Stainless Steel 425 ERW pipes and tubes are high strength chromium steel tubulars supplied under UNS S42500 for oilfield and subsurface service. For sour service under NACE MR0175 / ISO 15156, the tubing is supplied as Grade 80, quenched and double tempered, with a minimum yield strength of 552 MPa (80 ksi) and a maximum hardness of 22 HRC. Amardeep Steel Centre supplies these tubes from India to energy sector and export customers against a confirmed project specification. See also our SS welded pipes and tubes and SS seamless pipes and tubes.
Technical Data
Specifications of SS 425 ERW Pipes and Tubes
Specification Parameter | Technical Detail |
|---|---|
Material Grade | SS 425 / Type 425 |
UNS Number | UNS S42500 |
Classification | Martensitic stainless steel, quenched and double tempered (Grade 80 sour service condition) |
Manufacturing Process | Electric Resistance Welded (ERW), to the confirmed project specification |
Form Factor | Round Pipes, Square/Rectangular Tubing, Custom Hollow Sections |
Certification | EN 10204 3.1 / 3.2. Hardness and SSC test reports to NACE MR0175 / ISO 15156 on request |
Testing | Hydrostatic, NDT (Eddy Current/Ultrasonic), PMI, Mechanical |
Chemical Compositions of Stainless Steel 425 ERW Pipes and Tubes
Chemical Element | Weight Percentage (% Mass) |
|---|---|
Carbon (C) | 0.03 max |
Manganese (Mn) | 0.50 max |
Silicon (Si) | 0.50 max |
Chromium (Cr) | 12.00 to 13.00 |
Nickel (Ni) | 4.50 to 5.50 |
Molybdenum (Mo) | 1.50 to 2.00 |
Copper (Cu) | 1.50 to 2.50 |
Iron (Fe) | Balance |
SS 425 ERW Pipes and Tubes Mechanical Properties
Mechanical Property | Grade 80 Sour Service Value |
|---|---|
Tensile Strength (Ultimate) | Per mill specification, stated on the MTC |
Yield Strength (0.2% Offset) | 552 MPa (80 ksi) minimum |
Hardness (Rockwell C) | 22 HRC maximum |
Thermal Condition | Quenched and double tempered |
Dimensions Chart of SS 425 ERW Pipes and Tubes
Dimensional Parameter | Manufacturing Capability & Supply Specification |
|---|---|
Nominal Pipe Size Range (NPS / NB) | 1/8" to 6" NB (Covering Schedules 5S, 10S, 40S, 80S, and 160) |
Outer Diameter (OD) | Supplied per customer specification (custom sizes available upon request) |
Wall Thickness (WT) | Supplied per customer specification (in mm or SWG) |
Standard Lengths | 6.0 Meters, 12.0 Meters, or Precision Cut-to-Length Parts |
Surface Finish Options | Mill Finish (2B), Bright Annealed (BA), Exterior Polished (180/320 Grit) |
Inquiry Requirements | Please specify exact Outer Diameter (OD), Wall Thickness, Length, and Quantity |
Stainless Steel 425 ERW Pressure Rating Chart
Parameter | Specification & Engineering Status |
|---|---|
Alloy Family | AISI 425 / 425 Mod (Martensitic Stainless Steel) |
ASME / BPVC Code Status | Not listed for allowable stress design in ASME BPVC Section II Part D or ASME B31.3 |
Design Pressure Ratings | Unrated (Design pressure values require project-specific engineering verification) |
Primary Recommended Uses | Cutlery, wear-resistant components, knife blades, and specialized mechanical tubing |
Pressure Piping Recommendation | For ASME-compliant pressure piping, specify approved grades (e.g., 304L, 316L, 410, or 439) |
Applications and Industrial Uses of Stainless Steel 425 ERW Pipes and tubes
- Oil and Gas Production Tubing
- Sour-Service Oilfield Tubing
- Downhole Production Equipment
- Oilfield Well Components
- Hydrocarbon Processing Systems
- High-Pressure Tubular Components
Frequently Asked Questions
What are Stainless Steel 425 ERW Pipes and Tubes?
Stainless Steel 425 ERW Pipes and Tubes are welded tubular products made from UNS S42500 stainless steel for specialized high-strength and oilfield applications.
What is UNS S42500 Stainless Steel used for?
UNS S42500 is mainly used for oilfield tubing, casing, and downhole tubular components where strength and sour-service resistance are required.
Is Stainless Steel 425 suitable for oil and gas applications?
Yes. UNS S42500 can be used in oil and gas production environments when the applicable NACE MR0175 / ISO 15156 service conditions are met.
What are the NACE MR0175 requirements for UNS S42500 tubing?
For sour service, Stainless Steel 425 tubing is supplied as Grade 80, quenched and double tempered, with a minimum yield strength of 552 MPa (80 ksi) and a maximum hardness of 22 HRC. Confirm the exact requirements against the current NACE MR0175 / ISO 15156 table for your environment.
What is the yield strength of Stainless Steel 425 tubing?
For the Grade 80 condition, the specified minimum yield strength is 552 MPa (80 ksi).
Can Stainless Steel 425 ERW Pipes be used for downhole applications?
Yes. UNS S42500 is specifically listed for downhole tubing and casing applications under defined sour-service conditions. Suitability for downhole use depends on the well environment, the NACE MR0175 / ISO 15156 limits for the grade and condition, and the project specification. Send the well conditions with your enquiry.
What is the chromium content of UNS S42500?
UNS S42500 is a 15% chromium tubular grade; NACE material tables specify approximately 14-16% chromium. Chromium content is stated on the mill test certificate for each heat. See the chemical composition table on this page.
Are Stainless Steel 425 ERW Pipes available in customized sizes?
Yes. ERW pipes and tubes can be manufactured in customized dimensions, subject to available feedstock, manufacturing capability, and project requirements.
