ASTM A1017 Grade 911 Steel Plate | A1017 Gr.911 9Cr-1Mo-W Vessel Plate

ASTM A1017 Grade 911, also searched as A1017 Gr.911, A1017GR911, A1017-911, SA-1017 Grade 911, SA1017 Gr.911, P911 plate, A387 Gr.911 Cl.2 and SA387 Grade 911 Class 2, is the 9Cr-1Mo-1W-V-Nb pressure-vessel grade now written in ASTM A1017/A1017M. That book covers chromium-molybdenum-tungsten plates for welded boilers and vessels at elevated temperature. General requirements follow ASTM A20 / ASME SA-20.

Grade 911 used to sit in ASTM A387. Current A387 says Grade 911 is now covered by A1017. Inquiries that still write ASTM A387 Grade 911 Class 2 or ASME SA387 Grade 911 Class 2 are buying this plate. The certificate should name A1017 Grade 911 or SA-1017 Grade 911 when that is the current book on the order.

This page is not ASTM A387 Grade 91 Class 2. Grade 91 is 9Cr-1Mo-V-Nb without the 0.90–1.10% tungsten window. This page is not A1017 Grade 92. Grade 92 is 9Cr-0.45Mo-1.75W. This page is not ASTM A387 Grade 9 Class 2. Grade 9 is 9Cr-1Mo without V, Nb or W.

Tensile is 90–120 ksi / 620–840 MPa. Yield is 64 ksi / 440 MPa min. Elongation is 18% in 2 in. Delivery is normalized and tempered. Typical austenitize is 1900–1975 °F / 1040–1080 °C. Typical temper for Grade 911 is 1365–1435 °F / 740–780 °C. A1017 does not split Grade 911 into Class 1 and Class 2. There is one tensile table.

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 W, V, Nb and N on the heat analysis, record N+T on the certificate, and ship plate to fabricators in the USA, Europe, Middle East, Southeast Asia, Africa and South America.

Related category pages: ASTM A387, ASME SA387 and pressure vessel steel plates.

European 9Cr comparison belongs on EN 10028-2, especially EN 10028-2 X10CrMoVNb9-1. That grade is P91, not 911.

Grade 911 is defined by tungsten plus the 9Cr-1Mo-V-Nb family. Heat analysis and product analysis both belong on the certificate when the order asks for product analysis.

Heat Analysis and Product Analysis — ASTM A1017 Grade 911

If tungsten is missing, the heat is not Grade 911. It may be ASTM A387 Grade 91 Class 2. If tungsten is near 1.75% and molybdenum is only 0.30–0.60%, the heat is Grade 92, not 911. SHH STEEL prints heat analysis on every certificate. Density is 7.85 g/cm³.

Buyers search A1017 Gr.911 mechanical properties, A1017GR911 yield, P911 tensile and SA-1017 Grade 911 tensile.

Tensile and Yield — ASTM A1017 Grade 911

Grade 91 Class 2 is 585–760 MPa with 415 MPa yield. Do not quote those numbers on a 911 order. Grade 92 uses the same 620–840 MPa / 440 MPa band as 911, but the chemistry is not the same. Grade 23 is 510–690 MPa / 400 MPa. Grade 122 is 620 MPa min / 400 MPa.

There is no official one-to-one worldwide swap for A1017 Gr.911. What buyers compare is the P911 / 9Cr-1Mo-1W idea.

In the United States the current plate name is ASTM A1017 Grade 911. The Code name is SA-1017 Grade 911. Older drawings still say ASTM A387 Grade 911 Class 2 or ASME SA387 Grade 911 Class 2. ASTM A387 Grade 91 Class 2 is P91.

In Europe there is no daily EN 10028-2 twin written as 911. EN 10028-2 X10CrMoVNb9-1 is P91. See EN 10028-2.

In Japan and on pipe/tube jobs the same alloy idea is P911 / T911. Plate still has to meet A1017 Grade 911 or SA-1017 Grade 911 when that is the plate specification.

Dual marking is possible only when both books are fully met.

Buyers pick A1017 Gr.911 when a boiler, header or high-temperature vessel file wants P911 chemistry and the 620–840 MPa table. Search phrases such as A1017GR911, A1017 Grade 911, SA-1017 Grade 911, P911 plate and A387 Gr.911 Cl.2 all point here.

It is not a substitute for ASTM A387 Grade 91 Class 2. That grade has no tungsten. It is not a substitute for ASTM A387 Grade 22 Class 2. That grade is 2.25Cr-1Mo.

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

A1017 Grade 911 is killed 9Cr-1Mo-1W-V-Nb vessel plate at 620–840 MPa. Treat welding as production welding, and as ASME Section I / Section VIII welding when the equipment is Code work.

Qualify to the applicable code. Consumables must match a P911 family. A procedure written for ASTM A387 Grade 91 Class 2 is P91, not P911. A procedure written for ASTM A387 Grade 9 Class 2 is 9Cr-1Mo without W/V/Nb. Preheat, interpass and PWHT must stay inside the qualified WPS. Grade 911 temper is already 740–780 °C; PWHT must not walk into the wrong side of Ac1. The fabricator owns the WPS. SHH STEEL can share mill heat data for that review.

Usual delivery from SHH STEEL for A1017 Gr.911 is normalized and tempered.

• Austenitize: 1040–1080 °C (1900–1975 °F)
• Temper for Grade 911: 740–780 °C (1365–1435 °F)

Grades 23, 92 and 122 in the same book temper at 730–800 °C. Do not use that wider band on 911 if the order cites the 911 temper table.

Annealed plate cannot be Grade 911. If the mill only annealed the heat, it cannot be certified A1017 Grade 911.

If the vessel will see PWHT, say so. Simulated PWHT on test coupons is worth naming on P911 work. 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 A1017 Grade 911 and/or SA-1017 Grade 911 as the order named; heat number; heat analysis including W, V, Nb and N; tensile to the 911 table; heat-treatment route and temperatures. Certificates may be EN 10204 3.1 or EN 10204 3.2.

Usual supply range from SHH STEEL for A1017 Gr.911 9Cr-1Mo-W vessel plate:

• Thickness: commonly 6 mm – 150 mm, thicker by mill agreement
• Width: 1500 mm – 4000 mm
• Length: 3000 mm – 12000 mm

Maximum thickness is limited by the ability of the composition to meet the 911 tensile table. P91 plate belongs on ASTM A387 Grade 91 Class 2. 9Cr-1Mo plate belongs on ASTM A387 Grade 9 Class 2.

Dimensional limits for ASTM A1017 Grade 911 follow ASTM A20 / ASME SA-20 unless the purchase order names another table.

Typical thickness tolerance idea for A1017 Gr.911 (A20 / SA-20 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 A20 / SA-20 unless a tighter class is written. Edge condition is mill edge or cut edge as ordered. If the vessel calculation used minimum thickness after corrosion, write the allowed minus on the RFQ. SHH STEEL will not assume a zero-minus extra on A1017GR911 unless the order says so.

A1017 Grade 911 already defines chemistry, the 620–840 MPa table and N+T. Extra items still have to be written on the purchase order.

Book name. Write A1017 Grade 911, SA-1017 Grade 911, or both. If the drawing still says A387 Grade 911 Class 2, say how the mill should print the certificate.

Heat-treatment route. Write normalized and tempered with the 911 temper band. Do not accept annealed plate.

Charpy details. Write temperature, joules, location and orientation if impact is required.

Simulated PWHT. Name hold temperature, hold time and cooling rate on the coupon.

Product analysis. Especially C, Cr, Mo, W, V, Nb, N, P and S.

Through-thickness / Z-test. Name Z15, Z25 or Z35 when needed.

NDE. A20 / SA-20 ultrasonic extras, ASTM A435 or ASTM A578 as named.

Hardness. Write max HB after heat treatment or after simulated PWHT if the file caps it.

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

Identification and stamping. Heat number, A1017 Grade 911 / SA-1017 Grade 911, thickness and mill logo.

A1017 Grade 911 is the plate for a file that wants P911 / 9Cr-1Mo-1W-V-Nb. It is the wrong plate for P91. That work is ASTM A387 Grade 91 Class 2. It is the wrong plate for 2.25Cr-1Mo. That work is ASTM A387 Grade 22 Class 2.

SHH STEEL sources ASTM A1017 Grade 911 / SA-1017 Grade 911 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 heat-treatment 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, 36 mm, 40 mm, 50 mm, 60 mm, 80 mm, 100 mm, thicker by mill agreement.

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 / N+T about 45–60 days; simulated PWHT / 3.2 about 2 months.

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Experience on this grade is simple: keep tungsten on the certificate, keep 911 away from 91, and print A1017 when that is the current book. SHH STEEL as a global steel mill sourcing partner and steel manufacturer & exporter (mill-direct, China origin) prices A1017 Gr.911 from first-line mills, reports 9Cr-1Mo-1W-V-Nb chemistry, records N+T in the 911 temper band, and issues 3.1 as standard or 3.2 when specified.

We keep the grade on the order. A1017GR911 is not ASTM A387 Grade 91 Class 2. A1017 Grade 911 is not A1017 Grade 92. A1017 Grade 911 is not EN 10028-2 X10CrMoVNb9-1. If the drawing says Grade 91, we will not ship 911 and call 9Cr enough.

ASTM A1017 Grade 911 Steel Plate is 9Cr-1Mo-1W-V-Nb pressure-vessel plate at 620–840 MPa tensile and 440 MPa yield. Whether the inquiry says ASTM A1017 Grade 911, A1017 Gr.911, A1017GR911, SA-1017 Grade 911, P911, A387 Gr.911 Cl.2 or SA387 Grade 911 Class 2, SHH STEEL as a global steel mill sourcing partner and steel manufacturer & exporter (mill-direct, China origin) supplies plate with 911 chemistry, the 911 tensile table, recorded N+T delivery, and EN 10204 3.1 or 3.2 certification.

SHH STEEL supplies ASTM A1017 Grade 911 / A1017 Gr.911 9Cr-1Mo-W Vessel 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.

ASTM A1017 Grade 911 Steel Plate, A1017 Gr.911, A1017GR911, P911 plate, 9Cr-1Mo-W vessel plate, A1017 Gr.911 supplier, SHH STEEL