ASTM A268 Tp430 Stainless Steel Seamless Tube Ss Pipe

• Customization: Available
• Type: Seamless
• Technique: Cold Drawn
• Model NO.: EZS
• Material: Carbon Steel
• Surface Treatment: Oiled
• Usage: Pipeline Transport, Boiler Pipe, Hydraulic/Automobile Pipe, Food/Beverage/Dairy Products, Machinery Industry, Chemical Industry
• Section Shape: Round
• Wall Thickness: 1mm~20mm
• Length: Random
• Surface: Oil, Varnish
• Certificate: ISO, API, BV,CE
• Ddelivery Condition: Normalized, Normalized+Tempered
• Ends: Plain Ends or Bevel Ends with Caps
• Standard: ASTM A179,ASTM A192,ASTM A210,ASTM A213
• Shipment: Container or Bulk Vessel
• Transport Package: PVC Bags or Polywood Cases
• Specification: Diameter: 10mm~323mm
• Trademark: EZS
• Origin: China
• HS Code: 73043110
• Production Capacity: 200000t/Year

Product Description

Product Description

 

ASTM A268 TP430 seamless tubes:

1. Chemical Composition (Weight %)

Element	Composition (%)
Carbon (C)	≤ 0.12
Manganese (Mn)	≤ 1.00
Phosphorus (P)	≤ 0.040
Sulfur (S)	≤ 0.030
Silicon (Si)	≤ 1.00
Chromium (Cr)	16.0 - 18.0
Nickel (Ni)	≤ 0.75 (optional)
Iron (Fe)	Balance

2. Mechanical Properties

Property	Requirement
Tensile Strength (MPa)	≥ 450
Yield Strength (MPa)	≥ 205
Elongation (% in 50 mm)	≥ 22
Hardness (Rockwell B)	≤ 89

3. Manufacturing Process

• Seamless tubes are produced via hot or cold working processes followed by heat treatment (annealing) to meet mechanical properties.

• Welded tubes (covered under A268 but not applicable to seamless) require proper heat treatment after welding.

4. Heat Treatment

• Annealing is required at temperatures sufficient to dissolve carbides and ensure corrosion resistance (typically 815-900°C (1500-1650°F) followed by rapid cooling or air cooling).

5. Testing Requirements

• Hydrostatic or Nondestructive Electric Test (NDE) - Each tube must be tested.

• Flattening, Flaring, or Reverse Flattening Test - Required for welded tubes (not mandatory for seamless unless specified).

• Hardness, Tensile, and Corrosion Tests - As per buyer's requirements.

6. Dimensions & Tolerances

• Outside Diameter (OD) & Wall Thickness - Must conform to ASTM A268 dimensional standards (e.g., ASME B36.19M for stainless steel tubes).

• Length - Typically supplied in random or fixed lengths as agreed upon.

7. Corrosion Resistance

• TP430 offers good resistance to:

  • organic acids, and mild corrosive environments.

  • Poor resistance to chloride-induced stress corrosion cracking (compared to austenitic grades like 304/316).

8. Common Applications

• Automotive exhaust systems

• Heat exchangers

• Decorative and architectural applications

• Food processing equipment

9. Equivalent Grades

Standard	Equivalent Grade
UNS	S43000
EN (Europe)	1.4016 (X6Cr17)
JIS (Japan)	SUS430

Inspection items:
1. Chemical Composition
2. Mechanical Properties
3. Hardness
4. Impact Test
5. Flattening Test
6. Bending Test
7. Flaring Test
8. Flange Test
9. Drift Test
10. Hydrostatic Test
11. Eddy Current Test
12. Ultrasonic Test
13. M. P. I.
14. L. M. T.
15. Size
16. Surface Quality
17. Decarburizing Layer Depth
18. Micro Structure
19. Grain Size Analysis
20. Intercrystalline Corrosion
21. Stabilization Heat Treatment.
22. Erosion Test