ASTM A514 Grade Q Steel Plate | A514 Gr.Q 100ksi QT Structural Plate supplier

ASTM A514 Grade Q, also searched as A514 Gr.Q, A514GRQ, A514-Q, A514Q, T-1 Grade Q and 100 ksi QT plate, is the thick-plate grade in ASTM A514/A514M. That book covers quenched-and-tempered alloy structural plates intended primarily for welded bridges and other structures. Maximum thickness for Grade Q is 6 in / 150 mm. General requirements follow ASTM A6 / ASME SA-6, not A20 / SA-20.

There is no ASME SA-514 / SA-514M book in current Section II, Part A. Inquiries that write SA514 Gr.Q are still buying ASTM A514 Grade Q. Code quenched-and-tempered vessel plate is ASTM A517 Grade Q, not A514.

This page is not A572 Gr.50. A572 is Nb-V HSLA in the as-rolled or normalized condition. This page is not EN 10025-6 S690QL. S690QL is a European QT comparison, not an automatic swap.

Tensile and yield change with thickness. To 2½ in / 65 mm, yield is 100 ksi / 690 MPa min and tensile is 110–130 ksi / 760–895 MPa. Over 2½ in to 6 in / 65–150 mm, yield drops to 90 ksi / 620 MPa min and tensile is 100–130 ksi / 690–895 MPa. Delivery is quenched and tempered. Grade Q chemistry carries nickel, chromium, molybdenum and vanadium.

SHH STEEL is a global steel mill sourcing partner and steel manufacturer & exporter (mill-direct, China origin). We buy this grade from qualified Chinese mills, check Ni-Cr-Mo-V on the heat analysis, record QT on the certificate, and ship plate to fabricators in the USA, Europe, Middle East, Southeast Asia, Africa and South America.

Related category pages: structural steel plates, ASTM A572 / A572M and EN 10025-6.

Grade Q is the Ni-Cr-Mo-V member of A514. Heat analysis is the mill table. Product analysis, when ordered, follows A6 product-analysis tolerances.

Heat Analysis — ASTM A514 Grade Q

Grade B has no nickel window and is limited to 32 mm. Grade E has 1.40–2.00% Cr and no nickel requirement. Grade S has no chromium window and is limited to 65 mm. Do not accept a B or S heat on a Grade Q order. SHH STEEL prints heat analysis on every certificate. Density is 7.85 g/cm³.

Buyers search A514 Gr.Q mechanical properties, A514GRQ yield, A514 Q 100 ksi and T-1 Grade Q tensile.

Tensile, Yield and Hardness — ASTM A514 Grade Q

Reduction of area also applies on the book for certain specimen types. Do not quote 690 MPa yield on a 80 mm plate. Over 65 mm the book already drops to 620 MPa.

A572 Gr.50 is 345 MPa yield. ASTM A36 steel plate is 250 MPa yield. Neither is A514.

There is no official one-to-one worldwide swap for A514 Gr.Q. What buyers compare is the 690 MPa QT structural idea.

In the United States the official plate name is ASTM A514 Grade Q. Market shops still say T-1. T-1 is a product name, not the ASTM grade. ASTM A517 Grade Q is the vessel QT cousin under A20. Do not dual-mark A514 as A517 unless both books are fully met.

In Europe the usual comparison is EN 10025-6 S690Q, EN 10025-6 S690QL or EN 10025-6 S690QL1. See EN 10025-6. Those grades have their own impact tables. Dual marking only when both books are met.

In China there is no daily GB/T 1591 twin at 690 MPa QT that copies Grade Q chemistry. Q690 or similar market plate is a comparison, not an automatic A514 Gr.Q certificate.

Buyers pick A514 Gr.Q when a boom, trailer frame, mining chassis or bridge member wants 100 ksi yield and the plate is thicker than Grade B or Grade H can go. Search phrases such as A514GRQ, A514 Grade Q, A514-Q, T-1 Grade Q and 100 ksi QT plate all point here.

It is the wrong plate for a Section VIII vessel that names SA-517. That work is ASTM A517 Grade Q. It is the wrong plate for a 345 MPa frame that names A572 Gr.50.

SHH STEEL supplies this plate to fabricators in the United States, Mexico, South America, Europe, the Middle East, Africa and Asia.

A514 Grade Q is killed QT alloy structural plate at 690 MPa yield. Treat welding as production welding. Heat input, preheat and interpass have to stay inside a written WPS.

Qualify to the applicable structural code. Consumables must match a 100 ksi QT family. A procedure written for A572 Gr.50 is 345 MPa HSLA, not A514. A procedure written for EN 10025-6 S690QL is close in strength class but is not automatically the A514 WPS. Do not overheat the plate and then call it still Grade Q. The fabricator owns the WPS. SHH STEEL can share mill heat data for that review.

Usual delivery from SHH STEEL for A514 Gr.Q is quenched and tempered.

A514 does not supply Grade Q as-rolled or normalized only. If the mill skipped quench and temper, the plate cannot be certified A514 Grade Q.

If the job wants Charpy, write the temperature and joules. A514 does not automatically include impact. Bridge and crane files often add CVN. Extra simulation, 3.2 hold points or special NDE add time. Plan about two months when those extras are on the order.

The certificate lists ASTM A514 Grade Q; heat number; heat analysis including Ni, Cr, Mo and V; tensile to the thickness table; QT delivery. Certificates may be EN 10204 3.1 or EN 10204 3.2.

Usual supply range from SHH STEEL for A514 Gr.Q 100 ksi QT structural plate:

• Thickness: commonly 6 mm – 150 mm (Grade Q max 6 in)
• Width: 1500 mm – 4000 mm
• Length: 3000 mm – 12000 mm

Do not order Grade B for 80 mm. Grade B stops at 32 mm. Grade Q, Grade E and Grade P are the 150 mm grades. Browse more sizes on the products index.

Dimensional limits for ASTM A514 Grade Q follow ASTM A6 / ASME SA-6 unless the purchase order names another table. Do not apply pressure-vessel A20 extras unless the order writes them.

Typical thickness tolerance idea for A514 Gr.Q (A6 / SA-6 reference)

Width on 1500–4000 mm plate is commonly held to about ±20–25 mm unless a tighter extra is named. Length on 3000–12000 mm plate is commonly held to about +50 / 0 mm or ±25 mm by mill practice. Flatness follows A6 / SA-6 unless a tighter class is written. SHH STEEL will not assume a zero-minus extra on A514GRQ unless the order says so.

A514 Grade Q already defines chemistry, QT and the thickness-dependent 100/90 ksi table. Extra items still have to be written on the purchase order.

Book name. Write ASTM A514 Grade Q. If the inquiry said SA514, state on the PO that the mill will certify A514.

Charpy details. Write temperature, joules, location and orientation.

Product analysis. Especially C, Ni, Cr, Mo, V, P and S.

Through-thickness / Z-test. Name Z15, Z25 or Z35 when the plate will be welded in the thickness direction.

NDE. A6 ultrasonic extras as named.

Hardness. The book already gives 235–293 HBW on plate to 20 mm. Repeat a cap if the file needs it on thicker plate.

Identification and stamping. Heat number, A514 Grade Q, thickness and mill logo.

Third-party witness. EN 10204 3.2 with SGS, TÜV, BV, ABS, CCS, DNV or the inspector named.

A514 Grade Q is the plate for a file that wants 100 ksi QT structural plate up to 150 mm. It is the wrong plate for a pressure vessel that names SA-517. That work sits on ASTM A517 Grade Q. It is the wrong plate for ordinary carbon frames. That work sits on ASTM A36 steel plate or structural steel plates.

SHH STEEL sources ASTM A514 Grade Q from first-line Chinese mills and ships it on worldwide terms. Partner mills include Wuyang (Wugang), Angang, Shougang, Hanye, Anyang Iron & Steel, Baosteel, Xinyu, Xingcheng, Yongjin, Tsingshan, TISCO (Taiyuan), Jiuquan (JISCO), Lianzhong, Zhangpu and Baoxin, plus other qualified mills when the size or QT route requires it.

Mill test certificates are issued to EN 10204 3.1 as standard. EN 10204 3.2 is arranged when the order names a third-party hold point.

Usual stock and rolling thickness: 8 mm, 10 mm, 12 mm, 16 mm, 20 mm, 25 mm, 30 mm, 32 mm, 40 mm, 50 mm, 60 mm, 80 mm, 100 mm, 120 mm, 150 mm.

Processing: CNC or flame cutting, bevel, flattening, UT to the named class.

Trade terms: FOB Shanghai main, CIF destination available. Payment: TT, LC, or TT + LC.

Ocean time from Shanghai: US West 14–18 days; US Gulf 28–35 days; Rotterdam / Antwerp 28–35 days; Jebel Ali 18–25 days; Singapore 7–12 days; other ports quoted.

Third-party: SGS, TÜV, BV, ABS, CCS, GL, VL, DNV, RINA, NK, KR, or the inspector named.

SHH STEEL is a global steel mill sourcing partner with mill partnerships in China. We supply ASTM, ASME, EN, DIN, JIS and GB steel to buyers in the United States, Europe, the Middle East, Southeast Asia, Africa and South America. Origin is mill-direct, China origin.

SHH STEEL has supplied steel plates to the USA, Mexico, Argentina, Peru, El Salvador, Spain, Netherlands, Germany, UAE, Saudi Arabia, South Africa, India, Thailand, Singapore, Vietnam, the Philippines, Japan and Korea.

Typical lead time: ex-stock 5–7 days; standard rolling / QT about 45–60 days; 3.2 inspection about 2 months.

Experience on this grade is simple: print A514 Grade Q, keep QT on the certificate, and do not invent SA-514. SHH STEEL as a global steel mill sourcing partner and steel manufacturer & exporter (mill-direct, China origin) prices A514GRQ from first-line mills, reports Ni-Cr-Mo-V chemistry, records the 100/90 ksi thickness table, and issues 3.1 as standard or 3.2 when specified.

We keep the book on the order. A514GRQ is not ASTM A517 Grade Q. A514 Grade Q is not A572 Gr.50. A514 Grade Q is not Grade B at 80 mm. If the drawing says vessel QT or 345 MPa HSLA, we will not ship Grade Q and call 100 ksi close.

ASTM A514 Grade Q Steel Plate is quenched-and-tempered 100 ksi structural plate, 690 MPa yield to 65 mm and 620 MPa yield to 150 mm. Whether the inquiry says ASTM A514 Grade Q, A514 Gr.Q, A514GRQ, A514-Q, T-1 Grade Q or SA514 Gr.Q, SHH STEEL as a global steel mill sourcing partner and steel manufacturer & exporter (mill-direct, China origin) supplies plate with Grade Q chemistry, the A514 thickness table, recorded QT delivery, and EN 10204 3.1 or 3.2 certification.

SHH STEEL supplies ASTM A514 Grade Q / A514 Gr.Q 100ksi QT Structural Plate to the USA, Mexico, South America, Europe, the Middle East, Africa and Asia for work that actually names this grade.

Contact SHH STEEL for mill rolling, stock inquiry, cutting, bevel, 3.2 inspection or a worldwide quotation.

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