As a prominent supplier, Excellent Overseas is responsible for delivering unparalleled quality in ASTM A335 P12 Alloy Steel Seamless Pipe Suppliers from leading Manufacturers like Tubes, MSL, Seah, Hyundai, ArcelorMittal and NSSMC.

Table of Content

1. Supply Range & Dimensions

Seamless Pipe Size1/2" NB to 24" NB
Outside Diameter21.3 mm – 609.6 mm
Pipe Schedule (WT)SCH-10 to SCH-XXS Upto 80 MM
Pipe LengthSRL, DRL, 20 Ft, 40 Ft, Cut Length
Pipe TypesHot Finished Seamless, Cold Drawn Seamless
Pipe EndsPlain End (PE), Bevel End (BE)
Delivery ConditionsAnnealed, Normalized & Tempered
Specification LevelASTM A335 / ASME SA335
Equivalent GradesEN 10216-2 13CrMo4-5, ASTM A213 T12
Surface FinishNatural, Bare, Oiled, Mill Varnish
FormRound Pipe Only
End Protection CapsPlastic Caps or Iron Protectors
CertificationsComplete Traceability EN 10204 3.1, 3.2, IBR Certified

2. Manufacturers in Stock

Hyundai Hysco
Hyundai Hysco
Valcovny Trub
Valcovny Trub
Benteler
Benteler Make
SEAH Korea
SEAH Korea
Butting
Butting Make
JFE
JFE Make
Arcelormittal
ArcelorMittal
Tenaris
Tenaris Steel
MSL
MSL Make
Nippon Steel
Nippon Steel
Tubular Canada
Tubular Canada
Tubos
Tubos API

3. Chemical Components

ASTM A335 P12 is a low-alloy ferritic steel containing chromium and molybdenum as its principal alloying elements.

Grade Carbon Manganese Phosphorus Sulfur Silicon Chromium Molybdenum
ASTM A335 P12 0.05 - 0.15 0.30 - 0.61 0.025 max 0.025 max 0.50 max 0.80 - 1.25 0.44 - 0.65

4. Mechanical Properties

Property Requirement
Tensile Strength, min. 60 ksi [415 MPa]
Yield Strength, min. 32 ksi [220 MPa]
Elongation in 2 in. or 50 mm, min. 30% Longitudinal / 20% Transverse
Elongation for 4D specimen, min. 22% Longitudinal / 14% Transverse

5. Hardness Requirement

Grade Brinell Vickers Rockwell
P12 ≤ 217 HBW ≤ 217 HV ≤ 95 HRB

6. ASTM A335 P12 Comparable Grades

The following grades are commonly considered comparable to ASTM A335 P12. They should not be treated as automatically interchangeable without confirming the applicable specification and requirements.

Standard Grade
ASME SA335 P12
ASTM A213 T12
JIS G3462 STPA22
EN 10216-2 13CrMo4-5
GB/T 5310 15CrMoG

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7. Heat Treatment

ASTM A335 P12 seamless steel pipe shall be heat-treated in accordance with the requirements of ASTM A335.

Grade Heat Treatment Tempering Temperature, min.
ASTM A335 P12 Full or Isothermal Annealing —
Normalizing and Tempering 1200°F [650°C]

8. A335 Grade P12 Alloy Steel Seamless Pipe Tolerances

NPS Outside Diameter Tolerance Wall Thickness Tolerance
1/8 ≤ NPS ≤ 1 1/2 ±0.40 mm +20%, −12.5%
1 1/2 < NPS ≤ 4 ±0.79 mm +20%, −12.5%
4 < NPS ≤ 8 +1.59 / −0.79 mm +22.5%, −12.5%*
8 < NPS ≤ 12 +2.38 / −0.79 mm +15%, −12.5%*

* Wall-thickness tolerance depends on the applicable outside-diameter-to-wall-thickness ratio.
(T = Specified Wall Thickness; D = Specified Outside Diameter)

9. Inspection & Testing Standards for ASTM A335 P12 Pipes

Inspection / Test Applicable Standard
Visual InspectionASTM A335 / ASTM A530
Dimensional InspectionASTM A999
Chemical Composition AnalysisASTM A335
Tensile TestASTM A370
Hardness TestASTM A370 / ASTM A335
Ultrasonic TestingASTM E213
Magnetic Particle Testing (MPI)ASTM E709
Radiographic TestingASTM E94
Hydrostatic TestingASTM A999 / ASTM A335
Heat Treatment VerificationASTM A335

10. Delivery Conditions & More

Standard Delivery Condition Grade
ASTM A335 Full Anneal, Isothermal Anneal, or Normalized & Tempered P12
ASME SA335 Full Anneal, Isothermal Anneal, or Normalized & Tempered P12

11. Process of Manufacturing

Alloy Steel Seamless Pipe Manufacturing Process - Excellent Overseas

12. Countries We Export To