Alloy materials for boiler tube
The boiler tube is a kind of seamless tube. The manufacturing method is the same as that for seamless pipes, but there are strict requirements for the steel grades used to make steel pipes. According to the use of temperature is divided into general boiler tubes and high pressure boiler tubes. Boiler tubes are usually made of various alloy steel plates as master batch.
Common performance standards of boiler tube
GB3087-2008 ---- Low and medium pressure boiler seamless steel pipe
GB5310-2008 ---- High-pressure boiler seamless steel pipe
ASME / SA210-- Standard Specification for Seamless Medium-Carbon Steel Boiler and Superheater Tubes
ASME / SA213-- Standard Specification for Seamless Ferritic and Austenitic Alloy-Steel Boiler, Superheater, and Heat-Exchanger Tubes.
DIN17175-- Standard Specification for boiler installations, high pressure piping and tank constructions and special machinery for high temperature and high pressure installations.
For low and medium pressure boiler (working pressure is generally not more than 5.88Mpa, operating temperature 450 ℃ or less) heating surface tubes; for high-pressure boilers (above 9.8Mpa working pressure in general, the working temperature of 450 ℃ between ~ 650 ℃) heating surface tubes economizer, superheater, reheater, petrochemical industrial pipe.
Materials of boiler tube
20MnG, 25MnG, 15CrMoG, 35crmo42crmo12Cr2MoG, 12Cr1MoVG, 12Cr2MoWVTiB, 10Cr9Mo1VNb, 10crmoal9cr5mo.9cr18moSA210A1, SA210C, SA213 T11, SA213 T12, SA213 T22, SA213 T23, SA213 T91, SA213 T92, ST45.8 / Ⅲ, 15Mo3,13CrMo44,10CrMo910 etc. .
Mechanical properties of boiler tubes of different materials
| standard | Trademark | Tensile strength (MPa) | Yield strength (MPa) | Elongation(%) | hardness |
| GB3087 | 10 | 335～475 | ≥195 | ≥24 | / |
| 20 | 410～550 | ≥245 | ≥20 | / | |
| GB5310 | 20G | 410～550 | ≥245 | ≥24 | / |
| 20MnG | ≥415 | ≥240 | ≥22 | / | |
| 25MnG | ≥485 | ≥275 | ≥20 | / | |
| 15CrMoG | 440～640 | ≥235 | ≥21 | / | |
| 12Cr2MoG | 450～600 | ≥280 | ≥20 | / | |
| 12Cr1MoVG | 470～640 | ≥255 | ≥21 | / | |
| 12Cr2MoWVTiB | 540～735 | ≥345 | ≥18 | / | |
| 10Cr9Mo1VNb | ≥585 | ≥415 | ≥20 | / | |
| ASME SA210 | SA210A-1 | ≥415 | ≥255 | ≥30 | ≤143HB |
| SA210C | ≥485 | ≥275 | ≥30 | ≤179HB | |
| ASME SA213 | SA213 T11 | ≥415 | ≥205 | ≥30 | ≤163HB |
| SA213 T12 | ≥415 | ≥220 | ≥30 | ≤163HB | |
| SA213 T22 | ≥415 | ≥205 | ≥30 | ≤163HB | |
| SA213 T23 | ≥510 | ≥400 | ≥20 | ≤220HB | |
| SA213 T91 | ≥585 | ≥415 | ≥20 | ≤250HB | |
| SA213 T92 | ≥620 | ≥440 | ≥20 | ≤250HB | |
| DIN17175 | ST45.8/Ⅲ | 410～530 | ≥255 | ≥21 | / |
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15Mo3 | 450～600 | ≥270 | ≥22 |
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| 13CrMo44 | 440～590 | ≥290 | ≥22 | / | |
| 10CrMo910 | 480～630 | ≥280 | ≥20 | / |
Chemical properties of boiler tubes of different materials
| standard | Trademark | C | Si | Mn | P | S | Cr | Mo | Cu | Ni | V | Al | W | Ti | Nb | N |
| GB3087 | 10 | 0.07～0.13 | 0.17～0.37 | 0.38～0.65 | ≤0.030 | ≤0.030 | 0.3～0.65 | / | ≤0.25 | ≤0.30 | / | / | ||||
| 20 | 0.17～0.23 | 0.17～0.37 | 0.38～0.65 | ≤0.030 | ≤0.030 | 0.3～0.65 | / | ≤0.25 | ≤0.30 | / | ||||||
| GB5310 | 20G | 0.17～0.24 | 0.17～0.37 | 0.35～0.65 | ≤0.030 | ≤0.030 | ≤0.25 | ≤0.15 | ≤0.20 | ≤0.25 | ≤0.08 | |||||
| 20MnG | 0.17～0.24 | 0.17～0.37 | 0.70～1.00 | ≤0.030 | ≤0.030 | ≤0.25 | ≤0.15 | ≤0.20 | ≤0.25 | ≤0.08 | ||||||
| 25MnG | 0.18～0.24 | 0.17～0.37 | 0.80～1.10 | ≤0.030 | ≤0.030 | ≤0.25 | ≤0.15 | ≤0.20 | ≤0.25 | ≤0.08 | ||||||
| 15CrMo | 0.12～0.18 | 0.17～0.37 | 0.40～0.70 | ≤0.030 | ≤0.030 | 0.80～1.10 | 0.40～0.55 | ≤0.20 | ≤0.30 | |||||||
| 12Cr2MoG | 0.08～0.15 | ≤0.50 | 0.40～0.70 | ≤0.030 | ≤0.030 | 2.00～2.50 | 0.90～1.20 | ≤0.20 | ≤0.30 | |||||||
| 12Cr1MoV | 0.08～0.15 | 0.17～0.37 | 0.40～0.70 | ≤0.030 | ≤0.030 | 0.90～1.20 | 0.25～0.35 | ≤0.20 | ≤0.30 | 0.15～0.30 | ||||||
| 12Cr2MoWVTiB | 0.08～0.15 | 0.45～0.75 | 0.45～0.65 | ≤0.030 | ≤0.030 | 1.60～2.10 | 0.50～0.65 | ≤0.20 | ≤0.30 | 0.28～0.42 | 0.30～0.55 | 0.08～0.15 | B 0.002～0.008 | |||
| 10Cr9Mo1VNb | 0.08～0.12 | 0.20～0.50 | 0.30～0.60 | ≤0.020 | ≤0.010 | 8.00～9.50 | 0.85～1.05 | ≤0.20 | ≤0.40 | 0.18～0.25 | ≤0.015 | 0.06～0.10 | 0.03～0.07 | |||
| ASME SA210 | SA210A-1 | 0.13～0.19 | ≥0.1 | 0.45～0.65 | ≤0.030 | ≤0.030 | ||||||||||
| SA210C | 0.18～0.24 | ≥0.1 | 0.80～1.10 | ≤0.030 | ≤0.030 | SA210C | ||||||||||
| ASME SA213 | SA213 T11 | 0.05～0.15 | 0.50～1.0 | 0.30～0.60 | ≤0.030 | ≤0.030 | 1.00～1.50 | 0.50～1.00 | ||||||||
| SA213 T12 | 0.05～0.15 | ≤0.50 | 0.30～0.61 | ≤0.030 | ≤0.030 | 0.80～1.25 | 0.44～0.65 | |||||||||
| SA213 T22 | 0.05～0.15 | ≤0.50 | 0.30～0.60 | ≤0.030 | ≤0.010 | 1.90～2.60 | 0.87～1.13 | |||||||||
| SA213 T23 | 0.04～0.10 | ≤0.50 | 0.10～0.60 | ≤0.030 | ≤0.030 | 1.90～2.60 | 0.05～0.30 | ≤0.030 | 1.45～1.75 | B 0.0005～0.006 | 0.02～0.08 | ≤0.040 | ||||
| SA213 T91 | 0.08～0.12 | 0.20～0.50 | 0.30～0.60 | ≤0.020 | ≤0.010 | 8.00～9.50 | 0.85～1.05 | ≤0.40 | 0.18～0.25 | ≤0.015 | 0.06～0.10 | 0.03～0.07 | ||||
| SA213 T92 | 0.07～0.13 | ≤0.50 | 0.30～0.60 | ≤0.020 | ≤0.010 | 8.50～9.50 | 0.30～0.60 | ≤0.40 | 0.15～0.25 | ≤0.015 | 1.50～2.00 | B 0.001～0.006 | 0.04～0.09 | 0.03～0.07 | ||
| DIN 17175 | ST45.8/Ⅲ | ≤0.21 | 0.10～0.35 | 0.40～1.20 | ≤0.040 | ≤0.040 | ||||||||||
| 15Mo3 | 0.12～0.20 | 0.10～0.35 | 0.40～0.80 | ≤0.035 | ≤0.035 | 0.25～0.35 | ||||||||||
| 13CrMo44 | 0.10～0.18 | 0.10～0.35 | 0.40～0.70 | ≤0.035 | ≤0.035 | 0.70～1.10 | 0.45～0.65 | |||||||||
| 10CrMo910 | 0.08～0.15 | ≤0.50 | 0.30～0.70 | ≤0.025 | ≤0.020 | 2.00～2.50 | 0.90～1.10 | ≤0.30 | ≤0.30 | ≤0.015 |