1. Outer Diameter (OD): 48mm~720mm
  2. Wall Thickness (WT): 4mm~58mm
  3. Length: 5m-12m or as required
  4. Application: Specifically designed for high-temperature service, serving as an alloy steel pipe and boiler tube.
  5. Additional Technology: Inclusive of hot rolling, cold drawing, heat treatment, bending, and annealing. End options include plain, beveled, or threaded.
  6. Surface: Options for surface finish include black paint, PE coating, galvanization, and polishing.
  7. Delivery Condition: Available in both Hot Rolled and Cold Drawn states.
  8. Steel Grade: Comprising P1, P2, P5, P9, P11, P12, P22, P23, P91, and P92.

CG Steel produces a comprehensive range of ASTM A335 alloy steel pipes, featuring main grades including P11, P12, P22, and P9. Designed for high temperatures up to 610ºC, pipes under this specification serve as main steam pipes in power plants, as well as superheaters and reheaters due to their heat-resistant properties and excellent processing performance.

The ASTM A335 specification encompasses nominal wall and minimum wall seamless ferritic alloy-steel pipes tailored for high-temperature service. Pipes and tubes conforming to this specification are suitable for bending, flanging, and similar forming operations, as well as fusion welding.

ASTM A335 Chemical Composition:

ASTM A335 Steel GradeC, %Mn, %P, %S, %Si, %Cr, %Mo, %
ASTM A335 P10.05-0.150.30-0.600.025 max0.025 max0.50-1.001.00-1.500.44-0.65
ASTM A335 P20.10-0.200.30-0.610.025 max0.025 max0.10-0.300.50-0.810.44-0.65
ASTM A335 P50.15 max0.30-0.600.025 max0.025 max0.50 max4.00-6.000.45-0.65
ASTM A335 P90.15 max0.30-0.600.025 max0.025 max0.25-1.008.0-10.00.90-1.10
ASTM A335 P110.05-0.150.30-0.600.025 max0.025 max0.50-1.001.00-1.500.44-0.65
ASTM A335 P120.05-0.150.30-0.610.025 max0.025 max0.50 max0.80-1.250.44-0.65
ASTM A335 P220.05-0.150.30-0.600.025 max0.025 max0.50 max1.90-2.600.87-1.13
Steel GradeC, %Mn, %P, %S, %Si, %Cr, %Mo, %V, %Nb, %B,%N, %Al, %Ni,%W, %
ASTM A335 P230.04-0.100.1-0.60.03 max0.01 max0.5 max1.9-2.60.05-0.300.20-0.300.02-0.080.0005-0.0060.03 max0.03 max-1.45-1.75
ASTM A335 P910.08-0.120.3-0.60.02 max0.01 max0.2-0.58.0-9.50.85-1.050.18-0.250.06-0.10-0.03-0.070.04 max0.4 max-
ASTM A335 P920.07-0.130.3-0.60.02 max0.01 max0.5 max8.5-9.50.3-0.60.15-0.250.04-0.090.001-0.0060.03-0.070.04 max0.4 max1.5-2.0

ASTM A335 Mechanical Property:

Steel GradeTensile Strength, MPaYield Strength, MPaElongation, %Hardness, HB
ASTM A335 P1415 min205 min30 min 
ASTM A335 P2380 min205 min30 min 
ASTM A335 P5415 min205 min30 min 
ASTM A335 P9415 min205 min30 min 
ASTM A335 P11415 min205 min30 min 
ASTM A335 P12415 min220 min30 min 
ASTM A335 P22415 min205 min30 min 
ASTM A335 P23510 min400 min20 min 
ASTM A335 P91585 min415 min20 min250 max
ASTM A335 P92620 min440 min20 min250 max

ASTM A335 Equivalent steel grade:

Steel gradeENASTMASMEGOSTNBR
ASTM A335EN10216-2ASTM A213ASME SA213550-755603

CG Steel provides access to ASTM A335 steel tubes, available either from our stock or sourced from reputable steel mills. Additionally, our steel fabrication service ensures that steel plates undergo various processes, including cutting, welding, bending, machining, pre-coating, pre-lining, beveling, or customization according to your specifications. Our steel mills boast skilled fabricating personnel with 5-10 years of experience. For those interested in acquiring ASTM A335 steel tube products, please feel free to reach out to us for the latest pricing. Alternatively, refer to the table below for the equivalent steel grades of ASTM A335.

Nominal wall thickness for ASTM A335(Seamless and welded steel pipes)

ASTM A450Hot rolledOutside Diameter, mmTolerance, %
OD≤101.6, WT≤2.4+40/-0
OD≤101.6, 2.4＜WT≤3.8+35/-0
OD≤101.6, 3.8＜WT≤4.6+33/-0
OD≤101.6, WT>4.6+28/-0
OD>101.6, 2.4＜WT≤3.8+35/-0
OD>101.6, 3.8＜WT≤4.6+33/-0
OD>101.6, WT>4.6+28/-0
Cold DrawnOutside Diameter, mmTolerance, %
OD≤38.1+20/-0
OD>38.1+22/-0
ASTM A530NPSOutside Diameter, inchTolerance, %
1/8≤OD≤2-1/2+20.0/-12.5
3≤OD≤18, WT/OD≤5%+22.5/-12.5
3≤OD≤18, WT/OD>5%+15.0/-12.5
OD≥20, WT/OD≤5%+22.5/-12.5
OD≥20, WT/OD>5%+15.0/-12.5

Outside Diameter and Tolerance For ASTM A335 Steel Pipe

ASTM A450Hot rolledOutside Diameter, mmTolerance, %
OD≤101.6+0.4/-0.8
101.6＜OD≤190.5+0.4/-1.2
190.5＜OD≤228.6+0.4/-1.6
Cold DrawnOutside Diameter, mmTolerance, mm
OD＜25.4±0.10
25.4≤OD≤38.1±0.15
38.1＜OD＜50.8±0.20
50.8≤OD＜63.5±0.25
63.5≤OD＜76.2±0.30
76.2≤OD≤101.6±0.38
101.6＜OD≤190.5+0.38/-0.64
190.5＜OD≤228.6+0.38/-1.14
ASTM A530 & ASTM A335NPSOutside Diameter, inchTolerance, mm
1/8≤OD≤1-1/2±0.40
1-1/2＜OD≤4±0.79
4＜OD≤8+1.59/-0.79
8＜OD≤12+2.38/-0.79
OD>12±1%