Seamless Tubes for Boilers

Specification
GB3087, GB5310, DIN17175

Application
The seamless tube can be used on the low- and medium-pressure boiler whose pressure is generally no more than 5.88MPa and operating temperature below 450℃. It is usually employed as the heat pipe, economizer tube, superheater tube, and reheater pipe for high-pressure boilers with operating pressure normally above 9.8MPa and temperature between 450℃ and 650℃. Another use of our seamless tube is in the petrochemical industry.

Material
10, 20, 20G, 20MnG, 25MnG, 15CrMoG, 12Cr2MoG, 12Cr1MoVG

Chemical Composition
Specification Grade Chemical Composition (%)
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
12Cr2 MoWVTiB 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
10Cr9 Mo1VNb 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
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
Mechanical Properties
Specification Grade Tensile Strength (MPa) Yield Strength (MPa) Percentage 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 /
DIN17175 ST45.8/III 410 ~530 ≥255 ≥21 /
15Mo3 450 ~600 ≥270 ≥22 /
13CrMo44 440 ~590 ≥290 ≥22 /
10CrMo910 480 ~630 ≥280 ≥20 /