Product introduction
◆ Standards
| Q235 Steel | GB/T 700 | ASTM | DIN EN 10025 | JIS | NF EN10025 | BS | ISO630 |
| Q235A | Gr.D | SS440 SM400A | 080A15 | E235B | |||
| Q235B | Gr.D | S235JR S235JRG1 S235JRG2 | S235JR S235JRG1 S235JRG2 | 080A15 S235JR S235JRG1 S235JRG2 | |||
| Q235C | Gr.D Gr.65 | S235JO | SM400A SM400B | S235JO | 080A15 S235JO | E235C | |
| Q235D | Gr.D | S235J2G3 S235J2G4 | SM400A | S235J2G3 S235J2G4 | S235J2G3 S235J2G4 | E235D |
ST37 steel is a German carbon structural steel material grade, which consists of many small grades, such as: St37-2, St37-3U, St37-3n, RSt-2, USt37-2, etc. ST37 steel corresponds to the Chinese brand Q235B steel.
A106 steel is an American standard material, including three grades of A, B, and C. Among them, A106A steel is similar to domestic 20# steel; A106B steel is similar to domestic Q235 steel; A106C is similar to Q345 steel.
◆ Properties
Chemical properties:
| Q235 Hot Rolled Coil | Uniform Number Code | Grade | Deoxygenation Method | C | Si | Mn | P | S |
| U12352 | A | F、Z | ≤0.22 | ≤0.35 | ≤1.40 | ≤0.045 | ≤0.050 | |
| U12355 | B | ≤0.20b | ≤0.045 | |||||
| U12358 | C | Z | ≤0.17 | ≤0.040 | ≤0.040 | |||
| U12359 | D | TZ | ≤0.035 | ≤0.035 | ||||
a The uniform numbers of killed steel and special killed steel grades are shown in the table, and the unified numerical codes of boiling steel grades are as follows: Q235AF--U12350 , Q235BF--U12353 . b With the consent of the purchaser, the carbon content of Q235B may not exceed 0.22%. | ||||||||
A106 steel: A106A contains C and Si elements; A106B and A106C contain C, Mn, Si and other elements.
Mechancal properties:
| Q235 Steel | Grade | Yield Strength ReH/(N/mm2) | Tensile strength b Rm/(N/mm2) | Elongation after break A/% | Impact test (V-notch) | ||||||||||
| Thickness (or diameter)/mm | Thickness (or diameter)/mm | temperature/℃ | Impact absorption energy (longitudinal)/J | ||||||||||||
| ≤16 | ＞16~40 | ＞40~60 | ＞60~100 | ＞100~150 | ＞150~200 | ≤40 | ＞40~60 | ＞60~100 | ＞100~150 | ＞150~200 | |||||
| A | ≥235 | ≥225 | ≥215 | ≥215 | ≥195 | ≥185 | 370~500 | ≥26 | ≥25 | ≥24 | ≥22 | ≥21 | - | - | |
| B | +20 | 27c | |||||||||||||
| C | 0 | ||||||||||||||
| D | -20 | ||||||||||||||
b For steel with a thickness greater than 100mm, the lower limit of tensile strength is allowed to be reduced by 20N/mm2. The upper limit of tensile strength of wide-band steel (including shear steel plate) is not a delivery condition. c For Q235B grade steel products with a thickness less than 25mm, if the supplier can ensure that the value of the impact absorption energy is qualified, the inspection may not be carried out with the consent of the buyer. | |||||||||||||||
| Q235 Hot Rolled Coil | Specimen Direction | Cold bending test 180° B=2αa | |
| Steel thickness (or diameter)b / mm | |||
| ≤60 | ＞60~100 | ||
| Center diameter d | |||
| vertical | 0.5α | 1.5α | |
| horizontal | α | 2α | |
| a B is the width of the sample, and α is the thickness (or diameter) of the sample. b When the thickness (or diameter) of the steel is greater than 100mm, the bending test shall be determined through negotiation between the two parties. | |||
◆ Characteristic
Q235 hot rolled coil, also known as A3 hot-rolled coil, is a common carbon structural steel. Q represents the yield limit of this hot-rolled coil, and the latter 235 refers to the yield value of this hot-rolled coil, which is about 235MPa. However, the yield value of Q235 carbon steel coil will decrease with the increase of thickness. Due to the moderate carbon content, good overall performance, and good matching of strength, plasticity and welding performance, it is the most widely used.
◆ Industry&Application
1. Widely used in construction and engineering structures. It is used to make steel bars or build factory building frames, high-voltage transmission towers, bridges, vehicles, boilers, containers, ships, etc., and is also widely used as mechanical parts that do not require high performance. Grade C and D steels of Q253 carbon steel can also be used as some professional steels.
2. Q235 steel can be used for various mold handles and other unimportant mold parts.
3. Q235 steel is used as the punch material, which can be used directly without tempering after deep fire, with a hardness of 36-40HRC, which solves the phenomenon that the punch breaks during use.
◆ Purchasing Information
| Product name | Q235 Hot Rolled Coil; A106 steel; ST37 steel |
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Standard |
GB,JIS,ASTM,BS,DIN,ISO... |
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Thickness |
Hot Rolled: 4-100mmCold Rolled:0.2-4mm |
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Width |
500-3000mm |
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Weight |
4-5tons/roll (Or as custom) |
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Certification |
ISO9001, SGS, BV,CE |
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Trade Terms |
EXW,FOB,CIF CFR |
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Loading Port |
TIANJIN,SHANGHAI,DALIAN QINGDAO,etc |
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Payment terms |
1) 30% deposit by T/T, the balance against copy of B/L by T/T. |
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2) 30% deposit by T/T, the balance by L/C at sight. |
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3) 100% L/C at sight. |
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Packing Detail |
Standard export package:Wooden pallet +paperboard +steel strip Customized requirements are accepted |
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Delivery time |
Usually 7-15 days, or upon negotiation |
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Samples |
Free samples are provided but the fright is borne by the buyer |
| *If you do not find what you are looking for, please call us now. If you have found it, we are happy to answer any questions or concerns you may have about stainless steel grades and assist you through the purchasing process. | |
The steel grade of our products have carbon structural steel, carbon tool steel, carbon spring steel, stainless steel, heat-resistant steel, wear-resistant steel, alloy spring steel, alloy structural steel, bearing steel, alloy tool steel, high alloy tool steel, high-speed tool steel, high temperature alloys, electrical alloy, precision alloy, low temperature steel, electrical steel, ductile iron, grey cast iron, etc.We can provide professional steel, such as bridge steel, ship steel, boiler steel, pressure vessel steel, agricultural machinery steel, etc.
