GB 5310 Seamless Boiler Pipe

GB 5310 pipe’s main application is high pressure pipeline tube in boiler project (superheater tubes, reheater tubes, windpipe), it is featured with high strength and high resistance to corrosive conditions.

Chemical Compositions(%) of GB 5310-2008

Steel grade C Si Mn P S Cr Mo Cu Ni V
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
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

Mechanical Properties of -2008

Steel Grade Yield Strength (Mpa) Tensile Strength (Mpa) Elongation (%)
20G 410-550 245 24
20MnG ≥415 240 22
25MnG ≥485 275 20
15MoG 450-600 270 22
12CrMoG 410-560 205 21
12Cr2MoG 450-600 280 20
12Cr1MoVG 470-640 255 21
12Cr2MoWVTib 540-735 345 18
10Cr9Mo1VNb ≥585 ≥415 ≥20
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