ASTM A333 Grade 1/3/6/8 Low-Temperature Carbon & Alloy Steel Seamless Pipes

• Customization: Available
• Application: Chemical Industry, Construction Industry, Oil and Gas Industry, Water Treatment Plants, Industrial Cryogenic Tubing
• Certification: CE, ISO9001, JIS
• Model NO.: ASTM A333 Grade1/3/6/8 Low-Temperature Steel Pipes
• Elongation: as Per Products
• Length: Custom Length
• Outer Diameter: 1/8"–24" (DN6–DN600)
• Schedule: as Per Client′s Design
• tensile strength: ≥210
• Wall Thickness: Sch 10–sch 160
• Steel Grade: A333 Gr. 1/3/4/6/7/8/9
• Material: Carbon Steel
• Size: 1/8"–24" (DN6–DN600)
• Thickness: Sch 10–sch 160
• Shape: Round/Customized
• Process: Hot Rolled/Cold Drawn
• Tolerance: ±5%
• End: Plain End/Bevel End
• Usage: Heat Transfer
• Test: BV, SGS Is Available
• Processing: Customized
• Used: Factory, Decoration, Food
• Packing: Standard Export Packing
• Stock: Size Can Customized
• Delivery Time: 10-30 Working Days
• Transport Package: Woven Bag/Wooden Case
• Specification: Grade 1 (C-Mn), Grade 3 (Ni-Cu), Grade 6 (3.5% Ni)
• Trademark: EZS
• Origin: China
• Production Capacity: 10000 Ton/Year

Product Description

Product Description

1. Standard Compliance

• Primary Standard: ASTM A333 (Low-Temperature Seamless and Welded Steel Pipe).

• Complementary Standards:

  • ASME B36.10M (Dimensions and Weights).

  • NACE MR0175 (Sour Service Compatibility).

2. Dimensional Specifications

Parameter	Tolerance
OD Tolerance	±1% (Seamless) / ±0.75% (Welded)
Wall Thickness Tolerance	±12.5% (Minimum WT ≥87.5% Nominal)
Straightness	≤0.2% of Total Length

3. Performance Advantages

• Cryogenic Toughness: Grade 6 (3.5% Ni) achieves ≥18J Charpy Impact at -100°C.

• Sour Service Compliance: Grade 1/3/6 meet NACE MR0175 for H2S environments.

• Weldability: Pre-qualified for SMAW, GTAW, and SAW processes (AWS D1.1/D1.6).

4. Quality Assurance

• Chemical Composition

  Chemical Composition of ASTM A333
  Element	Grade 1, %	Grade 3, %	Grade 4, %	Grade 6, %	Grade 7, %	Grade 8, %	Grade 9, %	Grade 10, %	Grade 11, %
  C	0.30	0.19	0.12	0.30	0.19	0.13	0.20	0.20	0.10
  Mn	0.40-1.06	0.31-0.64	0.50-1.05	0.29-1.06	0.90	0.90	0.40-1.06	1.15-1.50	0.60
  P	0.025	0.025	0.025	0.025	0.025	0.025	0.025	0.035	0.025
  S	0.025	0.025	0.025	0.025	0.025	0.025	0.025	0.015	0.025
  Si	...	0.18-0.37	0.08-0.37	0.10 min	0.13-0.32	0.13-0.32	...	0.10-0.35	0.35
  Ni	...	3.18-3.82	0.47-0.98	0.40	2.03-2.57	8.40-9.60	1.60-2.24	0.25	35.0-37.0
  Cr	...	...	0.44-1.01	0.30	...	...	...	0.15	0.50
  Cu	...	...	0.40-0.75	0.40	...	...	0.75-1.25	0.15	...
  Al	...	...	0.04-0.30	...	...	...	...	0.06	...
  V	...	...	...	0.08	...	...	...	0.12	...
  Cb	...	...	...	0.02	...	...	...	0.05	...
  Mo	...	...	...	0.12	...	...	...	0.05	0.50
  Co	...	...	...	...	...	...	...	...	0.50

  
   

   

• Mechanical Tests:

  • Tensile Strength: ≥415 MPa (Grade 6).

  • Yield Strength: ≥240 MPa (Grade 6).

  • Elongation: ≥30% (50mm Gauge Length).

5. Application Scenarios

• LNG Facilities: Cryogenic piping for liquefied natural gas (-162°C).

• Chemical Plants: Ammonia, ethylene, and CO2 transport.

• Oil & Gas: Arctic pipeline systems (Grade 8 for -195°C).

6. Packaging and Delivery

• Anti-Corrosion: VCI (Volatile Corrosion Inhibitor) paper for marine shipments.

• Certification: EN 10204-3.1 Inspection Certificates + NDE Reports.

 

7.Grade Comparison Table

Grade	Key Alloy	Min. Temp	Key Application
Gr. 1	C-Mn	-45°C	Refrigeration systems
Gr. 3	Ni-Cu	-100°C	Low-temp chemical lines
Gr. 6	3.5% Ni	-100°C	LNG pipelines
Gr. 8	9% Ni	-195°C	Liquid nitrogen/O2 systems

Heat Treatment

• Grade 6: Normalized at 900-925°C for optimal grain refinement.

• Grade 8: Double Normalized & Tempered (NNT) for ultra-low temp stability.

 

 

Detailed Photos

 

 

 

Processing of Production