St3sp/ps · Q235B · t 1.5–100 · 1 500×6 000 · GOST 19903
Hot-rolled plate St3
Hot-rolled plate of ordinary-quality carbon steel for steel structures, tanks and machine building
09G2S · Q355B · t 2–50 · 1 500×6 000 · GOST 19281
Plate 09G2S
Low-alloy hot-rolled plate of increased strength for structures operating at low temperatures
- GOST 19281-2014
- GOST 19903-2015
- GB/T 1591-2018
- GB/T 3274-2017
- EN 10025-2:2019
- ASTM A572/A572M
- 09G2S
- Q355B
- Q345B
- S355JR
- S355J2
- A572 Grade 50
Section
Key parameters
- Thickness
- 2–50 mm; other thicknesses — to specification
- Width
- 1 250, 1 500, 2 000, 2 500 mm
- Length
- 6 000 and 12 000 mm; fixed length — to specification
- Steel grade
- 09G2S; Q355B; S355JR / S355J2
- Category
- 12 (impact bending at −40 °C) or 15 (at −70 °C) per GOST 19281
- Edge
- trimmed edge (O) or mill edge (NO)
- Surface
- hot-rolled with mill scale; shot blasting and primer — to specification
Sizes and weight
Pick a size in the table: each row has a quantity field in tonnes and an “Add to specification” button. Rows from several items go out as one request.
Calculate for your volume
The same formula as the table below: metres to tonnes and tonnes to metres.
—kg per metre
—total, t
—metres per tonne
Formula
| t, mm | Weight, kg/m² | Sheet 1 500×6 000, kg | Add to specification |
|---|---|---|---|
| 2 | Weight, kg/m²15.7 | Sheet 1 500×6 000, kg141.3 | Add to specification |
| 3 | Weight, kg/m²23.5 | Sheet 1 500×6 000, kg211.9 | Add to specification |
| 4 | Weight, kg/m²31.4 | Sheet 1 500×6 000, kg282.6 | Add to specification |
| 5 | Weight, kg/m²39.3 | Sheet 1 500×6 000, kg353.3 | Add to specification |
| 6 | Weight, kg/m²47.1 | Sheet 1 500×6 000, kg423.9 | Add to specification |
| 8 | Weight, kg/m²62.8 | Sheet 1 500×6 000, kg565.2 | Add to specification |
| 10 | Weight, kg/m²78.5 | Sheet 1 500×6 000, kg706.5 | Add to specification |
| 12 | Weight, kg/m²94.2 | Sheet 1 500×6 000, kg847.8 | Add to specification |
| 14 | Weight, kg/m²109.9 | Sheet 1 500×6 000, kg989.1 | Add to specification |
| 16 | Weight, kg/m²125.6 | Sheet 1 500×6 000, kg1 130 | Add to specification |
| 20 | Weight, kg/m²157.0 | Sheet 1 500×6 000, kg1 413 | Add to specification |
| 25 | Weight, kg/m²196.3 | Sheet 1 500×6 000, kg1 766 | Add to specification |
| 30 | Weight, kg/m²235.5 | Sheet 1 500×6 000, kg2 120 | Add to specification |
| 40 | Weight, kg/m²314.0 | Sheet 1 500×6 000, kg2 826 | Add to specification |
| 50 | Weight, kg/m²392.5 | Sheet 1 500×6 000, kg3 533 | Add to specification |
Plate mass per m² is 7.85·t, where t is the thickness in mm; sheet mass is for the 1 500×6 000 mm format.
Theoretical weight at steel density 7.85 g/cm³. Actual batch weight is by scale and mill certificate.
Description
09G2S is a low-alloy structural steel of increased strength to GOST 19281-2014: carbon up to 0.12 %, manganese 1.3–1.7 %, silicon 0.5–0.8 % to GOST 19281. The plate is hot-rolled to the dimensions of GOST 19903-2015: thin sheet from coil cut to length, heavy plate on reversing mills from a slab. Manganese and silicon give a strength above that of St3 while weldability is retained, so 09G2S is used where the weight of a structure has to be reduced or service in frost has to be ensured.
Details
The strength class to GOST 19281 depends on thickness and is stated in the certificate. The steel category sets the impact test conditions: category 12 — at −40 °C, category 15 — at −70 °C; for structures in Uzbekistan category 12 is usually sufficient, cryogenic and northern equipment calls for 15. The Chinese equivalent is Q355B to GB/T 1591-2018 (Q345B before 2018) with a yield strength of 355 MPa minimum and an impact test at +20 °C; the European one is S355JR, S355J2 to EN 10025-2, the American one A572 Grade 50. These are the nearest equivalents by strength, not identity: if the project specifies a 09G2S category for impact toughness, we agree with the mill rolling and testing to GOST and a corresponding entry in the certificate.
At the mill before shipment the bureau's inspector measures thickness with a micrometer at several points of the sample sheets and checks it against the tolerance of the standard, checks width, length and flatness, and examines the surface for laminations, laps and delamination along the cut edge. The mill test certificate (MTC) is checked against the tag and marking by heat number; in the composition the manganese and silicon content is checked against the limits of GOST 19281, in the mechanical properties — yield strength, tensile strength, elongation and impact toughness at the temperature set by the category. The report with photographs is handed to you before shipment.
Applications
- load-bearing welded steel structures, trusses and columns
- bridge and crane girders
- pressure vessels and apparatus to the codes of the project
- frames and bodies of mining and road machinery
- oil and gas field equipment operating at sub-zero temperatures
- trestles, pipeline supports and cooling towers
Packing and shipment
Bundles on timber bearers, strapped with steel band, every sheet marked with paint: grade, heat, thickness; mill tag with batch number and category.
Grade equivalents
Equivalents are the nearest, not identical: the exact grade and standard are written into the contract.
| GOST | GB (China) | ASTM | EN | Note |
|---|---|---|---|---|
| St3sp / St3ps | GB (China)Q235B | ASTMA36 | ENS235JR | NoteNearest equivalents. Q235B and S235JR specify impact toughness at +20 °C, GOST 14637 by category; A36 has a higher yield strength, 250 MPa. |
| 09G2S | GB (China)Q355B (Q345B before 2018) | ASTMA572 Grade 50 | ENS355JR / S355J2 | NoteNearest equivalents by strength. The 09G2S category for impact toughness at −40 or −70 °C is specified separately; Q355B is tested at +20 °C. |
| 08ps | GB (China)DC01 | ASTMA1008 CS Type B | ENDC01 | NoteSPCC to JIS G3141 is the same class of general-purpose cold-rolled low-carbon steel. |
| 08ps to GOST 14918 | GB (China)DX51D+Z | ASTMA653 CS Type B | ENDX51D+Z | NoteThe DX51D+Z designation in GB/T 2518 matches EN 10346. Zinc coating weight (Z100–Z275) is specified separately from the grade. |
| GOST 34180 based on 08ps | GB (China)TDC51D+Z | ASTMA755 based on A653 | ENDX51D+Z to EN 10169 | NoteThe grade describes the steel substrate and the zinc. Type and thickness of the polymer layer, RAL colour and environment class are set by the specification. |
| 08Kh18N10 | GB (China)06Cr19Ni10 | ASTM304 | EN1.4301 (X5CrNi18-10) | Note12Kh18N10T is the equivalent of titanium-stabilised grade 321, not of 304. |
| 03Kh18N11 | GB (China)022Cr19Ni10 | ASTM304L | EN1.4307 (X2CrNi18-9) | NoteLow-carbon version of 304 (carbon up to 0.03 %) for welded structures without subsequent heat treatment. |
| 03Kh17N14M3 | GB (China)022Cr17Ni12Mo2 | ASTM316L | EN1.4404 (X2CrNiMo17-12-2) | NoteMolybdenum 2–3 % to ASTM A240. Mills in China certify to ASTM or EN; the GOST grade is entered in the MTC on request as an equivalent. |
Equivalents are the closest match, not identical: chemistry and tolerances differ between standards. The exact grade and standard are written into the contract.
The batch is checked against the order at the mill before shipment: sizes, markings, heat numbers on the certificate and tags, packing
Documents
What arrives with the steel
01
Mill test certificate (MTC)
Heat number, chemical composition, mechanical properties and standard for every heat in the batch.
02
Photo-documented inspection report
Measurements, markings, packing, weighing and bundle numbers, drawn up at the mill before shipment.
03
Specification and packing list
Items, sizes, quantities and mass by bundle: what the warehouse acceptance is checked against.
04
Certificate of origin
Confirms the mill and country of manufacture for customs clearance.
Related items
St3 · Q235B · teardrop / diamond · t 2.5–12 · 1 500×6 000 · GOST 8568
Chequered plate
Hot-rolled plate with lentil or diamond pattern for platforms, stair treads and floors with a non-slip surface
Buyer questions
How to read a mill test certificate for sheet
In the certificate (MTC) the mill states the standard and grade, heat number, thickness and format, chemical composition of the heat, mechanical test results and batch number. We check the heat number against the tag on every bundle and the marking on the sheets, and the composition and properties against the requirements of the standard named in the specification. A certificate without a heat number, or with a composition outside the limits of the standard, is grounds for not accepting the batch.
How St3sp differs from St3ps and from Q235B
St3sp is killed steel, fully deoxidised; St3ps is semi-killed. For welded structures and service at sub-zero temperatures St3sp with a category to GOST 14637 is usually specified. Q235B is the Chinese grade of the same class with a yield strength of 235 MPa minimum and an impact test at +20 °C. A mill in China issues the certificate to GB/T 700 or, under contract, rolls the plate to GOST requirements and states this in the MTC.
How sheet tonnage is calculated
Theoretical weight per square metre is 7.85 kg for every millimetre of thickness; the weight of a sheet is thickness multiplied by area and by 7.85. Actual weight differs because of the thickness tolerance: a minus tolerance makes the batch lighter than theoretical. In the specification we fix which weight the batch is settled by — theoretical or actual by weighing at the mill — and the same weight goes into the packing list.
What is checked during inspection at the mill
Thickness with a micrometer at several points of every sample sheet, width and length with a tape, flatness and squareness of cut, surface for laminations, laps and scale, marking and tags, certificate by heat and composition, packaging. For coated products — zinc or polymer thickness with a coating gauge; for stainless steel — a composition check with a portable analyser. The result is a report with photographs before shipment.
How a batch is calculated
The batch is calculated for your volume — send the specification: grade and standard, thickness, sheet format, coating and surface, quantity in sheets or tonnes, certificate requirements. From the specification we find a producing mill, agree the rolling and packaging terms and reply with a calculation.
Price request
Send your specification and we will quote your batch
Price depends on grade, size, tonnage and delivery terms on the day of contract.
Request received