AlloyTP316 / 316L Stainless Steel
FamilyStainless & Duplex
Supplied toASME SA213, ASME SA249, ASTM A213, ASTM A249
Typical serviceChloride service, Chemical process, Marine
Size range1/4" to 4" OD, .028" to .250" wall, straight lengths and U-bends
TempersSolution annealed and pickled, or bright annealed
Testing100% eddy current or ultrasonic per SA213/SA249, hydrostatic, flattening, flaring; intergranular corrosion and PMI on request
OriginDomestic and approved import mills, inspected and certified in Hillsboro
Sourced alloy, certified in HillsboroAmeritube does not manufacture TP316 / 316L in Texas. It is supplied from qualified domestic and international mills, then received, inspected, tested, and released under our ISO 9001:2015 system in Hillsboro, Texas, with a full mill test report.
What TP316 / 316L is
Type 316 is an 18Cr-10Ni austenitic stainless with 2 to 3% molybdenum. The molybdenum stabilizes the passive film against chloride pitting, making 316 the standard step up from 304 for marine atmospheres, brackish cooling water, and chemical process streams. The L grade limits carbon for weldability.
Chemical composition, 316L
| Element | Requirement |
|---|---|
| Carbon | 0.035% max |
| Chromium | 16.0 to 18.0% |
| Nickel | 10.0 to 14.0% |
| Molybdenum | 2.00 to 3.00% |
| Manganese | 2.00% max |
Mechanical properties
| Property | 316 | 316L |
|---|---|---|
| Tensile strength, min | 75,000 psi | 70,000 psi |
| Yield strength, min | 30,000 psi | 25,000 psi |
| Elongation in 2", min | 35% | 35% |
Where it is used
- Heat exchangers on brackish or treated cooling water.
- Chemical process exchangers handling organic acids, phosphoric acid, and chlorinated streams.
- Marine and offshore instrumentation and process tube.
- Pharmaceutical and food processing where 304 has pitted.
Beyond 316L
Seawater, hot chloride brines, or chloride stress corrosion cracking risk: SA789 duplex, C70600 copper-nickel, or the nickel alloys. We quote all of them from the same desk.
What to put in your TP316 / 316L RFQ
Seamless or welded, OD, wall, length or U-bend schedule, quantity, finish, PMI requirement, and the chloride level or process fluid so we can confirm 316L is adequate or suggest duplex.