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15crmog High-Pressure Boiler Tube

Quality 15crmog High-Pressure Boiler Tube factory
Quality 15crmog High-Pressure Boiler Tube factory
Quality 15crmog High-Pressure Boiler Tube factory
Quality 15crmog High-Pressure Boiler Tube factory

15crmog High-Pressure Boiler Tube

Key Attributes
Brand Name: Hengxin Zhicheng
Model Number: High-Pressure Boiler Tube
Place of Origin: CHINA
Certification: ASTM, GB, ISO, etc.
MOQ: 1 PCE
Price: Negotiation
Delivery Time: 10 to 35 days
Payment Terms: L/C, T/T
Standard Packaging: Default bare pipe bundling, or packaging according to customer requirements, such as oil cloth packaging, wooden box packaging, frame packaging
Product Custom Attributes
Product Description

15crmog High-Pressure Boiler Tube

15CrMoG is a chromium-molybdenum (Cr-Mo) alloy steel tube specifically designed for high-temperature and high-pressure applications in power generation, petrochemical, and industrial boiler systems. As a seamless steel tube, it conforms to strict international standards, including GB 5310 (China), ASTM A335 (USA), and EN 10216-2 (Europe), ensuring reliability in critical environments. The "G" in its designation denotes its use in high-pressure boiler systems, highlighting its suitability for transporting superheated steam, hot water, and other high-temperature fluids under extreme conditions.

Dimensional tolerance:
Pipe types Outer-caliber(D) Thickness(S)
  Pipe outer-caliber(mm) Allowable warp(mm) Pipe thickness(mm) Allowable warp(mm)
Hot-rolled pipes ＞219～457 ±1.0％ ≤20 －10％,＋12.5％
＞20～40 －10％,＋10％
＞457～1066 ±0.9％ ＞40～70 －7％,＋9％
＞70～120 －6％,＋8％
Mechanical Properties:
Standards Steel pipes No. Tensile strength(MPa) Bend strength(MPa) Elongation(％) Impact energy(J) Hardness  
GB3087 10 335～475 ≥195 ≥24   /  
20 410～550 ≥245 ≥20   /  
GB5310 20G 410～550 ≥245 ≥24 ≥35 /  
20MnG ≥415 ≥240 ≥22 ≥35 /  
25MnG ≥485 ≥275 ≥20 ≥35 /  
15CrMoG 440～640 ≥235 ≥21 ≥35 /  
12Cr2MoG 450～600 ≥280 ≥20 ≥35 /  
12Cr1MoVG 470～640 ≥255 ≥21 ≥35 /  
10Cr9Mo1VNb ≥585 ≥415 ≥20 ≥35 /  
ASME SA106 SA106B ≥415 ≥240 ≥22 ≥35 /  
SA106C ≥485 ≥275 ≥20 ≥35 /  
ASME SA333 SA333Ⅰ级 ≥380 ≥205 ≥28 －45≥18 /  
ASME SA335 SA335 P11 ≥415 ≥205 ≥22 ≥35 ≤163HB
SA335 P12 ≥415 ≥220 ≥22 ≥35 ≤163HB  
SA335 P22 ≥415 ≥205 ≥22 ≥35 ≤163HB  
SA335 P5 ≥415 ≥205 ≥22 ≥35 ≤187HB  
SA335 P91 585～760 ≥415 ≥20 ≥35 ≤250HB  
SA335 P92 ≥620 ≥440 ≥20 ≥35 250HB  
DIN17175 ST45.8/Ⅲ 410～530 ≥255 ≥21 ≥27(DVM) /  
15Mo3 450～600 ≥270 ≥22 ≥34(DVM) /  
13CrMo44 440～590 ≥290 ≥22 ≥34(DVM) /  
10CrMo910 480～630 ≥280 ≥20 ≥34(DVM) /  
EN10216-2 15NiCuMoNb5-6-4 (WB36) 610～780 ≥440 ≥19 ≥40 /  

Chemical composition:

Standards Steel pipes No. Chemical composition(%)
C Si Mn P S Cr Mo Cu Ni V Al W 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 0.17～0.25 0.17～0.37 0.70～1.00 ≤0.030 ≤0.030 ≤0.25 ≤0.15 ≤0.20 ≤0.25 ≤0.08        
25MnG 0.23～0.27 0.17～0.37 0.70～1.00 ≤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        
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 SA106 SA106B 0.17～0.25 ≥0.1 0.70～1.00 ≤0.030 ≤0.030                  
SA106C 0.23～0.27 ≥0.1 0.70～1.00 ≤0.030 ≤0.030                  
ASME SA333 SA333Ⅰ 0.09～0.12 / 0.7～1.00 ≤0.020 ≤0.010                  
SA333Ⅵ 0.09～0.12 ≥0.1 0.9～1.10 ≤0.020 ≤0.010                  
ASME SA335 SA335 P11 0.05～0.15 0.50～1.0 0.30～0.60 ≤0.030 ≤0.030 1.00～1.50 0.50～1.00              
SA335 P12 0.05～0.15 ≤0.50 0.30～0.61 ≤0.030 ≤0.030 0.80～1.25 0.44～0.65              
SA335 P22 0.05～0.15 ≤0.50 0.30～0.60 ≤0.030 ≤0.030 1.90～2.60 0.87～1.13              
SA335 P5 ≤0.15 ≤0.50 0.30～0.60 ≤0.030 ≤0.030 4.00/
6.00		 0.45/
0.65		              
SA335 P91 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
SA335 P92 0.07～0.13 ≤0.50 0.30～0.60 ≤0.020 ≤0.010 8.50～9.50 0.30～0.60 0.30～0.60 ≤0.40 0.15～0.25 ≤0.015 1.50～2.00 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 ≤0.30                
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      
EN1021 6-2 15NiCuMoNb5-6-4 (WB36) ≤0.17 0.25～0.50 0.80～1.20 ≤0.025 ≤0.020 ≤0.30 0.25～0.50 0.50～0.80 1.00～1.30   ≤0.05   0.015～0.045  

Chemical Composition and Mechanical Properties

The exceptional performance of 15CrMoG stems from its optimized chemical composition:

  • Carbon (C): 0.12-0.18% - Provides fundamental strength and hardness.
  • Chromium (Cr): 0.80-1.10% - Enhances oxidation and corrosion resistance at elevated temperatures.
  • Molybdenum (Mo): 0.40-0.55% - Improves high-temperature strength and creep resistance.
  • Other elements like Silicon (Si), Manganese (Mn), Phosphorus (P), and Sulfur (S) are controlled to ensure weldability, toughness, and purity.

 Mechanical Properties:

  • Tensile Strength: ≥440 MPa
  • Yield Strength: ≥295 MPa
  • Elongation: ≥22%
  • These properties ensure structural integrity under high internal pressures and mechanical loads.

Manufacturing Process

15CrMoG tubes are manufactured using a seamless process, typically hot extrusion or rotary piercing, followed by cold drawing to achieve precise dimensions and superior surface quality. Key steps include:

  • Smelting: Electric arc furnace refining with secondary refining (e.g., ladle furnace) ensures low impurity levels and homogeneous composition.
  • Heat Treatment: Normalizing (at ~900-960°C) and tempering (at ~680-730°C) optimize the microstructure, enhancing toughness and stress relief.
  • Testing: Each batch undergoes rigorous non-destructive testing (ultrasonic, eddy current) and hydrostatic tests to guarantee defect-free performance.

High-Temperature Performance and Microstructure

15CrMoG operates reliably in temperatures up to 550°C, owing to its stable microstructure and alloy design:

  • Creep Resistance: Molybdenum forms stable carbides, resisting deformation under prolonged stress and high temperatures.
  • Oxidation Resistance: Chromium forms a protective Cr₂O₃ layer, preventing scaling and degradation in steam environments.
  • Microstructure: The heat-treated structure consists of fine bainite or ferrite with pearlite, balancing strength and ductility.

Applications

15CrMoG is widely used in:

  • Superheaters and reheaters in coal-fired and biomass power plants.
  • High-pressure steam pipelines and headers in industrial boilers.
  • Heat exchangers and catalyst tubes in petrochemical industries.
  • Its durability reduces downtime and maintenance costs, making it a preferred choice for critical infrastructure.

15crmog High-Pressure Boiler Tube15crmog High-Pressure Boiler Tube15crmog High-Pressure Boiler Tube

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