sizes and tolerances

Sandvik superheater and reheater tubes can be delivered in sizes and lengths according to below.

Outside diameter (OD)

12 to 260 mm (0.472 to 10.24 in.)

Wall thickness (WT)

2-20 mm (0.0787-0.787 in.)

Tolerances

Tolerances according to specification or according to agreement. Standard tolerances are:

Hot finished OD +/- 1% WT +/-12.5%
Cold finished OD +/-0.75% WT +/-10%

Lengths

Sandvik superheater and reheater tubes can be delivered in lengths up to 16 meters.