JIS G3115 SPV355 Steel Plate | SPV355 Pressure Vessel Plate

JIS G3115 SPV355, also written SPV 355, JISG3115 SPV355 and SPV355 steel plate, is a weldable pressure-vessel plate under JIS G3115. The standard title is Steel plates for pressure vessels for intermediate temperature service. SPV355 is the third strength step in that book and the grade buyers search most often when they want a Japanese vessel plate in the same strength conversation as SA516 Gr.70. Yield is 355 MPa at 6–50 mm. Tensile is 520–640 MPa. Thickness may run to 150 mm. Usual delivery is as-rolled, with normalize allowed. TMCP or QT is allowed by agreement. SHH STEEL is a global steel mill sourcing partner and steel manufacturer & exporter (mill-direct, China origin) for this grade. Plate is produced to JIS G3115 and shipped to buyers in the USA, Mexico, South America, Europe, Middle East, Africa and Asia.

A purchase order that only says “SPV plate” or “355 vessel plate” is incomplete. Write JIS G3115 SPV355. Do not ship SPV315 against an SPV355 drawing. Do not ship SPV410 against an SPV355 drawing. Do not ship SA516 Gr.70 and stamp SPV355 because tensile looks close. Yield, impact temperature, Ceq / Pcm and the JIS heat-treatment letter are not the same as ASME SA-516.

JIS G3115 is not a low-temperature vessel book. Low-temperature Japanese plate belongs under JIS G3126. It is not boiler plate under JIS G3103 SB. It is not ordinary structural plate under JIS G3106. Intermediate-temperature service means the plate is intended for pressure vessels and high-pressure equipment that are not specified for high-temperature or low-temperature service under other JIS books.

This page is not DIN 17100 St52-3. It is not SA285 Gr.C. It is not QT alloy under ASME SA387 or ASME SA543. It is not TMCP structural plate under EN 10025-4.

Company scope: global steel mill sourcing partner – SHH STEEL.

This plate sits in pressure vessel steel plates and carbon steel plates. ASME comparisons belong on ASME SA516, ASME SA515 and ASME SA285, not as automatic substitutes.

JIS G3115 SPV355 / SPV 355 heat analysis is given in JIS G3115 Table 3. Product analysis is not printed as a second official column in that table. When a destination file asks for product analysis, SHH STEEL applies the usual JIS check-analysis practice (JIS G0321 style): finished-plate chemistry is allowed a small extra tolerance over heat analysis. Write “heat + product analysis” on the order if both are required.

Heat Analysis and Product Analysis — JIS G3115 SPV355

Other elements may be added for deoxidation or grain practice. Compared with SPV315, carbon is one step higher (0.20 max versus 0.18 max). That extra carbon supports the 355 MPa yield step. For TMCP or QT SPV355, carbon equivalent and Pcm limits from JIS G3115 also apply. Do not treat an SPV315 heat as SPV355. Do not treat an SPV410 heat as SPV355. SHH STEEL reports heat analysis on every certificate and product analysis when the order names it.

If a Houston, Rotterdam, Jebel Ali, Yokohama or Busan specification tightens P and S further, write that on the order. A plate can meet product analysis and still fail if the ladle was outside the heat column. That is why both columns matter on export files.

Yield starts at 355 MPa at 6–50 mm and falls as thickness rises.

Tensile and Yield — JIS G3115 SPV355

Elongation depends on thickness and specimen type. Bend testing is specified. Charpy energy for SPV355 is commonly 0 °C, average 47 J, individual 27 J. Write the test temperature if the destination file wants something other than the JIS default. Do not assume −20 °C or −46 °C just because an ASME vessel file uses those numbers.

Do not quote 355 MPa yield on a 120 mm plate. Do not treat 520–640 MPa tensile as permission to stamp SA516 Gr.70, SA515 Gr.70 or SA299 Gr.B. Those books have their own yield, impact and PWHT rules.

Same book. Different strength and different heat-treatment default. SHH STEEL will not ship SPV355 against an SPV410 TMCP drawing, and will not ship SPV355 against an SPV490 QT drawing.

SA203 Gr.A, SA662 Gr.B and SA737 Gr.B are also vessel or HSLA plates. None of them is SPV355.

JIS G3115 SPV355 / SPV 355 is selected for welded pressure vessels, tanks, heat-exchanger shells and high-pressure equipment that still name the Japanese intermediate-temperature book at the 355 MPa step. Buyers use it when a Japanese drawing, a Japanese mill qualification or a Japanese owner specification is still live. It is the practical Japanese counterpart to a mid-strength carbon vessel plate. It is not automatically an ASME Section VIII plate. If the vessel is ASME, the drawing should name an ASME or ASTM grade such as SA516 Gr.70, SA516 Gr.65 or SA515 Gr.70.

SHH STEEL supplies this plate to fabricators in the United States, Mexico, South America, Europe, the Middle East, Africa and Asia. It is not nickel low-temp plate like SA203 Gr.D or SA203 Gr.E. Those grades use nickel. SPV355 uses killed C-Mn chemistry, JIS impact at 0 °C unless otherwise named, and as-rolled or normalize unless TMCP / QT is written. It is not QT Ni-Cr-Mo like SA543 Type B Cl.1. It is not Cr-Mo like SA387 Gr.22 Cl.2 or SA387 Gr.11 Cl.2. Stainless inquiries belong on ASME SA240 or ASTM A240.

SPV355 is killed C-Mn vessel plate at the 355 MPa step. Welding is production welding, and Code welding when the equipment is a vessel.

Qualify procedures to the applicable code. For ASME work that happens to use a dual-named plate, use ASME Section IX. Consumables should match the 520–640 MPa tensile band, not a SA387 Gr.12 Cl.2 Cr-Mo procedure and not a QT procedure from SA517 Gr.F. When TMCP or QT is used, Ceq and Pcm from JIS G3115 must stay inside the table. Preheat follows thickness and hydrogen control. The fabricator owns the WPS. SHH STEEL can share mill heat data for that review.

Do not weld SPV355 with a procedure written only for ASTM A36 steel plate. Do not assume a SPV235 WPS covers SPV355 because both sit in JIS G3115.

Usual delivery from SHH STEEL is as-rolled JIS G3115 SPV355 / SPV 355 plate. Normalize is allowed when the order names it. TMCP or QT is allowed by agreement and must be written on the purchase order. Those routes are not assumed.

If the vessel will see PWHT, test coupons shall follow a simulated cycle when the order names it. This is not the QT route used on SA738 Gr.B or SA737 Gr.C. Special heat treatment, extra simulation or third-party hold points add time. Plan about two months when those extras are on the order.

The certificate lists JIS G3115 SPV355 (and SPV 355 if requested); heat number; heat analysis; product analysis when ordered; tensile results to the correct thickness column; delivery condition; impact at the named temperature; Ceq / Pcm when TMCP or QT is used. Certificates may be EN 10204 3.1 or EN 10204 3.2. Dual marking to SA516 Gr.70 is not automatic.

Usual supply range from SHH STEEL for SPV355 pressure vessel plate:

• Thickness: commonly 6 mm – 150 mm. Confirm any request above 150 mm against mill capability
• Width: 1500 mm – 4000 mm
• Length: 3000 mm – 12000 mm
• Cut-to-length plates and nest sizes inside those limits

Ship plate inquiries belong on shipbuilding steel plates or BV Rules. Weathering plate belongs on EN 10025-5 or Corten A/B. TMCP fine-grain structural belongs on EN 10025-4. QT structural belongs on EN 10025-6. Ordinary structural belongs on EN 10025-2 or JIS G3106.

Dimensional limits follow the mill rolling standard named on the order. Do not apply ASTM A36/A36M structural tolerances to a JIS vessel plate without writing them. UT to JIS, EN 10160 or ASTM A435 / A577 / A578 is added when the order names it. Flatness, camber and edge condition should be named when the plate will be rolled into a shell.

Most export JIS G3115 SPV355 / SPV 355 orders add extras. SHH STEEL does not assume them.

Charpy details. Temperature, energy, location and orientation. JIS default is commonly 0 °C.

Product analysis. Add this when the destination file wants finished-plate chemistry, not only ladle chemistry.

Ceq / Pcm. Required when TMCP or QT is selected.

Simulated PWHT. When the equipment will be stress-relieved.

NDE. UT per the named method.

Z-direction / through-thickness testing. When the drawing names Z15 / Z25 / Z35.

Third-party. EN 10204 3.2, with inspectors arranged for US, Mexican, European, Middle East, Japanese or Korean documentation packages.

These names are project-comparison grades. They are not automatic substitutes.

ASME SA662 is not SPV355.

Stainless inquiries belong on stainless steel products, JIS G4305 or AISI stainless. Other vessel comparisons: SA203 Gr.B, SA302 Gr.C, A516 Grade 70, SA533 Type C Cl.1, SA517 Gr.P, SA738 Gr.C.

SHH STEEL is a global steel mill sourcing partner with mill partnerships in China. We supply ASTM, ASME, EN, DIN and JIS steel to buyers outside a single region. Origin is mill-direct, China origin. Inquiry packages are written for fabricators and EPC buyers, not only for East Asia.

SHH STEEL has supplied steel plates to:

• North America: USA, Mexico
• South America: Argentina, Peru and other South American ports
• Central America: El Salvador
• Europe: Spain, Netherlands, Germany and surrounding ports
• Middle East: UAE, Saudi Arabia and nearby Gulf ports
• Africa: South Africa
• South / Southeast Asia: India, Thailand, Singapore, Vietnam, Philippines
• East Asia: Japan, Korea

Typical trade terms:

• FOB Shanghai
• CIF Houston
• CIF Rotterdam
• CIF Jebel Ali
• Other CIF / CFR ports on request, including Manzanillo, Callao, Buenos Aires, Barcelona, Durban, Laem Chabang, Ho Chi Minh, Manila, Mumbai, Yokohama and Busan

Typical lead time for JIS G3115 SPV355 / SPV 355:

• Ex-stock / ready plate: about 5–7 days after order confirmation, subject to actual warehouse size and cutting
• Mill rolling, standard as-rolled or normalize: about 45 days
• TMCP / QT, simulated PWHT, 3.2 hold or extra NDE: about 2 months

Documents travel with the cargo: mill certificate, packing list, commercial invoice, bill of lading, and EN 10204 3.1 or 3.2 as ordered. Third-party inspection can be arranged before loading for US, Mexican, European, Middle East, Japanese or Korean documentation packages. Packing is seaworthy, with edge protection and marking in English as specified on the order.

If the buyer actually needs SPV410 TMCP or SPV490 QT, say so on the inquiry. If the buyer needs a PED / 3.2 file, say so on the inquiry. Do not assume a domestic Chinese certificate format will pass at destination.

SHH STEEL is a global steel mill sourcing partner and steel manufacturer & exporter (mill-direct, China origin). We supply ASTM / ASME / EN / DIN / JIS steel to the USA, Mexico, South America, Europe, the Middle East, Africa and Asia. On JIS G3115 SPV355 / SPV 355 that means mill pricing, SPV355 chemistry reported as heat analysis and as product analysis when ordered, recorded delivery condition, tensile results to the correct thickness column, 355 MPa yield in the thin band, 3.1 as standard and 3.2 when specified. Trade terms include FOB Shanghai and CIF Houston / Rotterdam / Jebel Ali.

We keep the grade on the order. SPV355 is not SPV315. SPV355 is not SPV410. SPV355 is not SA516 Gr.70. SPV355 is not SA387 Gr.22 Cl.2. JIS G3115 is not JIS G3103 and not JIS G3126. If the drawing names 410 MPa, we will not ship SPV355 and call it close.

Company scope: global steel mill sourcing partner – SHH STEEL.

plate, is weldable pressure-vessel plate under JIS G3115 for intermediate-temperature service at the 355 MPa yield step, 520–640 MPa tensile, thickness to 150 mm. Whether the inquiry says JIS G3115 SPV355, SPV 355 or SPV355 Pressure Vessel Plate, SHH STEEL as a global steel mill sourcing partner and steel manufacturer & exporter (mill-direct, China origin) supplies plate with SPV355 chemistry, heat and product analysis when ordered, recorded delivery condition, and EN 10204 3.1 or 3.2 certification.

SHH STEEL supplies JIS G3115 SPV355 / SPV355 Pressure Vessel Plate to the USA, Mexico, South America, Europe, the Middle East, Africa and Asia for work that actually names this grade. FOB Shanghai / CIF Houston / Rotterdam / Jebel Ali.

Contact SHH STEEL for mill rolling, stock inquiry, normalize, TMCP / QT by agreement, impact testing, 3.2 inspection or a quotation.

JIS G3115 SPV355 Steel Plate, SPV 355, JISG3115 SPV355, intermediate temperature vessel plate, SPV355 supplier, global steel mill sourcing partner SHH STEEL