Main location

Shanghai, China

Send email to us by

sales@sunnysteel.com

Know-how and best quality

tel:+8621 3378 0199

ASTM A333 alloy pipes

ASTM A333 (ASME S/A-333) Pipe grades permit low temperature service.

This specification covers nominal (average) walled pipe almost exclusively in seamless.


Low Temperature Steel Pipe Specifications & Grades

  • SA333 & A333 – Grades 1, 3, 6 & 8
  • A671 CC65 CL22 EFW at -50°F (Welded Alternative to A333)
  • Flanges: A/SA 350 LF2, LF3
  • Fittings: A/SA-420 WPL6, WPL3

Size range

  • 1/4” Nominal to 24”O.D.
  • Wall Thickness – Schedule 10 through XXH
  • Unscheduled heavy wall pipe thicknesses available up to 4 inches.

For low temperature

Production specification range of low temperature pipe products

Pipes are used in low temperature service
Steel pipes are produced accord to ASTM A333 standard

Strike temperature condition:

Crade The lowest temperature for strike test
ASTM A333 Grade 1 -50 -45
ASTM A333 Grade 6 -50 -45

Chemical Composition (%) of ASTM A333 steel pipe

Grade Tensile Strength (MPa) Yield Point (MPa) Elongation (%)
Y X
Grade 1 ≥380 ≥205 ≥35 ≥25
Grade 3 ≥450 ≥240 ≥30 ≥20
Grade 4 ≥415 ≥240 ≥30 ≥16.5
Grade 6 ≥415 ≥240 ≥30 ≥16.5
Grade 7 ≥450 ≥240 ≥30 ≥22
Grade 8 ≥690 ≥515 ≥22
Grade 9 ≥435 ≥315 ≥28
Grade 10 ≥550 ≥450 ≥22
Grade 11 ≥450 ≥240 ≥18

Mechanical requiremnts of ASTM A333 alloy pipe

Grade Chemical Composition (%)
C Si Mn P S Cr Ni Cu Mo V Al
Grade 1 ≤0.30 0.40-1.06 ≤0.025 ≤0.025
Grade 3 ≤0.19 0.18-0.37 0.31-0.64 ≤0.025 ≤0.025 3.18-3.82
Grade 4 ≤0.12 0.18-0.37 0.50-1.05 ≤0.025 ≤0.025 0.44-1.01 0.47-0.98 0.40-0.75 0.04-0.30
Grade 6 ≤0.30 ≥0.10 0.29-1.06 ≤0.025 ≤0.025
Grade 7 ≤0.19 0.13-0.32 ≤0.90 ≤0.025 ≤0.025 2.03-2.57
Grade 8 ≤0.13 0.13-0.32 ≤0.90 ≤0.025 ≤0.025 8.40-9.60
Grade 9 ≤0.20 0.40-1.06 ≤0.025 ≤0.025 1.60-2.24 0.75-1.25
Grade 10 ≤0.20 0.10-0.35 1.15-1.50 ≤0.03 ≤0.015 ≤0.15 ≤0.25 ≤0.015 ≤0.50 ≤0.12 ≤0.06
Grade 11 ≤0.10 ≤0.35 ≤0.6 ≤0.025 ≤0.025 ≤0.50 35.0-37.0 ≤0.50

Heat Treatment:

Grades 1 and 6 shall be heat treated to control their microstructure.

ASTM A333 Grade 6 and ASME SA 333 Grade 6 are heat treated to achieve normalized condition @ 920 degrees Celsius with controlled microstructure.

Production specification range of low temperature pipe products

Specific Impact requirements

No.
Order No.
Size description
O.D.
/mm
W.T.
/mm
Legnth
/m
1
A333 Gr.6
A333 Gr.6/X42NS
10-127
1-20
6-12.0
42-114.3
3.5-6
6-12.2
42-114.3
6-12
6-12.2
114.3-180
3.8-8
6-12.2
114.3-180
8-22
6-12.2
68-180
10-14
6-12.2
69-254
14-55
6-12.2
140-340
6-8
6-12.2
140-368
8-42
6-12.2
318-720
14-50
4-12.5
2
A333 Gr.6/X52QS
42-114.3
3.5-12
6-12.2
114.3-180
3.8-22
6-12.2
68-254
10-40
6-12.2
140-368
6-40
6-12.2
318-720
14-40
4-12.5
140-368
6-25
6-12.2
318-720
14-25
4-12.5
3
16MnDG
10-127
1-20
6-12.0
42-114.3
3.5-12
6-12.2
114.3-180
3.8-22
6-12.2
68-254
10-55
6-12.2
140-368
6-42
6-12.2
318-720
14-120
4-12.5

Specific Impact requirements

The raw material used for low temperature service pipe is ALUMINIUM killed with high proportion of manganese (more than 1%) combined with low proportions of carbon (less than 0.23%).For low temperature pipe to be certified as LTCS additional impact test should be conducted at low temperatures, as per mandatory requirements in section 8 of ASTM A 333.