mild steel flat bar, there are Q195, Q215, Q235, Q275, Q355, Q390, Q420, Q460 and other grades. For more information on chemical composition, mechanical properties, applications, etc., please refer to Hanhuang Steel.
| Chemical properties of mild steel flat bar, no greater than. | |||||||
| Carbon structural steels | Steel Grade | Grade | C | Si | Mn | P | S |
| Q195 | - | 0.12 | 0.30 | 0.50 | 0.035 | 0.040 | |
| Q215 | A | 0.15 | 0.35 | 1.20 | 0.045 | 0.050 | |
| B | 0.045 | ||||||
| Q235 | A | 0.22 | 0.35 | 1.40 | 0.045 | 0.050 | |
| B | 0.20 | 0.045 | |||||
| C | 0.17 | 0.040 | 0.040 | ||||
| D | 0.035 | 0.035 | |||||
| Q275 | A | 0.24 | 0.35 | 1.50 | 0.045 | 0.050 | |
| B | 0.21 | 0.045 | 0.045 | ||||
| C | 0.20 | 0.040 | 0.040 | ||||
| D | 0.035 | 0.035 | |||||
| Chemical properties of mild steel flat bar, no greater than. | ||||||||||||||||
| High strength low alloy structural steels | Steel Grade | Grade | C | Si | Mn | P | S | Nb | V | Ti | Cr | Ni | Cu | Mo | N | B |
| Q355 | B | 0.24 | 0.55 | 1.60 | 0.035 | 0.035 | - | - | - | 0.30 | 0.30 | 0.40 | - | 0.012 | - | |
| C | ≤40mm:0.20 ＞40mm:0.22 | 0.030 | 0.030 | |||||||||||||
| D | 0.025 | 0.025 | - | |||||||||||||
| Q390 | B | 0.20 | 0.55 | 1.70 | 0.035 | 0.035 | 0.05 | 0.13 | 0.05 | 0.30 | 0.50 | 0.40 | 0.10 | 0.015 | - | |
| C | 0.030 | 0.030 | ||||||||||||||
| D | 0.025 | 0.025 | ||||||||||||||
| Q420 | B | 0.20 | 0.55 | 1.70 | 0.035 | 0.035 | 0.05 | 0.13 | 0.05 | 0.30 | 0.80 | 0.40 | 0.20 | 0.015 | ||
| C | 0.030 | 0.030 | ||||||||||||||
| Q460 | C | 0.20 | 0.55 | 1.80 | 0.030 | 0.030 | 0.05 | 0.13 | 0.05 | 0.30 | 0.80 | 0.40 | 0.20 | 0.015 | 0.004 | |
| Mechancal properties of mild steel flat bar | |||||||||
| Carbon structural steels | Steel Grade | Yield Strength ReH/(N/mm2), not less than | Tensile Strength Rm/(N/mm2) | Elongation after break A/% | |||||
| Thickness/mm | Thickness/mm | ||||||||
| ≤16 | ＞16~40 | ＞40~60 | ＞60~100 | ＞100~150 | ＞150~200 | ≤40 | |||
| Q195 | 195 | 185 | - | - | - | - | 315~430 | 33 | |
| Q215 | 215 | 205 | 195 | 185 | 175 | 165 | 335~450 | 31 | |
| Q235 | 235 | 225 | 215 | 215 | 195 | 185 | 370~500 | 26 | |
| Q275 | 275 | 265 | 255 | 245 | 225 | 215 | 410~540 | 22 | |
| Mechancal properties of mild steel flat bar | ||||||||||
| High strength low alloy structural steels | Steel Grade | Upper Yield Strength ReH/MPa | Tensile Strength Rm/MPa | Elongation after break A/% | ||||||
| Thickness/mm | ||||||||||
| ≤16 | ＞16~40 | ＞40~63 | ＞63~80 | ＞80~100 | ＞100~150 | ≤100 | ＞100~150 | ≤40 | ||
| Q355 | 355 | 345 | 335 | 325 | 315 | 295 | 470~630 | 450~600 | 22 | |
| Q390 | 390 | 380 | 360 | 340 | 340 | 320 | 490~650 | 470~620 | 21 | |
| Q420 | 420 | 410 | 390 | 370 | 370 | 350 | 520~680 | 500~650 | 20 | |
| Q460 | 460 | 450 | 430 | 410 | 410 | 390 | 550~720 | 530~700 | 18 | |
Q195: Used in construction, structure, motorcycle frame, etc.
Q215: Mainly used for building structures such as workshops, bridges, and ships, and for general fluid transportation pipelines.
Q235: widely used in architectural 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. It is also widely used as mechanical parts that do not require high performance.
Q275: Used to manufacture parts requiring higher strength. Such as gears, shafts, sprockets, keys, bolts, nuts, sections for agricultural machinery, conveyor chains and links.
Q355: Used in bridges, vehicles, ships, buildings, pressure vessels, special equipment, etc.
Q390: Ships, boilers, pressure vessels, oil storage tanks, bridges, power station equipment, lifting and transportation machinery and other welded structural parts with relatively high loads.
Q420: Large ships, bridges, power station equipment, medium and high pressure boilers, high pressure vessels, rolling stock, overweight machinery, mining machinery, and other large welded structural parts.
| Product Name | Mild Steel Flat Bar |
| Standard | ASTM, DIN, JIS, EN, AISI, BS, GB |
| Grade Group | Q195, Q215, Q235, Q275, Q355, Q390, Q420, Q460 |
| Thickness | 4-12mm or as your request |
| Section Shape | flat bar |
| Technique | hot rolled, cold drawn |
| Suface Treatment | Black Painted / Oiled /Galvanized |
| Width | 8-140 mm |
| Length | 1-12m or as your request |
| MOQ | 1 ton |
| Supply Ability | 5000 tons / month |
| Lead Time | 10-15 working days after the receipt of 30% deposit |
| Payment Terms | 30%T/T Advance + 70% Balance |
| Price Terms | FOB, CFR, CIF, EXW |
| Packing | Standard sea-worthy package or as required |
| *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 flat bar grades and assist you through the purchasing process. | |
◆ FAQ:
Q:Can you send samples?
A:Sample can be for free,freight cost collect.
Q:What product information do I need to provide?
A:Steel grade/thickness/width/quantity,these will decide the price.
Q:About product prices?
A:Prices vary from period to period due to cyclical changes in the price of raw materials.
Q:What are the certifications for your products?
A:We have ISO 9001,CE,SGS,BV and other certifications.
Q:How about the delivery time?
A:Regularly the delivery time around 10-15 days,customized one will inform the delivery time ahead.
Q:Does the product have quality inspection before loading?
A:All the products are strictly tested before packaging,also can inspect by third party inspection.
Q:How to pack the products?
A:Standard export package with waterproof film and wooden pallet.It can effectively protect products from corrosion.
