ASME SA612 Steel Plate | SA612 High Strength C-Mn-Si Vessel Plate

ASME SA612, also written ASME SA612M, SA-612, SA 612 and A612, is killed carbon-manganese-silicon steel plate under ASME SA-612/SA-612M. The specification is identical with ASTM A612/A612M. It covers high-strength plates intended for welded pressure vessels in service at moderate and lower temperatures. There is no Grade A, Grade B or Grade C in this book. One chemistry table and one tensile table cover the product. SHH STEEL is a global steel mill sourcing partner and steel manufacturer & exporter (mill-direct, China origin) for this specification. Plate is produced to ASME SA-612/SA-612M and shipped to buyers in the USA, Europe, Middle East and Southeast Asia.

Buyers write ASME SA612, ASME SA612M, SA612 steel plate, SA-612, SA 612, A612 steel plate and ASTM A612. A purchase order that invents “SA612 Grade B” is mixing this book with SA662 Gr.B or SA737 Gr.B. This page is not SA516 Gr.70. SA516 Grade 70 is the workhorse moderate-temperature carbon plate at 260 MPa yield. SA612 is the higher-strength C-Mn-Si cousin at 345 MPa yield. It is not QT Ni-Cr-Mo like SA543. It is not heat-treated C-Mn-Si like SA738. It is not HSLA like SA737.

The steel shall be killed. Fine austenitic grain practice follows ASME SA-20 / ASTM A20. Plates may be ordered as-rolled, normalized, stress relieved, or normalized and stress relieved. Dual marking SA612 / A612 is available. Certificates can be EN 10204 3.1 or 3.2. Company scope: global steel mill sourcing partner – SHH STEEL.

This plate sits in pressure vessel steel plates and carbon steel plates. It does not sit with ASME SA387 Cr-Mo alloy plate or ASTM A36 steel plate structural plate.

SA-20 still governs marking, testing location, retests, repair rules and supplementary requirements unless the product specification overrides them.

ASME SA612 / ASME SA612M uses one chemistry table. There is no Grade column.

Heat Analysis and Product Analysis — ASME SA612 (typical Table 1 limits)

Carbon is lower than many SA516 Gr.70 thickness bands. Manganese is higher. That combination is how SA612 reaches 345 MPa yield without becoming a QT alloy. Vacuum carbon-deoxidized steel under S17 may replace part of the table when specified.

SHH STEEL reports heat analysis on every certificate and product analysis when SA-20 requires it. If a Houston, Rotterdam or Jebel Ali specification tightens phosphorus or sulfur, write that on the order.

Tensile depends on thickness. Yield does not.

Tensile Requirements — ASME SA612

Do not quote the thin-plate tensile band on a 20 mm plate. Do not treat 345 MPa yield as a free swap with SA737 Gr.B, which is HSLA with a different chemistry and heat-treatment idea. Do not treat SA612 as SA285 Gr.C.

Density is 7.85 g/cm³. Notch toughness is commonly added for lower-temperature service. Write the temperature, energy, location and orientation. This specification exists because buyers want higher strength than ordinary carbon vessel plate while keeping weldable C-Mn-Si practice.

SA203 Gr.A, SA225 Gr.C and SA455 steel plate are also vessel plates. None of them is ASME SA612.

ASME SA612 / ASME SA612M is selected when the vessel wants higher yield than SA516 Grade 70, still in killed C-Mn-Si, for moderate and lower temperature welded service. Typical equipment is storage vessels, process drums, LPG-related equipment and other Section VIII work that names SA612 or A612. Allowable stress comes from ASME Section II Part D after the Code lists this specification.

SHH STEEL supplies this plate to fabricators in the United States, Europe, the Middle East and Southeast Asia. It is not nickel low-temp plate like SA203 Gr.D or SA203 Gr.E. It is not QT alloy like SA543. It is not SA302 Gr.B. Stainless inquiries belong on ASME SA240 or ASTM A240.

Do not form this plate as if thickness rules from SA285 Gr.A still apply. Tensile drops when thickness crosses 12.5 mm. Write the ordered thickness against Table 2 before issuing a mill ticket.

SA612 is killed C-Mn-Si at 345 MPa yield. Welding is Code welding.

Qualify procedures to ASME Section IX. Use consumables written for this tensile band, not a SA516 Gr.70 procedure copied across without review, and not a QT alloy procedure from SA543. Hydrogen control, preheat and PWHT follow the qualified procedure and the vessel specification.

Do not copy a SA387 Gr.12 Cl.2 procedure onto SA612. The fabricator owns the WPS. SHH STEEL can share mill heat data for that review, including packages prepared for US, EU or Middle East inspectors.

Plates may be ordered as-rolled, normalized, stress relieved, or normalized and stress relieved. The specification does not require quench and temper. If the purchase order is silent, confirm the delivery condition before rolling. Lower-temperature service usually wants normalize plus impact testing.

If the vessel will see PWHT, test coupons shall follow a simulated cycle when the order names it. This is not the SA543 QT route and not the SA537 Cl.1 heat-treated carbon route. Special heat treatment, extra simulation or third-party hold points add time. Plan about two months when those extras are on the order.

Usual delivery from SHH STEEL is ASME SA612 / ASME SA612M plate in the condition named on the purchase order: as-rolled, normalized, or stress relieved.

The certificate lists ASME SA612 and, when dual certified, ASTM A612; heat number; heat analysis; product analysis when ordered; tensile results to the correct thickness column; heat-treatment statement; impact when ordered. Certificates may be EN 10204 3.1 or EN 10204 3.2.

Surface is mill scale unless the order names shot blast, paint or machine allowance. Cutting, beveling and nest sizes belong on the purchase order.

Usual supply range from SHH STEEL for SA612 high strength C-Mn-Si vessel plate:

• Thickness: commonly 6 mm – 25 mm, matching the two tensile columns in the specification. Confirm any request above 25 mm against mill capability and the named edition
• Width: 1500 mm – 4000 mm
• Length: 3000 mm – 12000 mm
• Cut-to-length shells, heads and nest sizes inside those limits

Structural sizes belong on EN 10025-2 or JIS G3106. Weathering plate belongs on EN 10025-5 or Corten A/B. Fine-grain structural belongs on EN 10025-3 or EN 10025-4. QT structural belongs on EN 10025-6.

Dimensional limits follow ASME SA-20. Thickness, width, length, flatness and camber are vessel-plate tolerances, not structural-plate tolerances from ASTM A36/A36M. UT to A435 / A577 / A578 is added when the order names it.

Repair welding of surface defects follows SA-20 rules unless the order forbids repair.

Most export ASME SA612 / ASME SA612M orders add extras. SHH STEEL does not assume them.

Charpy details. Temperature, energy, location and orientation. Lower-temperature service is the reason this specification exists.

Simulated PWHT. Same-heat coupons follow the vessel cycle when named.

NDE. UT to A435 / A577 / A578.

Vacuum carbon deoxidation (S17). When specified.

Normalize statement. When the drawing names it.

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

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

DIN 17100 and ASTM A285 are not SA612.

Ship plate inquiries belong on shipbuilding steel plates or BV Rules. Weathering inquiries belong on weathering steel plates. 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.2, SA517 Gr.P.

SHH STEEL is a global steel mill sourcing partner with mill partnerships in China. We supply ASTM, ASME, EN and JIS steel to the USA, Europe, Middle East and Southeast Asia. Origin is mill-direct, China origin. We do not treat SA612 as an Asia-only stock item. Inquiry packages are written for fabricators and EPC buyers in Houston, Rotterdam, Antwerp, Jebel Ali, Dammam, Singapore and surrounding ports.

Typical trade terms:

• FOB Shanghai
• CIF Houston
• CIF Rotterdam
• CIF Jebel Ali
• Other CIF / CFR ports on request (Los Angeles, New York, Hamburg, Genoa, Jeddah, Mundra, Ho Chi Minh)

Typical lead time for ASME SA612 / ASME SA612M:

• Ex-stock / ready plate: about 5–7 days after order confirmation, subject to actual warehouse size and cutting
• Mill rolling, standard delivery: about 45 days
• Special heat treatment, 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, European or Middle East projects. Packing is seaworthy, with edge protection and marking in English as specified on the order.

If the buyer needs a dual ASTM A612 / ASME SA612 stamp for a Section VIII vessel in the United States, say so on the inquiry. If the buyer needs a PED / 3.2 file for Europe, 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 / EN / JIS steel to the USA, Europe, the Middle East and Southeast Asia. On ASME SA612 / ASME SA612M that means mill pricing, dual SA612/A612 marking, C-Mn-Si chemistry reported, tensile results to the correct thickness column, 345 MPa yield, 3.1 as standard and 3.2 when specified. Trade terms include FOB Shanghai and CIF Houston / Rotterdam / Jebel Ali.

We keep the specification name on the order. SA612 is not SA516 Grade 70. SA612 is not SA662. SA612 is not SA737. SA612 is not SA738. SA612 is not SA387 Gr.22 Cl.2. There is no SA612 Grade A, B or C in the Code book. If the drawing names normalize plus impact, we will not ship as-rolled and call it close.

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

ASME SA612 Steel Plate, also searched as ASME SA612M, SA-612 and A612 steel plate, is high-strength killed C-Mn-Si plate under ASME SA-612/SA-612M for moderate and lower temperature welded vessels. Whether the inquiry says ASME SA612, SA612 steel plate or A612, SHH STEEL as a global steel mill sourcing partner and steel manufacturer & exporter (mill-direct, China origin) supplies plate with the SA612 chemistry, 345 MPa yield, the correct thickness tensile column, and EN 10204 3.1 or 3.2 certification.

SHH STEEL supplies ASME SA612 / SA612 High Strength C-Mn-Si Vessel Plate to the USA, Europe, the Middle East and Southeast Asia for ASME Section VIII work that actually names this specification. FOB Shanghai / CIF Houston / Rotterdam / Jebel Ali.

Contact SHH STEEL for mill rolling, stock inquiry, dual SA612/A612 marking, impact testing, 3.2 inspection or a quotation.

ASME SA612 Steel Plate, ASME SA612M, SA612, A612 steel plate, SA-612, high strength C-Mn-Si vessel plate, global steel mill sourcing partner SHH STEEL