GOST 5520 17G1S Steel Plate | 17G1S Mn-Si Boiler & Pressure Vessel Plate

GOST 5520 17G1S Steel Plate is supplied for welded boilers and pressure vessels under GOST 5520-2017, Rolled non-alloy and alloy steel plates for boilers and pressure vessels. Specifications. The standard is in force, implemented in Russia on 1 October 2018, and replaced GOST 5520-79. This page uses the 2017 edition and its corrected tables, not the withdrawn 1979 tables.

17G1S uses a higher manganese range than 17GS. For thickness above 20 mm, Table 6 gives statistical-only entries for yield and elongation rather than numerical minima. It would be incorrect to fill those cells with structural-standard values or carry the thinner-band yield value upward.

A complete enquiry identifies the grade, thickness, delivery condition, inspection category and ultrasonic class. A grade name alone does not promise every test in the standard. Category 1 is chemistry-only in the base category matrix; other categories add specific tensile, bend, impact or elevated-temperature requirements.

SHH STEEL supplies this plate within the GOST 5520 range under Boiler & Pressure Vessel Steel Plates. We review the ordered category and delivery condition before quoting production and export requirements.

The same designation is also used under the HSLA structural standard: see GOST 19281 17G1S Steel Plate. That is not the same specification as GOST 5520 boiler and pressure-vessel plate; a structural certificate is not automatic pressure-equipment acceptance.

The following scope and ordering requirements come from the 2017 edition. The thickness range is a standard range, not a stock availability claim.

The following ladle-analysis limits are the 17G1S row of GOST 5520-2017 Table 2. A maximum sign means an upper limit, not a target addition. Values are mass percent.

Residual arsenic is limited to 0.08 %. Residual nitrogen is limited to 0.008 %, or 0.012 % for electric-furnace steel. Nitrogen up to 0.012 % is also permitted for other melting routes when the plate passes the required impact test after mechanical ageing, irrespective of the ordered category.

Table 2 permits niobium microalloying up to 0.05 %.

Aluminium and titanium microalloying are permitted up to 0.05 % Al and 0.03 % Ti.

Table 2 note 8 permits vanadium microalloying up to 0.10 %; the 0.05 % entry in the base row must be read with this permission.

Product-analysis deviations are separately defined in Table 3; they must not be used to widen the ladle-analysis order limits. Elements not listed in Table 2 may not be deliberately added without agreement. Any supplementary chemistry requirement must be written on the order.

The 17G1S data below are transcribed from GOST 5520-2017, not from GOST 19281 or a foreign vessel specification. Table 6 tensile tests are at room temperature, specified as 20°C with a +15/−10°C tolerance. The category matrix determines which characteristics are controlled.

Table 6 symbols: “+” means testing for statistical data with results recorded, not a numerical acceptance minimum; “−” means the characteristic is not specified or controlled. “**” values are used only by agreement and must be written on the order. Repeated thickness rows with a “**” tensile band represent alternatives, not cumulative limits.

Above 20 mm, yield, elongation, −40°C KCU and aged KCU are statistical-only entries. No numerical minimum is inserted here for those cells; confirm the project acceptance basis with the mill.

Clause 7.1.6.2 permits elongation adjustments below 8 mm and above 20 mm: a reduction of 1 percentage point per millimetre below 8 mm, or 0.25 percentage point per millimetre above 20 mm, with the latter reduction capped at 2 points relative to Table 6. Apply the clause to the ordered thickness; the table above retains the printed values.

V-notch impact, Table 8. KCV is impact toughness per ligament area in J/cm². It is not an absorbed-energy value in joules, and KCU and KCV are not interchangeable.

Table 8 applies through the ordered V-notch categories (19–22 and 24), restricted to categories permitted for the grade in Table 5. “+” is statistical-only; “−” is not specified. A single asterisk is retained from the source, whose note gives a historical non-rejection period ending on 1 January 2022. Do not treat starred values as an unconditional exemption from present acceptance requirements.

Impact testing at room and subzero temperatures is required for plate 12 mm and thicker when the category requires it; below 12 mm it is by purchaser request. For the carbon and Mn-Si grades, aged-impact testing is specified from 7 mm; below 7 mm it is on request with results recorded but not used for rejection. Specimen selection follows clause 9.8: full-size types from 10 mm and reduced-size types from 5 to under 10 mm, with the stated thickness-tolerance exceptions. One impact specimen may be 4.9 J/cm² below the table value. These are not permission to omit the ordered tests.

Elevated-temperature yield, Table 9. The temperature is a test condition, not a maximum service temperature or an allowable design stress.

All Table 9 numbers are minimum yield strength in MPa. “*” in this table has a different meaning from Tables 6 and 8: the starred value and its test require agreement and inclusion on the order. “−” means no requirement at that temperature. No interpolation or allowable-stress calculation is supplied.

180° bend, Table 7: 4–50 mm: d = 3.5a. Here d is mandrel diameter and a is specimen thickness. No tears, cracks or laminations are permitted at the bend.

Clause 7.1.5 supplies plate in the condition stated in the order. The standard lists normalizing, normalizing plus tempering, quenching plus tempering, tempering and annealing, including applicable processing from rolling heat; controlled rolling with or without accelerated cooling; controlled rolling followed by high tempering; and hot-rolled delivery without heat treatment.

This list does not mean that every 17G1S enquiry should default to one treatment. Select the condition with the vessel designer and mill to meet the ordered category. If the condition is not stated, the manufacturer determines it and records it in the quality document. Category 1 is hot-rolled in the base matrix; heat-treated or thermomechanically processed category 1 plate is an agreement option under clause 7.2.6.

The standard does not prescribe one universal normalizing, tempering or welding temperature for this grade on this page. Request the actual heat-treatment regime when the fabrication code requires it; clause 8.3 allows agreed reporting of that information. Fabrication heat treatments and simulated post-weld heat-treatment tests must be discussed before supply.

GOST 5520-2017 clause 7.1.7 states that weldability is ensured by chemical composition and manufacturing technology. This is not a qualified welding procedure for 17G1S. Welding consumables, preheat, interpass temperature, heat input and any post-weld heat treatment must follow the qualified procedure and the pressure-equipment design requirements.

Thickness, restraint, hydrogen level and the actual heat chemistry influence cracking risk. Matching a nominal carbon or manganese level is not enough to approve a procedure or substitute another steel.

Where the design needs weld or HAZ toughness at a particular temperature, specify it in the procedure qualification. Base-plate KCU or KCV results do not demonstrate the toughness of a completed weld.

Dimensions, thickness deviations and flatness follow GOST 19903. State plate size, manufacturing accuracy and flatness in the enquiry rather than treating the full Table 1 scope as a warehouse size list.

The standard prohibits cracks, rolled-in surface defects and laminations. Grinding or dressing must not take the plate below its permitted minimum thickness. Surface repair by welding is allowed only within clause 7.1.2.3 limits, with its inspection, thermal-treatment and reporting requirements; specify any project restriction on repair welding at enquiry stage.

Every plate is checked for dimensions, surface and edge quality, and ultrasonically examined. GOST 22727 continuity class 1, 2 or 3 is chosen on the order; there is no single universal class for every GOST 5520 grade. Mechanical specimens are transverse to rolling under clause 9.5 unless longitudinal testing is requested with the permitted acceptance adjustment.

Batch acceptance follows GOST 7566 and clauses 8–9. The quality document records the inspection category, delivery condition, test results and internal-defect examination; additional tests and any repair-weld information are reported where applicable. Heat/plate identification must remain traceable through cutting and shipment.

17G1S plate is specified for boiler and pressure-vessel shells, heads and welded components where the specified category supplies the required room-temperature, cold-temperature or elevated-temperature test evidence. Suitability for a particular temperature, pressure and wall thickness is established by the design code and ordered tests, not by a generic boiler-plate label.

Room-temperature tensile tests and elevated-temperature yield tests do not themselves establish creep life or an allowable operating temperature. Those limits belong in the engineering design and project material specification.

Edition note. Order GOST 5520-2017 explicitly. GOST 5520-79 is the replaced edition; an older designation or catalogue table is not proof that the current category, chemistry and testing requirements have been met.

For non-pressure structural work, review GOST 19281 17G1S Steel Plate separately. It uses the same designation under the HSLA structural standard, not the same specification as 5520 boiler and pressure-vessel plate. No structural-standard properties have been carried into the tables above.

Related standard ranges include GB/T 713, EN 10028-2 and ASTM A516. These are routes for a design review, not substitute certificates.

The other twelve grades in the GOST 5520 range are linked below so a buyer can compare the specified product, not just its name. They are related, not equivalent. Thickness and category entries are from GOST 5520-2017 Tables 1 and 5.

No formal equivalence has been verified for the products below. They are related, not equivalent, and are linked for a purchasing/design comparison only. A cross-reference chart cannot replace review of the two complete specifications.

A similar tensile class or intended use does not establish equal impact testing, delivery condition or elevated-temperature acceptance. Confirm the project design-code route and all supplementary requirements before substitution.

• SHH STEEL produces and exports 17G1S boiler and pressure-vessel plate to the ordered specification
• We check the 4–50 mm Table 1 scope and ordered category rather than quote one generic 4–160 mm range for every grade
• The quotation separates delivery condition, ultrasonic class and category-specific testing
• We keep GOST 5520-2017 data separate from the replaced edition and from foreign and structural standards
• We review traceability, inspection documents, cutting and export requirements before confirming the order

Send the drawing or material schedule with the following details. Production feasibility, dimensions, documentation and delivery are confirmed against the enquiry.

Contact SHH STEEL for a quotation for GOST 5520-2017 17G1S boiler and pressure-vessel plate. Send thickness, width, length, quantity, destination and the project material specification.

Specify the delivery condition and inspection category, required KCU/KCV temperatures and acceptance criteria, any elevated-temperature yield test, and the GOST 22727 ultrasonic class. Include PWHT or simulated PWHT, supplementary testing and the quality-document requirement.

If a related grade or another standard is being considered, send the design requirements for review. We do not assume interchangeability or dual certification from a grade comparison alone.

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