ASME SA517 Grade P Steel Plate | SA517 Gr.P QT High Strength Vessel Plate

ASME SA517 Grade P sits between Grade F and Grade Q on thickness. Grade F stops at 65 mm. Grade P may be furnished up to 100 mm (4 in.). Grade Q and Grade E go to 150 mm. If the course is 80 mm and the drawing names Grade P, that is the correct specification—not Grade F, and not an automatic swap to Grade Q. As a China mill Agent, SHH STEEL supplies this plate to ASME SA-517/SA-517M.

The same plate is written SA517 Gr.P, SA517GRP, SA517 GR P, SA-517 Grade P, SA517 Grade P, ASTM A517 Grade P, A517 Gr.P, A517GRP and A/SA517 Grade P. They all mean Grade P in ASME SA-517. The ASTM companion is A517/A517M.

ASME SA-517 lists eight grades—A, B, E, F, H, P, Q and S. They share one mechanical table where thickness overlaps. They do not share alloy content or maximum thickness. Grade P is a higher-nickel Cr-Mo alloy. Nickel heat analysis is 1.20–1.50%, in the same nickel band as Grade Q, with chromium lower than Grade Q.

The steel is killed and made to fine austenitic grain practice under ASME SA-20. Heat treatment is mandatory quench and temper: austenitize at not less than 900 °C, quench in water or oil, temper at not less than 620 °C. As-rolled or normalize-only plate is not SA517 Gr.P.

Do not mix this page with ASME SA515 or ASME SA516. Those are carbon vessel plates. ASME SA517 Grade P is a QT alloy plate. It is also not structural A514. A514 is a structural specification. SA-517 is a pressure-vessel specification with SA-20 general requirements and Code testing.

For Code work the plate is used under ASME Section VIII. Dual marking ASME SA517 Grade P / ASTM A517 Grade P is available. Certificates can be EN 10204 3.1 or EN 10204 3.2.

When a project is still choosing high-strength vessel plate, China mill-Direct Supply puts SA517GRP next to ASME SA537 Class 2, ASTM A537, ASME SA387 and ASTM A285, so the buyer can see whether they actually need 690 MPa QT or a lower-strength carbon / Cr-Mo route.

This plate belongs to the Pressure Vessel Steel Plates family. It is not a structural HSLA Steel Plates substitute and not a Carbon Steel Plates grade.

Chemistry for ASME SA517 Grade P is reported as heat analysis and, when specified, product analysis under ASME SA-517/SA-517M. Grade P is a Ni-Cr-Mo alloy. Nickel is in the same heat band as Grade Q (1.20–1.50%). Chromium is 0.85–1.20%, lower than Grade Q.

Heat Analysis — ASME SA517 Grade P / SA517 Gr.P

Product Analysis — SA517GRP / A517 Grade P

A Grade F heat cannot be recertified as Grade P. Nickel on Grade F is 0.70–1.00%. A Grade Q heat cannot be recertified as Grade P either: chromium and vanadium bands differ, and Grade Q exists for 150 mm. If the drawing says ASME SA517 Grade P, the ladle must sit in the Grade P table. As a China mill Distributor, SHH STEEL reports heat analysis on every certificate and adds product analysis when ASME SA-20 or the vessel specification requires it.

Tighter phosphorus, sulfur or residuals are supplementary. Vacuum carbon deoxidation and other A20 chemistry items are available when written on the order.

Grade P uses both lines of the SA-517 tensile table up to its 100 mm ceiling.

Tensile Requirements — ASME SA517 Grade P per ASME SA-517/SA-517M

There is no 150 mm line on Grade P. If the plate is 110 mm, Grade P is outside ASME SA-517. That job belongs to Grade Q or Grade E.

Density is 7.85 g/cm³. Hardness after QT is typically in a high-strength vessel range; a special HBW window is a supplementary requirement.

ASME SA-517 requires transverse Charpy V-notch testing with a minimum lateral expansion of 0.38 mm (0.015 in.) on each specimen. The test temperature is agreed between purchaser and manufacturer. Write the temperature on the PO.

Specimens follow ASME SA-20. If simulated PWHT is specified, coupons from the same SA517 Gr.P heat follow the vessel cycle before tensile and impact testing. On QT 690 MPa plate that request should be on the mill order whenever the shop will PWHT the vessel.

Order ASME SA517 Grade P when the drawing names Grade P and thickness is 100 mm or less. If thickness exceeds 100 mm, Grade P is not available under SA-517. If the plate is 50 mm and the drawing allows Grade F, Grade F may be enough. SHH STEEL does not swap P for Q or F on a Code vessel without a written revision.

HSLA Steel Plates and S690QL structural plate are not ASME SA-517. If the equipment is Section VIII, stay on SA517 / A517.

ASME SA517 Grade P exists because some vessels need 690 MPa class QT plate thicker than Grade F and do not need the 150 mm ceiling of Grade Q. The 100 mm limit is the specification limit, not a mill preference.

Allowable stress for Code work comes from ASME Section II Part D for SA-517 Grade P, not from a mill flyer. Impact temperature is an order number.

Typical use is high-pressure process vessels, intermediate-thickness courses, and other fusion-welded parts specified to SA-517 Grade P. It is not a cryogenic 3.5Ni or 9Ni grade, and it is not a creep-focused Cr-Mo grade such as SA387.

SA517GRP is a high-strength QT alloy with a high nickel band. Welding is not the same job as welding SA516 Gr.70.

Procedures for Code work are qualified to ASME Section IX. Consumables should match the required joint strength, toughness and nickel. Hydrogen control, preheat and interpass are mandatory. QT plate in this strength class will crack if it is started cold and wet on a restrained joint.

Preheat depends on thickness, restraint, hydrogen and the qualified WPS. After welding, many shops want to PWHT. On QT plate that decision has to be engineered. A shop cycle that is too hot or too long can drop yield below the SA-517 table. Simulated PWHT of mill coupons should be on the purchase order whenever the vessel specification includes PWHT.

Do not copy an SA516, Grade F or Grade Q procedure onto ASME SA517 Grade P without review. Procedure review can go through steel welding services. The fabricator owns the qualified WPS.

Heat treatment of ASME SA517 Grade P follows ASME SA-517/SA-517M:

• Heat to not less than 900 °C (1650 °F)
• Quench in water or oil
• Temper at not less than 620 °C (1150 °F)

That sequence is the product. As-rolled plate is not SA517 Grade P. Normalized-only plate is not SA517 Grade P.

Holding time follows mill practice and ASME SA-20 thickness rules. If the purchaser fixes a tempering band or a maximum tempering temperature because later PWHT is planned, those limits go on the mill instruction and onto the certificate.

SHH STEEL reports the actual heat-treatment condition on the MTC for every SA517 Gr.P plate.

Delivery condition for this grade is quenched and tempered. That is the only standard condition.

The certificate lists ASME SA517 Grade P and, when dual certified, ASTM A517 Grade P; heat number; heat analysis; product analysis when ordered; tensile results by thickness line; reduction of area; Charpy lateral expansion and test temperature; heat-treatment temperatures; and supplementary tests.

Surface is vessel-plate quality. Shot blasting and shop primer are available. Decorative 2B or BA finishes are not used on QT vessel plate.

Certificates may be EN 10204 3.1 or EN 10204 3.2. BV, LR, DNV, TUV, SGS or the buyer’s agency can witness quench, temper, mechanical tests and documents when the order says so.

Usual supply range from SHH STEEL for SA517 Gr.P QT high strength vessel plate:

• Thickness: 8 mm – 100 mm (Grade P maximum in ASME SA-517 is 100 mm)
• Width: up to about 4000 mm
• Length: up to about 12000 mm

State the ordered thickness clearly. At 65 mm the tensile table changes. A 70 mm plate is ordered and tested to the lower yield line. If the inquiry is 110 mm, Grade P is the wrong grade. Cut-to-length shells and nest sizes are available inside 100 mm.

Dimensional limits follow ASME SA-20. Thickness, width, length, flatness and camber are vessel-plate tolerances. QT plate can move during quench; extra-flatness is a negotiated item.

Ultrasonic testing to A435 or A578 is commonly added. Finished sizes go through steel cutting services. Thermal cutting of 690 MPa QT plate needs preheat and edge control.

Most ASME SA517 Grade P orders add tests beyond the base table.

Simulated PWHT. Same-heat coupons follow the vessel cycle. Tensile and Charpy are run after that cycle.

Charpy details. Base spec is lateral expansion 0.38 mm, temperature agreed. Purchasers often add energy minima and through-thickness location.

NDE. UT to A435 / A577 / A578; edge MT/PT after cutting.

Hardness survey. Through-thickness or surface HBW/HV after QT or after simulated PWHT.

Restricted chemistry. Tighter P, S, residuals or vacuum treatment per A20.

HIC / NACE. Only when the datasheet cites TM0284 or MR0175 / ISO 15156. Grade P is not automatically sour-service plate.

Z-direction. A770 or Z15/Z25/Z35 for thick nozzles and strained joints.

Third-party. Witness of quench, temper, testing and documents. Output can be EN 10204 3.2.

These tests run through steel testing service. If it is not on the purchase order, it is not assumed.

For stamping, write ASME SA517 Grade P or dual SA517 / A517 Grade P. Nearby vessel pages: ASME SA537, ASTM A537, ASME SA516, ASTM A516.

ASME SA517 Grade P / SA517 Gr.P is selected when a Section VIII or equivalent vessel needs QT alloy strength and thickness stays at or below 100 mm.

Related pages: petrochemical industry, energy industry, steel cutting services, steel welding services, steel testing service, worldwide shipping service.

SHH STEEL works as a China Mill Direct Exporter for plates to ASME SA-517/SA-517M. On ASME SA517 Grade P that means mill pricing, dual SA517/A517 marking, heat and product analysis including the 1.20–1.50% Ni band, mandatory QT with recorded temperatures, Charpy lateral expansion at the agreed temperature, 3.1 as standard and 3.2 when specified, and the extra tests a 690 MPa vessel shop actually writes on the PO.

We also keep the order on the right grade. Grade P is not Grade F. Grade P is not Grade Q. Grade P is not A514. If the thickness is 110 mm, we will say so before anyone tries to buy Grade P. Export packing goes through worldwide shipping service. Company scope: China steel Mill Agent-SHH STEEL.

ASME SA517 Grade P Steel Plate is the higher-nickel Cr-Mo, quenched-and-tempered high-strength vessel grade in ASME SA-517/SA-517M, limited to 100 mm. Whether the inquiry says SA517 Gr.P, SA517GRP, SA-517 Grade P or A517 Grade P, SHH STEEL supplies plate with heat and product analysis, recorded QT, thickness-correct tensile lines, agreed Charpy testing, optional simulated PWHT, and EN 10204 3.1 or 3.2 certification.

As a China mill Distributor, SHH STEEL provides ASME SA517 Grade P / SA517 Gr.P QT High Strength Vessel Plate for ASME Section VIII fabrication.

Contact SHH STEEL for mill rolling, QT, dual SA517/A517 marking, 3.2 inspection or a quotation.

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