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 |
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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.