ASTM A333 Grade 8 Low-Temperature Seamless Steel Pipe

ASTM A333 Grade 8 Low-Temperature Seamless and Welded Steel Pipe

ASTM A333 Grade 8 steel pipe for Seamless and Welded Steel Pipe for Low-Temperature Service and Other Applications with Required Notch Toughness.The pipe shall be made by the seamless or welding process with the addition of no filler metal in the welding operation.

ASTM A333 Grade 8 Low-Temperature Seamless and Welded Steel Pipe Quick Details

Company Name: beite steel pipe

Country/Region: China

Product Name：ASTM A333 Grade 8 Steel Pipe

FOB Price: US $1300-2600 / Ton | 1 Ton/Tons (Min. Order)

Port of Shipment：Tianjin,China

Payment：L/C or T/T

Delivery: 7-15 days after payment

Package：Standard export package,suit for all kinds of transport, or as required.

ASTM A333 Grade 8  Steel Pipe Dimensional Range & Specification

Outside Diameter：20 – 215mm

Wall thickness：2mm——15mm

Length：6000mm、12000m or specified length as required. 

Heat Treatment:

ASTM A333 Grade 8 pipe shall be heat treated by the manufacturer by either of the following methods:

Quenched and Tempered—Heat to a uniform tem-perature of 1475 ± 25°F [800±15°C]; hold at this tempera-ture for a minimum time in the ratio of 1 h/in. [2 min/mm] of thickness, but in no case less than 15 min; quench by immersion in circulating water. Reheat until the pipe attains a uniform temperature within the range from 1050 to 1125°F[565 to 605°C]; hold at this temperature for a minimum time in the ratio of 1 h/in. [2 min/mm] of thickness, but in no case less than 15 min;cool in air or water quench at a rate no less than 300°F [165°C]/h.

Double Normalized and Tempered—Heat to a uni-form temperature of 1650 ± 25°F [900 ±15°C]; hold at this temperature for a minimum time in the ratio of 1 h/in. [2min/mm] of thickness, but in no case less than 15 min; cool in air. Reheat until the pipe attains a uniform temperature of 1450 ±25°F [790 ± 15°C]; hold at this temperature for a minimum time in the ratio of 1 h/in. [2 min/mm] of thickness, but in no case less than 15 min; cool in air. Reheat to a uniform temperature within the range from 1050 to 1125°F [565 to 605°C]; hold at this temperature for a minimum time of 1 h/in.[2 min/mm] of thickness but in no case less than 15 min; cool in air or water quench at a rate not less than 300°F [165°C]/h.
Chemical Composition(%) & Physical Properties of ASTM A333 Grade 8 Steel Pipe

ASTM A333 Grade 8 Steel Pipe Chemical Composition(%)

Mechanical Properties
Tensile Requirements

B The following table gives the calculated minimum values.

C Calculated elongation requirements shall be rounded to the nearest whole number.

Note:The preceding table gives the computed minimum elongation values for each 1⁄32in. [0.80mm] decrease in wall thickness. Where the wall thickness lies between two values shown above, the minimum elongation value is determined by the following equation:
 

Impact Requirements

For ASTM A333 Grade 8 each of the notched bar impact specimens shall display a lateral expansion opposite the notch of not less than 0.015 in. [0.38 mm].

When the average lateral expansion value for the three impact specimens equals or exceeds 0.015 in. [0.38 mm] and the value for one specimen is below 0.015 in. [0.38 mm] but not below 0.010 in. [0.25 mm], a retest of three additional specimens may be made. The lateral expansion of each of the retest specimens must equal or exceed 0.015 in. [0.38 mm].

Lateral expansion values shall be determined by the procedure in Test Methods and Definitions A 370.

The values of absorbed energy in foot-pounds and the fracture appearance in percentage shear shall be recorded for information. A record of these values shall be retained for a period of at least 2 years.

Workmanship, Finish and Appearance

1.The pipe manufacturer shall explore a sufficient num- ber of visual surface imperfections to provide reasonable assurance that they have been properly evaluated with respect to depth. 
2.Surface imperfections that penetrate more than 12½ % of the nominal wall thickness or encroach on the minimum wall thickness shall be considered defects. 

3.The pipe manufacturer shall remove by grinding the following:

Mechanical marks, abrasions and pits, any of which imperfections are deeper than 1⁄16 in. [1.6 mm], and

Visual imperfections commonly referred to as scabs, seams, laps, tears, or slivers found by exploration
4.When imperfections or defects are removed by grind- ing, a smooth curved surface shall be maintained, and the wall thickness shall not be decreased below that permitted by this specification. The outside diameter at the point of grinding may be reduced by the amount so removed.
5.The finished pipe shall be reasonably straight.
Mechanical Testing

Sampling—For mechanical testing

1.Transverse or Longitudinal Tensile Test and Flattening Test

2..Hydrostatic Test—Each length of pipe shall be sub- jected to the hydrostatic test.

3.Impact Test

Impact Tests (Welded Pipe)

Impact Test

Except when the size of the finished pipe is insufficient to permit obtaining subsize impact specimens, all material furnished to this specification and shall be tested for impact resistance at the minimum temperature for the respective grades

ASTM A333 Grade 8 Steel Pipe Impact temperature

Hydrostatic or Nondestructive Electric Test

Product Marking

Except as modified in 16.1.1, in addition to the marking prescribed in Specification A 999/A 999M, the mark- ing shall include whether hot finished, cold drawn, seamless or welded, the schedule number and the letters “LT” followed by the temperature at which the impact tests were made, except when a lower test temperature is required because of reduced specimen size, in which case, the higher impact test tempera- ture applicable to a full-size specimen should be marked.

Types of Packaging:

- Bundles (hexagonal)

- Wooden Boxes

- Crates (steel/wooden)

- Special crates for U-Bend tubes with each radius separated

- Our ASTM A333 Grade 8 Alloy Steel Pipe packing can meet any needs of the customers.

Delivery: 7-15 days after payment