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SA106B Seamless Steel Pipe

Quality SA106B Seamless Steel Pipe factory
Quality SA106B Seamless Steel Pipe factory
Quality SA106B Seamless Steel Pipe factory
Quality SA106B Seamless Steel Pipe factory

SA106B Seamless Steel Pipe

Product Summary

SA106B Seamless Steel Pipe ASTM A106 Grade B seamless steel pipe is a cornerstone of high-temperature pressure conveyance systems across global industries. This article provides a detailed overview of its specification, chemical and mechanical properties, manufacturing process, key applications, and ...

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

SA106B Seamless Steel Pipe

ASTM A106 Grade B seamless steel pipe is a cornerstone of high-temperature pressure conveyance systems across global industries. This article provides a detailed overview of its specification, chemical and mechanical properties, manufacturing process, key applications, and the advantages that make it a preferred choice for critical service.

ASTM A106 is a standard specification from ASTM International (formerly the American Society for Testing and Materials) for seamless carbon steel pipe designed for high-temperature service. It is predominantly used in pipelines and pressure vessels where operating conditions involve elevated temperatures. The standard covers three grades: A, B, and C, with Grade B being the most commonly specified due to its optimal balance of strength, ductility, and cost-effectiveness. This pipe is intended for bending, flanging, and other coiling operations, making it exceptionally versatile.

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

The performance of A106B pipe is fundamentally dictated by its chemical composition, which is strictly controlled by the ASTM A106 standard. Key elements include:

  • Carbon (C): 0.30% max. Provides strength and hardness.
  • Manganese (Mn): 0.29 – 1.06%. Enhances strength and hardenability.
  • Phosphorus (P): 0.035% max. Impurity that reduces ductility and toughness.
  • Sulfur (S): 0.035% max. Impurity that causes brittleness.
  • Silicon (Si): 0.10% min. Adds strength and deoxidizes the steel.
  • The controlled low levels of impurities (S and P) and the balance of strengthening elements ensure reliable performance under stress and high heat.

Mechanical Properties

A106 Grade B pipe must meet minimum mechanical property requirements, which are verified through standardized testing:

  • Tensile Strength: 415 MPa (60,200 psi) minimum.
  • Yield Strength: 240 MPa (35,000 psi) minimum.
  • Elongation: The minimum elongation in 2 inches is a function of the pipe wall thickness but is typically around 20-30%, indicating good ductility and the ability to deform without fracturing.
  • These properties ensure the pipe can withstand the internal pressures and mechanical loads encountered in service.

Manufacturing Process

The "seamless" designation is crucial. These pipes are manufactured without a welded seam through a process that begins with a solid cylindrical steel billet. The billet is heated to a high temperature and then pierced through the center with a mandrel to create a hollow shell. This shell is subsequently elongated and rolled over a mandrel and stretched to achieve the desired diameter, wall thickness, and length. This homogeneous structure provides uniform strength around the entire circumference, eliminating the weak point that a weld seam can represent in high-pressure applications. The final pipes are then heat-treated (normalized) to refine the grain structure and enhance mechanical properties.

SA106B Seamless Steel Pipe 0SA106B Seamless Steel Pipe 1SA106B Seamless Steel Pipe 2

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