Q195 Q215 Q235 Q255 Q275 mild steel Hot Rolled Coil

Strict quality control system and perfect after-sales service system are always our top concern which can guarantee and track the quality of our products from raw materials procurement, production processes, finish products as well as after-sales service.

Customization

Test:SGS or Third- party test

Delivery: 5-7days after deposit

More Details

Q represents the yield limit of this material. The following 235 refers to the yield value of this material, which is about 235MPa.

And the yield value decreases with the increase of the thickness of the material (thickness/diameter ≤16mm, yield strength is 235MPa; 16mm< plate thickness/diameter ≤40mm, yield strength is 225MPa; 40mm< plate thickness/diameter ≤60mm, yield strength is 215MPa; 60mm< plate thickness/diameter ≤100mm, yield strength is 205MPa; 100mm< plate thickness/diameter ≤150mm, yield strength is 195MPa; 150mm< plate thickness/diameter ≤200mm, yield strength is 185MPa).

Because the carbon content is low, the comprehensive performance is better, the strength, plasticity and welding performance is better match, the most widely used.

Technical Parameter

 Chemical Composition%

Grade

C

Mn

Si

S

P

Q235A

≤0.22

≤1.4

≤0.35

≤0.05

≤0.045

Q235B

≤0.20

≤1.4

≤0.35

≤0.045

≤0.045

Q235C

≤0.17

≤1.4

≤0.35

≤0.030

≤0.040

Q355D

≤0.17

≤1.4

≤0.35

≤0.035

≤0.035

Q235A, Q235B, Q235C, Q235D different grades represent, mainly is the impact of the temperature is different.

A means no impact, B is above 20 degrees, C is above 0 degrees, D-20 degrees,

A to D is different, refers to their performance in the impact temperature difference. Respectively: Q235A, is not required for impact toughness test; Q235B is used for impact toughness test at room temperature (20℃); Q235C is used for 0℃ impact toughness test; Grade Q235D is for impact toughness test at -20℃.

Charpy V notch specimens were used in the impact toughness test. The impact toughness index is Akv. For grade B, C and D steel, Akv≥27J is required under different temperature requirements. The impact value is also different at different impact temperatures.

 

Conventional Parameters

Width

500-3000 mm

Thickness

0.2-4 mm

Tolerance

±0.5%

Alloy or Not

Alloy

Processing Service

Welding, Punching, Cutting, Bending, Decoiling

Payment term

T/T (30% Deposit)

MOQ

5Tons

Packing

Standard Sea-worthy Packing

Standard

EN,GB,ASTM,JIS,DIN,etc.

Usage

 1. Q235 Widely used in buildings and engineering structures. It is used for making steel bars or building workshop frames, high voltage transmission towers, Bridges, vehicles, boilers, containers, ships, etc., and also a large number of mechanical parts with low performance requirements. C, D grade steel can also be used for some professional steels.

2. Can be used for all kinds of mold handle and other unimportant mold parts.

3. Using Q235 steel as punch material, after quenching without tempering directly used, hardness of 36~40HRC, to solve the phenomenon of broken punch in use.

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