USA Piping Solution has a consistent supply of Stainless Steel 420 Seamless Tubes for procurement teams, project engineers, and distributors in North America. ASTM A268 TP420 Seamless Tubes are produced from martensitic stainless steel with a higher carbon content than Type 410 and have the ability to attain a much greater hardness when heat treated. These UNS S42000 Seamless Tubes are completely welded and thus do not have a longitudinal weld seam, resulting in a tube that has uniform mechanical properties throughout the wall, which is superior in high pressure service. TP420 Seamless Tubes feature the excellent wear resistance properties of high carbon alloys with the corrosion resistance properties of chromium bearing stainless steels. The maximum hardness and wear resistance are obtained by oil quenching ASTM A268 TP420 Tube between 1800 degrees F and 1950 degrees F. In their annealed condition, these SS 420 Seamless Tubes are suitably ductile for forming operations. USA Piping Solution has stainless steel 420 seamless tubes for the oil and gas, pharmaceutical, surgical instrument, precision engineering and petrochemical sectors along with full documentation and quick delivery.
SS 420 Seamless Tubes Specifications
Specification | Details |
|---|---|
Standard | ASTM A268 / ASME SA268 |
Grade | TP420 / AISI 420 / SS 420 |
UNS No. | UNS S42000 |
DIN / EN No. | DIN 1.4021 / X20Cr13 |
Manufacture Process | Seamless (Cold Drawn / Hot Finished) |
Outside Diameter (OD) | 6.35 mm to 101.6 mm (1/4" to 4") |
Wall Thickness | 0.5 mm to 10 mm (BWG 22 to BWG 10) |
Length | Random Lengths (5.8 m to 7 m) or Fixed / Cut to Length |
End Condition | Plain / Beveled / Threaded |
Surface Finish | Bright Annealed (BA) / Annealed and Pickled / Polished |
Hardness (Annealed) | Max 97 HRB |
Testing | Hydrostatic, Eddy Current, Ultrasonic (UT), PMI, Flattening, Flaring |
Documentation | EN 10204 3.1 MTCs, NABL Lab Reports, Third Party Inspection |
Types of SS 420 Seamless Tubes
- SS 420 Seamless Round Tubes
- SS 420 Cold Drawn Seamless Tubes
- SS 420 Hot Finished Seamless Tubes
- ASTM A268 TP420 Bright Annealed Seamless Tubes
- UNS S42000 Seamless Instrumentation Tubes
- TP420 Seamless Capillary Tubes
- SS 420 Seamless U-Bend Tubes
- SS 420 Seamless Hydraulic Tubes
- SS 420 Seamless Square Tubes
- Stainless Steel 420 Seamless Rectangular Tubes
SS 420 Seamless Tubes to ASTM A268 TP420 — OD 6.35 mm to 101.6 mm, cold drawn and bright annealed, EN 10204 3.1 certified.
Contact USA Piping Solution for pricing and fast delivery.
Request PricingChemical Composition of ASTM A268 TP420 Seamless Tubes
Element | Min (%) | Max (%) |
|---|---|---|
Carbon (C) | 0.15 | — |
Manganese (Mn) | — | 1.00 |
Phosphorus (P) | — | 0.040 |
Sulfur (S) | — | 0.030 |
Silicon (Si) | — | 1.00 |
Chromium (Cr) | 12.00 | 14.00 |
Nickel (Ni) | — | — |
Iron (Fe) | Balance | Balance |
Mechanical Properties of SS 420 Seamless Tubes
Property | Annealed Condition | Hardened and Tempered |
|---|---|---|
Tensile Strength (min) | 620 MPa (90 ksi) | Up to 1720 MPa (250 ksi) |
Yield Strength 0.2% Proof (min) | 450 MPa (65 ksi) | Up to 1550 MPa (225 ksi) |
Elongation in 50 mm (min) | 15% | 8% |
Hardness (max) | 97 HRB / 241 HBW | 50 HRC (minimum after hardening) |
Modulus of Elasticity | 200 GPa | 200 GPa |
SS 420 vs SS 410 Seamless Tubes: Key Differences
Property | SS 410 Seamless Tubes | SS 420 Seamless Tubes |
|---|---|---|
Carbon Content | Max 0.15% | Min 0.15% (higher carbon) |
Chromium Content | 11.5 to 13.5% | 12.0 to 14.0% |
Max Hardness Achievable | 28.5 HRC | 50 HRC |
Tensile Strength (Annealed) | 480 MPa | 620 MPa |
Wear Resistance | Good | Very Good (superior) |
Corrosion Resistance | Moderate | Moderate (slightly lower when hardened) |
Primary Use | Structural and pressure service | Cutlery, surgical, high-hardness applications |
Applications of SS 420 Seamless Tubes
- Surgical instruments and dental equipment tubing
- Precision shafts, spindles, and rollers
- Hydraulic and pneumatic cylinders in hardened condition
- Oil well pump hardened balls, seats, and valve components
- Plastic injection mold tubes and cores
- Food processing blades and cutting equipment
- Instrumentation lines in petrochemical plants
- Chemical plant tubing exposed to mild organic acids
- Marine shaft sleeves and bushings
Related Products
- Stainless Steel 420 Tubes
- Stainless Steel 420 Welded Tubes
- Stainless Steel 410 Seamless Tubes
- Stainless Steel 410 Welded Tubes
- Stainless Steel 409 Pipes and Tubes
Frequently Asked Questions
What's the lead time for SS 420 Seamless Tubes in hardened condition?
Hardened and tempered SS 420 Seamless Tubes typically require 5 to 7 weeks lead time due to additional heat treatment and testing steps after initial production.
Can SS 420 Seamless Tubes be supplied for surgical instrument manufacturing?
Yes, SS 420 Seamless Tubes are commonly supplied to surgical and dental instrument manufacturers who require high hardness and a fine, defect-free surface finish.
Do you offer volume discounts for dealers and distributors?
Yes, we offer tiered volume discounts for dealers and distributors purchasing on a recurring basis, with pricing reviewed periodically based on order history.
What testing confirms hardness levels before shipment?
Rockwell and Brinell hardness testing is performed on sample pieces from each batch to confirm hardness levels meet ASTM A268 TP420 requirements before dispatch.
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