Shandong Kungang Metal Technology
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Hot rolled plate & coil

Hot rolled steel plate

Flat plate for structural fabrication and industrial components. Specify the grade, thickness and cutting dimensions for your application.

Product form
Plate
Surface / finish
Hot rolled
Grade / standard
Q235B, ASTM A36 or S355JR; specify the required grade
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Product details

Flat plate for structural fabrication and industrial components. Specify the grade, thickness and cutting dimensions for your application.

Supply availability and the final specification are confirmed in the quotation. Please include the intended application, dimensions, quantity and destination when contacting us.

Cutting & fabrication

Specify the final plate size and downstream cutting or welding process.

Thickness & flatness

Define nominal thickness and the tolerances your fabrication requires.

Material documentation

Match the requested material standard with the inspection document.

Typical application

Structural fabrication

Structural fabrication, equipment and general plate work.

Explore applications

Product specifications

Product specifications for Hot rolled steel plate
Product formPlate
Grade / standardQ235B, ASTM A36 or S355JR; specify the required grade
Thickness1.5–200 mm
Width600–4,000 mm
Manufacturing processHot rolled
SurfaceAs-rolled steel surface with oxide scale
Cut length1,000–12,000 mm; custom cut lengths by agreement
Dimensional tolerancesTo the agreed grade, standard and order specification
Order quantity & availabilityConfirmed for the selected specification in the quotation
Edge conditionMill edge or trimmed edge, confirmed with the order
Inspection documentRequest heat / coil identification and material test results
PackagingMoisture protection, steel strapping and agreed edge protection
Dispatch documentsPacking list and product identification matched to the order
Delivery conditionAs rolled; normalized or other grade-permitted condition when specified

Ranges vary with grade, finish and order specification. Confirm the required dimensions, coating and availability in your quotation.

Structural grades — chemical composition

GradeC max. %Mn max. %Si max. %P max. %S max. %
Q235B / GB/T 7000.201.400.350.0450.045
S355JR / EN 10025-20.241.600.550.0350.035

Q235B carbon may be agreed up to 0.22%. Product analysis, thickness and other element requirements depend on the ordered standard. The grades are not interchangeable.

Structural grades — strength and impact

GradeThickness basisYield min. (MPa)Tensile (MPa)Impact designation
ASTM A36Plate ≤200 mm250400–550Only when supplementary impact testing is ordered
Q235B≤16 mm235370–50027 J at +20°C, subject to standard exemptions
S355JR>3–16 mm355470–63027 J at +20°C

Yield strength decreases at larger thickness for Q235B/S355JR. Specify thickness, specimen orientation and test requirements; do not apply this thin-plate row to all gauges.

Grade-specific technical data

Select a grade to view its composition, mechanical properties and applicable test conditions.

ASTM A36

ASTM A36 plate — heat analysis

Plate thickness (in.)C max. %Mn %P max. %S max. %
≤⅜0.25Not specified0.040.05
>⅜–1½0.250.80–1.200.040.05
>1½–2½0.260.80–1.200.040.05
>2½–40.270.85–1.200.040.05
>40.290.85–1.200.040.05

Plate chemistry reproduced on the supplier’s inch-based thickness bands. Copper, when copper-bearing steel is ordered: 0.20% minimum. Silicon and other requirements follow the ordered specification.

ASTM A36 — mechanical properties

PropertyMetricImperial
Tensile strength400–550 MPa58,000–79,800 psi
Yield strength, minimum250 MPa36,300 psi
Elongation, 200 mm / 8 in. gauge length20%20%
Elongation, 50 mm / 2 in. gauge length23%23%

ASTM A36 only. Elongation depends on specimen gauge length, product dimensions and the ordered specification; values do not apply to Q235B or EN grades.

ASTM A36 — physical and elastic properties

PropertyMetricImperial
Density7.85 g/cm³0.284 lb/in³
Elastic modulus200 GPa29,000 ksi
Bulk modulus140 GPa20,300 ksi
Poisson’s ratio0.2600.260
Shear modulus79.3 GPa11,500 ksi

Typical room-temperature reference properties, not additional guaranteed acceptance tests. Apply to A36 material only.

A633

Mechanical properties — supplier grade table

A633Yield StrengthTensile StrengthElongation 200mm, min%Elongation 50mm, min%
65mm65-100mm100-150mm65mm65-100mm100-150mm
Grade A290290-430-570430-570-1823
Grade C&D345315-485-620450-590-1823
Grade E415415380550-690550-690515-6551823

Product-matched supplier reference. Heat treatment, thickness and test orientation must match the purchase specification.

ASTM A572 grades 42 / 50 / 60 / 65

A572-S355JR — chemical composition (%)

A572CMnPSSi
Grade420.211.350.030.030.15～0.4
Grade500.231.350.030.030.15～0.4
Grade600.261.350.030.030.40
Grade650.23～0.261.35～1.650.030.030.40

Grade-specific supplier reference. Preserve the stated thickness and heat/product-analysis basis; ranges are not interchangeable with a single maximum. Confirm the ordered standard edition and material certificate.

Mechanical properties — supplier grade table

A572Yield Strength(Ksi)Tensile Strength(Ksi)Elongation %8 inches
Grade42426020
Grade50506518
Grade60607516
Grade65658015

Product-matched supplier reference. Heat treatment, thickness and test orientation must match the purchase specification.

A572-S355JR — physical properties

Physical PerformanceMetricImperial
Density7.80g/cc0.282 lb/in³

Typical reference density, not a guaranteed mechanical acceptance value.

ASTM A283

Mechanical properties — supplier grade table

A283Tensile StrengthYield Strength min.Elongation Rate8 InchesElongation Rate2 Inches
GradeA45000-60000psi310-415MPa24000psi165MPa27%min.30%min.
GradeB50000-65000psi345-450MPa27000psi185MPa25%min.28%min.
GradeC55000-75000psi380-515MPa30000psi205MPa22%min.25%min.
GradeD60000-80000psi415-550MPa33000psi230MPa20%min.23%min.

Product-matched supplier reference. Heat treatment, thickness and test orientation must match the purchase specification.

A514

Mechanical properties — supplier grade table

A514Thickness mmYield Strength Min MpaTensile Strength MpaElongation Rate Min%
20690760-89518
20-65690760-89518
65-150620690-89518

Product-matched supplier reference. Heat treatment, thickness and test orientation must match the purchase specification.

ASTM A656

A656-S355J2 — chemical composition (%)

A656CMnPSSiVNNb
Type30.181.650.0250.0350.600.080.0200.008～0.10
Type70.181.650.0250.0350.600.150.0200.10max

Grade-specific supplier reference. Preserve the stated thickness and heat/product-analysis basis; ranges are not interchangeable with a single maximum. Confirm the ordered standard edition and material certificate.

Mechanical properties — supplier grade table

A656Yield Strength MpaTensile Strength MpaElongation 200mm,%Elongationin 50mm,%
Grade50345415485550
Grade60415485550650
Grade7020171412
Grade8023201715

Product-matched supplier reference. Heat treatment, thickness and test orientation must match the purchase specification.

A656-S355J2 — physical properties

Physical PerformanceMetricImperial
Density7.80g/cc0.282 lb/in³

Typical reference density, not a guaranteed mechanical acceptance value.

ASTM A709

Mechanical properties — supplier grade table

A709ThicknessmmYield StrengthminTensile StrengthminElongation%
200mm50mm
36≤100250400-5502023
50≤1003454501821
50S-345-450450--
50W, HPS50W≤1003454851821
HPS70W≤100485585-760-19
100, 100W, HPS100W≤ 65690760-895-18
100, 100W65-100620690-895-16

Product-matched supplier reference. Heat treatment, thickness and test orientation must match the purchase specification.

S235-S275-S355

EN 10025-2 — chemical composition (%)

BrandCSi maxMn maxP maxS maxN maxCu max
≤ 1616-40>40
S235JR0.170.170.20-1.400.0350.0350.0120.55
S275JR0.210.210.22-1.500.0350.0350.0120.55
S275J00.180.180.18-1.500.0300.0300.0120.55
S275J20.180.180.18-1.500.0250.025-0.55
S355JR0.240.240.240.551.600.0350.0350.0120.55
S355J00.200.200.220.551.600.0300.0300.0120.55
S355J20.200.200.220.551.600.0250.025-0.55

Use the selected grade and thickness column. A dash is not a zero value; the ordered standard and test certificate govern acceptance.

EN 10025-2 — tensile strength (MPa)

Thickness mmTensile Strength
≤33-100100-150150-250250-400
S235JR360-510360-510350-500340-490-
S275JR430-580410-560400-540380-540-
S275J0430-580410-560400-540380-540-
S275J2430-580410-560400-540380-540-
S355JR510-680470-630450-600450-600-
S355J0510-680470-630450-600450-600-
S355J2510-680470-630450-600450-600450-600

Use the selected grade and thickness column. A dash is not a zero value; the ordered standard and test certificate govern acceptance.

EN 10025-2 — minimum yield strength (MPa)

Thickness mmYield Strength
≤ 1616-4040-6363-8080-100100-150150-200200-250250-400
S235JR235225215215215195185175-
S275JR275265255245235225215205-
S275J0275265255245235225215205-
S275J2275265255245235225215205195
S355JR355345335325315295285275-
S355J0355345335325315295285275 
S355J2355345335325315295285275265

Use the selected grade and thickness column. A dash is not a zero value; the ordered standard and test certificate govern acceptance.

ST37-ST52

ST37-ST52 — chemical composition (%)

Brand  CP  S  N  
≤ 16mm16-32mm32-40mm40-63mm63-100mm
St37-20.170.200.200.200.200.0500.0500.009
USt37-20.170.200.200.200.200.0500.0500.007
RSt37-20.170.170.170.200.200.0500.0500.009
St37-30.170.170.170.170.170.0400.040-
St52-30.2040.2040.220.220.220.0400.040-

Grade-specific supplier reference. Preserve the stated thickness and heat/product-analysis basis; ranges are not interchangeable with a single maximum. Confirm the ordered standard edition and material certificate.

Mechanical properties — supplier grade table

BrandTensile StrengthYield Strength
 <3mm3-100mm≤ 16mm16-40mm40-63mm63-80mm80-100mm
St37-2360-510340-470235225215205195
USt37-2       
RSt37-2  235225215215215
St37-3       
St52-3510-680490-630365355345335325

Product-matched supplier reference. Heat treatment, thickness and test orientation must match the purchase specification.

SS400-SS490-SS540

SS400-SS490-SS540 — chemical composition (%)

BrandCarbonManganesePhosphorusSulphur
SS400--0.050max0.050max
SS490--0.050max0.050max
SS5400.30 max1.60 max0.040 max0.040 max

Grade-specific supplier reference. Preserve the stated thickness and heat/product-analysis basis; ranges are not interchangeable with a single maximum. Confirm the ordered standard edition and material certificate.

Mechanical properties — supplier grade table

BrandYield StrengthTensile Strength
 ≤ 1616-4040-100>100-
SS400245235215205400-510
SS490285275255245490-610
SS540400390--540

Product-matched supplier reference. Heat treatment, thickness and test orientation must match the purchase specification.

Q235B / GB/T 700-2006

Q235B — chemical composition (heat analysis)

C max. %Si max. %Mn max. %P max. %S max. %
0.200.351.400.0450.045

GB/T 700-2006, as reproduced in the PolyU Chinese Steel Guide, Appendix C. Carbon up to 0.22% is permitted only by agreement with the purchaser.

Q235B — mechanical properties by plate thickness

Thickness t (mm)Yield ReH min. (MPa)Tensile Rm (MPa)Elongation A min. (%)
≤16235370–50026
>16–40225370–50026
>40–60215370–50025
>60–100215370–50024
>100–150195350–50022
>150–200185350–50021

GB/T 700-2006. For thickness over 100 mm, the lower tensile limit may be reduced by 20 MPa. For wide strip and plate cut from it, the tensile upper limit is not an acceptance requirement. Use the test piece and orientation required by the ordered standard.

Q235B — impact and delivery condition

ItemRequirement
Quality classB
Charpy V-notch test temperature+20°C
Impact energy27 J minimum, standard test basis
Thin material exceptionFor thickness <25 mm, omission of impact testing requires the supplier guarantee and purchaser agreement allowed by the standard
DeliveryHot rolled; controlled rolling or normalized delivery where specified in the order

The impact requirement is specific to Q235B; do not substitute values from Q235A, Q235C or Q235D.

Q235B — 180° cold-bend requirements

Thickness a (mm)Longitudinal mandrel diameter dTransverse mandrel diameter d
≤601.0a1.5a
>60–1002.0a2.5a
>100By agreementBy agreement

a is specimen thickness; bend specimen width is 2a. Test requirements and sampling follow GB/T 700-2006.

Q275B / GB/T 700-2006

Q275B — chemical composition

C max. %Si max. %Mn max. %P max. %S max. %
0.210.351.500.0450.045

Carbon maximum may increase to 0.22% for thickness over 40 mm.

Q275B — mechanical properties

Thickness (mm)Yield min. (MPa)Tensile (MPa)A min. (%)
≤16275410–54022
>16–40265410–54022
>40–60255410–54021
>60–100245410–54020
>100–150225390–54018
>150–200215390–54017

GB/T 700-2006. For thickness over 100 mm, the lower tensile limit may reduce by 20 MPa. Q275B impact reference: 27 J at +20°C.

Surface & processing requirements

Include the downstream process in your enquiry so that the material, dimensions and surface can be reviewed together.

Cut-to-size requirementsFinal length and width, cutting method and edge condition.
Forming / fabricationDescribe the downstream forming, pressing, profiling or fabrication operation.
Finishing requirementsState whether material will be painted, coated or otherwise finished after delivery.
Plate / sheet handlingConfirm lifting method, stack height and protection of edges and surfaces.

Production & processing

Define the material and the downstream process together. Cutting, slitting or finishing requirements should form part of the order specification.

Material review

Grade, dimensions and surface requirements are checked against the enquiry.

Processing scope

Agree cutting, slitting or forming requirements and the finished product tolerances.

Order inspection

Define acceptance criteria, identification and the requested documentation.

Rolling, processing and production facilities
Rolling, processing and production facilities
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Stock & warehouse

Hot rolled, galvanized and color coated material in warehouse settings. Ask our team to confirm current availability for your grade, dimensions and quantity.

Plate and sheet stock in covered storage
Plate and sheet stock in covered storage

Quality inspection & documentation

Agree the acceptance criteria and required documents before confirming your order.

  • Material identificationGrade, standard and requested test documentation.
  • Dimensions & surfaceThickness, width, finish and agreed tolerances.
  • Order documentsProduct identification, packing list and inspection scope.
Quality requirements
Coordinate measuring equipment
Coordinate measuring equipment
Ultrasonic thickness measurement
Ultrasonic thickness measurement
Hardness testing
Hardness testing
Tensile testing equipment
Tensile testing equipment
Chemical analysis laboratory
Chemical analysis laboratory
Metallographic examination
Metallographic examination

Packaging & shipment

Tell us how the material will be transported, unloaded and stored. Specify moisture protection, edge protection, package weight and destination with your enquiry.

Protective packing, loading and export shipment
Protective packing, loading and export shipment
ProtectionMoisture barrier, edge protection and surface protection as agreed.
Unit weightSpecify the coil or bundle weight for your unloading equipment.
IdentificationProduct, grade, dimensions and order reference on the agreed packing list.
DeliveryConfirm destination, transport method and delivery terms in the quotation.

Certificates & verification documents

Request the original document issued for the supplying company, product scope and order. Material test reports and conformity documents are checked against the named holder, issuing body and validity period.

Material test reportHeat or coil number, ordered grade, chemical composition and mechanical test results.
Inspection documentSpecify the required EN 10204 document type and inspection scope in the enquiry.
Conformity documentsRequest an original copy showing the issuing body, holder, number, applicable scope and validity.
Request applicable documents

Frequently asked questions

What should I include in my enquiry?

Send the product, grade or standard, dimensions, quantity, required finish and destination. Describe the end use if the specification is still being developed.

Can I request a particular size or finish?

Yes, include your required size and finish in the enquiry. Availability and any processing requirements must be confirmed in the quotation.

How are minimum order and lead time confirmed?

They depend on grade, dimensions, processing and quantity. We confirm them for the particular order rather than publish one figure for every product.

What documents should I request?

State the material test document, inspection scope and other purchasing documents required for your project. Agree these with the order.

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