Asme Sa333 Sa333m Gr 6 - China

Basic performance

Chemical composition (typical values)

Carbon (C): ≤ 0.30%

Manganese (Mn): 0.291.06%

Silicon (Si): ≥ 0.10%

Nickel (Ni): Add a small amount (usually ≤ 0.50%) to improve low-temperature toughness.



Sulfur (S) and phosphorus (P): Strictly limit (≤ 0.025%) to ensure purity.

Mechanical properties

Tensile strength: ≥ 415 MPa (60 ksi)

Yield strength: ≥ 240 MPa (35 ksi)

Elongation rate: ≥ 30% (reflecting high ductility)

Low temperature impact toughness: Through the Charpy VNotch Test, it still meets the minimum impact energy requirement (usually ≥ 20 J) at 45 ° C.

heat treatment

Normalizing: A standard heat treatment process that refines grain size to improve low-temperature toughness.

Core advantages

Excellent low-temperature toughness: designed specifically for the temperature range of 45 ° C to 343 ° C to avoid low-temperature brittle fracture.



Good weldability: It can be processed through conventional welding methods such as TIG and MIG, and appropriate heat treatment is required after welding to eliminate residual stress.



Pressure resistance and sealing: suitable for medium and low pressure pipeline systems, meeting the safety requirements of pressure vessels and pipelines.

Main purpose

SA333 Gr.

6 is widely used in pipeline systems for low-temperature service environments, with typical scenarios including:

1 - Liquefied natural gas (LNG) facilities: low-temperature storage tanks, transmission pipelines.



2 - Refrigeration system: Transport of cryogenic media such as liquid nitrogen and liquid oxygen.



3 - Petrochemical industry: Process pipelines for low-temperature chemical fluids such as ethylene and propylene.



4 - Air separation equipment: Low temperature pipelines in oxygen and nitrogen production units.

Precautions for Processing and Construction

Welding process: Low hydrogen welding rods are required, and stress relief annealing is required after welding.



Cold bending processing: Avoid excessive cold deformation that may cause local embrittlement.



Inspection requirement: 100% non-destructive testing (UT or RT) is required to ensure that the weld seam is defect free.

Standard specifications

ASME standards: comply with ASME BPVC (Boiler and Pressure Vessel Code) and ASME B31.3 (Process Piping Code).



Size range: The outer diameter is usually 624 inches (DN150DN600), with wall thickness covering Sch 40 to Sch 160.

Company Contact:

• Posted By: Cangzhou Zongrun Pipe Industry Co.,ltd

• Phone: 13931757888

• Address: Hope New District of Mengcun County, Cangzhou City, Cangzhou , Hebei , China

• Email:

• Website: https://www.zorunsteelpipe.com/

• Business Description: Cangzhou Zongrun Pipe Industry Co., Ltd. is located in the Hope New District of Mengcun County, Cangzhou City, Hebei Province—recognized as the “Capital of Steel Pipes and Fittings in China.
  
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  The company operates two core business segments:
  
  Segment 1: Trading and distribution of seamless pipeline steel pipes
  
  Segment 2: Fabrication of steel structure products