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Q235

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Data Table for:Steel Grades:Structure Steel:Q235

Chemical composition % of the ladle analysis of grade Q235

0.14~0.22 ≤0.30 0.30~0.65 ≤0.045 ≤0.050 ≤0.30 ≤0.30 ≤0.30

Mechanical properties of grade Q235

Technological properties of grade Q235

Hardness and heat treatment specification of grade Q235
salt-bath furnace controlled atmosphere furnace
235 262 788 1191 1204 5~15 air cooling 522 60
longitudinal horizontal
Hot-rolled/Cold rolling:5 - 150 520 415 16~18 2a 3.5a
Note:
(1) listed in the table apex diameter (d), to steel thickness (a) multiples said.
(2) in the ASTM A6 standard specified scope can meet any additional conditions.
(3) from the standard for 50 mm (2 in).
Mechanical properties
Mechanische Eigenschaften
Caracteristiques mecaniques
ReH Minimum yield strength / Mindestwert der oberen Streckgrenze / Limite d’elasticite minimale
Rm Tensile strength / Zugfestigkeit / Resistance a la traction
A Minimum elongation / Mindestwert der Bruchdehnung / Allongement minimal
J Notch impact test / Kerbschlagbiegeversuch / Essai de flexion par choc
Q235 steel description:

Step Shaft: steel plate/sheet,coil,round bar,flat bar,tube/pipe,Profiled forgings

Q235 steel Specifications or Size:

Round bar:
Diameter : 1mm-2000mm

Square bar:
Size: 50mm * 50mm-600mm *600mm

Plate steel/flat bar:
Size: Thickness: 0.1mm-800mm Width: 10mm to 1500mm

Tube/pipe:
Size: OD: 6-219mm WT: 1-35 mm.

Cold-rolled sheet: Thickness: 2-5mm Width:1000mm Length: 2000mm

Hot-rolled sheet: Thickness:6-80mm Width: 210-610mm

Length: We can supply any length based on the customer's requirement.

Forging/hot rolling/ extrusion of steel.

Forging: Shafts with flanks/pipes/tubes/slugs/donuts/cubes/other shapes

Finished goods condition: hot forging/hot rolling + annealing/normalizing + tempering/quenching + tempering/any conditions based on the customer's requirement

Surface conditions: scaled (hot working finish)/ground/rough machining/fine machining/based on the customer's requirement

Furnaces for metallurgical processing: electrode arc + LF/VD/VOD/ESR/Vacuum consumable electrode.

Ultrasonic inspection: 100% ultrasonic inspection for any inperfections or based on the customer's requirement.

UTS according to SEP 1921 C/c,D/d,E/e;A388 or GB/T 6402

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Mechanics performance


The yield point σ s/MPa (no less) than in steel different thickness or diameter/mm | ≤ 16:235
The yield point σ s/MPa (no less) than in steel different thickness or diameter/mm | > 16 ~ 40:225
The yield point σ s/MPa (no less) than in steel different thickness or diameter/mm | > 40 to 60:215
The yield point σ s/MPa (no less) than in steel different thickness or diameter/mm | > 60 ~ 100:205
The yield point σ s/MPa (no less) than in steel different thickness or diameter/mm | > 100 ~ 150:195
The yield point σ s/MPa (no less) than in steel different thickness or diameter/mm | > 150:185

Cold bending property


Sample direction: vertical
180 ° of cold bending test b = 2 a different thickness or in steel diameter/mm | than 60: d = a
180 ° of cold bending test b = 2 a different thickness or in steel diameter/mm | > 60 ~ 100: d = 2 a
180 ° of cold bending test b = 2 a different thickness or in steel diameter/mm | > 100 ~ 200: d = 2.5 a

Performance characteristics and applications


Good strength and cold, heat pressure processing performance sex and welding is a bit poor performance.
Widely used in the manufacture of sheet, steel bar, steel structure with all kinds of steel, building structure, Bridges, engine, mechanical parts, carburizing or carbon nitrogen were permeability parts, components, support, force not big pole, connecting rod, pin, shaft, screw, nut, rings, etc
 

 

GB/T 700-1988 standard and GB 700-1979 standard steel grade comparison

GB/T 700-1988 standadr:

Regardless of rank, the chemical composition and mechanical properties (σ s, σ b, the delta and the cold bending) are to be guaranteed

Rolling plate and rod of products, the mechanical properties of the guarantee condition, can according to product characteristics and application requirements, in the standard separately

GB 700-1979 standard

A1 the mechanical properties of the steel guarantee (σ s, σ b, the delta and the cold bending), B1 steel guarantee the chemical composition of the same with Q195

A1 steel cold bending test is additional guarantee conditions

1 no special steel of steel



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