Stub Ends: MSS SP-43 / ASME B16.9, Short & long pattern. Get quotes from verified suppliers on MetalMitra.
- Stub Ends
- Lap Joint Flanges
- MSS SP-43 / ASME B16.9
- Short & long pattern
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Specifications
| Standard | MSS SP-43 (short), ASME B16.9 (long) |
|---|---|
| Material | ASTM A403 WP304/316, A234 WPB, A815 duplex |
| Size | 1/2" to 24" |
| Schedule | 5S, 10S, 40S, 80S |
| Type | Type A, Type B, Type C |
| Certification | EN 10204 3.1 |
Grades & standards
- Stainless Steel 304
- Stainless Steel 304L
- Stainless Steel 316
- Stainless Steel 316L
- Carbon Steel A234 WPB
- ASTM A403
- ASME B16.9
- MSS SP-43
Chemical composition & mechanical properties
| C | Mn | P | S | Si | Cr | Ni | N |
|---|---|---|---|---|---|---|---|
| 0.07 | 2.00 | 0.045 | 0.030 | 0.75 | 17.5–19.5 | 8.0–10.5 | 0.10 |
| Tensile strength, min | 515 MPa |
|---|---|
| Yield strength (0.2%), min | 205 MPa |
| Elongation in 50 mm, min | 40% |
| Hardness, max | 201 HBW |
Single values are maximums unless marked min. Values per ASTM A240 (plate, sheet and strip); always confirm against the purchase specification and the mill test certificate.
| C | Mn | P | S | Si | Cr | Ni | N |
|---|---|---|---|---|---|---|---|
| 0.030 | 2.00 | 0.045 | 0.030 | 0.75 | 17.5–19.5 | 8.0–12.0 | 0.10 |
| Tensile strength, min | 485 MPa |
|---|---|
| Yield strength (0.2%), min | 170 MPa |
| Elongation in 50 mm, min | 40% |
| Hardness, max | 201 HBW |
Single values are maximums unless marked min. Values per ASTM A240 (plate, sheet and strip); always confirm against the purchase specification and the mill test certificate.
| C | Mn | P | S | Si | Cr | Ni | Mo | N |
|---|---|---|---|---|---|---|---|---|
| 0.08 | 2.00 | 0.045 | 0.030 | 0.75 | 16.0–18.0 | 10.0–14.0 | 2.00–3.00 | 0.10 |
| Tensile strength, min | 515 MPa |
|---|---|
| Yield strength (0.2%), min | 205 MPa |
| Elongation in 50 mm, min | 40% |
| Hardness, max | 217 HBW |
Single values are maximums unless marked min. Values per ASTM A240 (plate, sheet and strip); always confirm against the purchase specification and the mill test certificate.
| C | Mn | P | S | Si | Cr | Ni | Mo | N |
|---|---|---|---|---|---|---|---|---|
| 0.030 | 2.00 | 0.045 | 0.030 | 0.75 | 16.0–18.0 | 10.0–14.0 | 2.00–3.00 | 0.10 |
| Tensile strength, min | 485 MPa |
|---|---|
| Yield strength (0.2%), min | 170 MPa |
| Elongation in 50 mm, min | 40% |
| Hardness, max | 217 HBW |
Single values are maximums unless marked min. Values per ASTM A240 (plate, sheet and strip); always confirm against the purchase specification and the mill test certificate.
| C | Mn | P | S | Si |
|---|---|---|---|---|
| 0.30 | 0.29–1.06 | 0.050 | 0.058 | 0.10 min |
| Tensile strength, min | 415 MPa |
|---|---|
| Yield strength (0.2%), min | 240 MPa |
| Elongation in 50 mm, min | 22% |
| Hardness, max | 197 HBW |
Single values are maximums unless marked min. Values per ASTM A234 (wrought fittings); always confirm against the purchase specification and the mill test certificate.
Source Stub Ends from verified manufacturers, mills and stockists on MetalMitra. Short and long pattern stub ends that pair with lap joint flanges, available in stainless, carbon and alloy steels.
Share your size, grade, quantity and delivery location once, and compare offers from suppliers who stock or manufacture Stub Ends to MSS SP-43 (short).
What you can source
- Lap Joint Flanges — Backing flanges to ASME B16.5.
- Stub Ends — Short and long pattern stub ends to MSS SP-43 / B16.9.
- Flange + Stub Sets — Matched backing flange and stub end assemblies.
- Coated Backing Flanges — Galvanised or painted CS backing flanges.
Key properties
- Easy Alignment — The flange rotates freely for quick bolt-hole alignment.
- Cost Saving — Use a CS backing flange with a stainless or alloy stub end.
- Easy Maintenance — Simple dismantling for lines that need frequent cleaning.
- Low Stress — Suited to low-pressure lines with thermal movement.
Applications & industries
- Process Piping
- Water Lines
- Chemical Plants
- Food & Dairy
- Pharmaceutical
- Fire Fighting
- General Utilities
Testing & documentation
Inspection and documentation for Stub Ends follow MSS SP-43 (short), ASME B16.9 (long) plus any extra requirements in your PO.
- Visual & dimensional inspection
- Positive material identification (PMI)
- Hardness test
- Ultrasonic test as applicable
- Third-party inspection on request
- EN 10204 3.1 Mill Test Certificate
Why source on MetalMitra
- Verified suppliers — Mills, manufacturers and stockists are reviewed by the MetalMitra team before they list.
- One RFQ, several quotes — Share size, grade and quantity once and compare offers side by side.
- Full traceability — Heat numbers, test certificates and third-party inspection on request.
- Delivered worldwide — Export-worthy packing and shipping to India, the Middle East, Africa, Europe and the Americas.
Request pricing
Post an RFQ for Stub Ends with your drawing or specification and receive quotes from verified suppliers.
Technical note: Values on this page are for reference. Always confirm against the governing standard, your purchase specification and the test certificate.
Applications & industries
- Process Piping
- Water Lines
- Chemical Plants
- Food & Dairy
- Pharmaceutical
- Fire Fighting
- General Utilities
- Oil & Gas
- Petrochemical & Refining
- Chemical Processing
- Water & Wastewater
- Pharmaceutical
- Food & Dairy
Testing & documents
Ask for the documents you need in your requirement — suppliers confirm them in their quotation:
- Mill test certificate to EN 10204 3.1, or 3.2 with third-party witness
- Third-party inspection (TPI) by SGS, Bureau Veritas, TÜV or your nominated agency
- Tests as the standard or your order requires: hydro, PMI, IGC, NDT, hardness or impact tests
FAQs
It lets you use a cheaper backing flange material while only the stub end contacts the process fluid.
Short pattern (MSS SP-43) stub ends are compact; long pattern (ASME B16.9) ones offer more length for welding.
They are mainly used for low- to medium-pressure services.
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