Astm A333 Grade 4 Seamless Pipe
ASTM A333 Grade 4 seamless or welded carbon/alloy steel pipe engineered for low-temperature service. Designed with controlled microstructure and enhanced alloying elements to ensure reliable strength, toughness, and impact resistance in cold-service pipeline applications.
Standard & Grade
- Standard: ASTM A333
- Grade: Grade 4
- Product type: Seamless or welded carbon/alloy steel pipe
- Designed for low-temperature service
Manufacturing
- Manufactured by seamless or welded process
- No filler metal used in welded construction (as specified)
- Heat treated to control microstructure
Dimensions
- Outside diameter: 19.05 mm – 114.3 mm
- Wall thickness: 2.0 mm – 14 mm
- Maximum length: 16000 mm
Applications
- Low-temperature service pipelines
- Seamless and welded steel piping systems
Inspection & Testing
- Chemical composition inspection
- Mechanical tests: tensile strength, yield strength, elongation
- Flaring, flattening, bending, and hardness tests
- Impact testing for low-temperature performance
- Surface and dimensional inspection
- Non-destructive electric testing
- Hydrostatic test
Chemical Composition (%)
- Carbon (max): 0.12
- Manganese: 0.50 – 1.05
- Phosphorus (max): 0.025
- Sulfur (max): 0.025
- Silicon: 0.18 – 0.37
- Nickel: 3.18 – 3.82
- Chromium: 0.44 – 1.01
- Aluminium (Al): 0.04 – 0.30
Surface Treatment
- Oil dip
- Varnish
- Passivation
- Phosphating
- Shot blasting
Packing & Marking
- Bare packing, bundle packing, or crate packing
- Wooden protection at both ends of pipes
- Sea-worthy export packing as requested
- Each crate marked with order number, heat number, dimensions, weight, and bundle details