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 - Zorun Steel supplies premium-grade Low Temperature Carbon Steel Pipe (LTCS ASTM A333 Gr 6) designed specifically for subzero and cryogenic service environments.

These pipes are ideal for oil refineries, LNG plants, petrochemical installations, and gas transmission lines where impact resistance and ductility at low temperatures are critical.

As a trusted manufacturer and exporter, we offer a full range of ASTM A333 and ASME SA333 Gr.

6 pipes in seamless form, with sizes ranging from small-diameter precision tubes to large-diameter heavy-wall applications.

Our LTCS ASTM A333 Gr 6 pipes meet or exceed the stringent requirements of ASME, ASTM, and international standards for mechanical integrity, pressure ratings, and low-temperature performance.

Company Contact:

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

• Phone: 13931757888

• Address: Hope New District of Mengcun County, 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