অনুসন্ধানে এন্টার হিট বা বন্ধ করতে ESC
27 October 2025
If you’re trying to map Q245r Steel Equivalent grades across regions, you’re not alone. Buyers ask me this pretty much every month—usuসবy when a vessel tender lands on their desk with mixed standards. In fact, Q245R sits in that useful middle ground: a pressure-vessel plate with dependable weldability and toughness for moderate temperatures.
Here’s the short list many engineers use, with the usual caveat: chemistry and format alignments vary by mill, so verify before you weld.
To be honest, the best practice is equivalency by design data: minimum yield (~245 MPa), tensile band, impact test temperature, and PWHT behavior. That’s what fabricators actuসবy care সম্পর্কে.
| Item | Spec (typical) |
|---|---|
| Grade | Q245R (also Q345R on request) |
| Thickness | 6–150 mm (≈) |
| Width | 200–2000 mm |
| Length | Customization |
| Tolerance | ±1% (real-world use may vary) |
| Standards | GB, ASTM/ASME, EN, JIS, DIN |
| Technique | Hot rolled, normalized (N) as ordered |
| Processing | Bending, welding, decoiling, cutting, punching |
| Delivery | ≈21 days |
Materials and methods: killed steel slabs → hot rolling → normalizing → levelling → UT scan → sample cutting → mechanical tests → surface inspection → marking.
Testing standards we see on MTCs: tensile per GB/T 228, Charpy V-notch per GB/T 229 (often at 0°C or -20°C on request), UT per JB/T 4730 or EN 10160, and hydrotest at fabricator level. Typical plate results I’ve seen: ReL 255–285 MPa, Rm 440–570 MPa, CVN 0°C ≥ 34 J (many heats exceed 50 J).
Service life: in properly coated, deoxygenated media, 20–30 years is common for moderate-pressure vessels; corrosive duties need সবowance and lining strategy, of course.
Many customers say the weldability is forgiving, which tracks with its carbon equivalent and normalization. Surprisingly versatile for retrofits.
| Vendor | Lead time | Certs | Customization | Notes |
|---|---|---|---|---|
| Baidy Steel (Hebei) | ≈21 days | ISO 9001, EN 10204 3.1 MTC | Cut-to-length, bevel, UT ক্লাসes | Origin: ROOM 1616, SHOUJING E-WORLD, XINDU DISTRICT, XINGTAI, CHINA |
| Integrated Mill A | 30–45 days | ISO, PED optional | Limited sizes | Sharper pricing at volume |
| Trading House B | 7–10 days ex-stock | Mill 3.1 docs | Basic cutting | Check heat/lot traceability |
We specified Q245r Steel Equivalent to A516 Gr 60 for a mid-size biodiesel plant. 20 mm plates, normalized, UT S1-E1. Test coupons returned ReL 272 MPa, Rm 505 MPa, elongation 28%, CVN 0°C 47–62 J. Fabricator reported smooth SAW welding with standard PWHT. No laminar defects on UT—frankly, a textbook outcome.
If you need a Q245r Steel Equivalent matched to code calculations, ask for the mechanical test window, impact temp, and UT ক্লাস in the PO. It saves days later.
