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BV F500 steel plate, also written as BV/F500, BV Grade F500 or market names such as FH50 / FQ51, is the extra-high-strength hull structural steel of Bureau Veritas Rules for the Classification of Steel Ships (IACS UR W16 extra-high-strength family) with 500 MPa minimum yield, 610-770 MPa tensile strength and Charpy V-notch toughness at -60°C [-76°F]. In the grade name, "F" is the toughness class, and "500" is the yield-strength level in MPa (not AH500). Gangsteel, a steel plate exporter, supplies BV F500 plates cut to size for shipbuilding, offshore platforms and marine structures.
Data source: Per IACS UR W16 (extra-high-strength hull structural steel) as adopted in Bureau Veritas hull structural steel rules, cross-checked with LR FH50 / ABS FQ51 sibling pages on gangsteel.net. Official mill/certificate grade is BV F500. Verify the current BV edition before ordering.
| Element | C | Mn | Si | P | S | Al (acid sol.) |
|---|---|---|---|---|---|---|
| BV F500, % | 0.18 max | 1.60 max | 0.10-0.55 | 0.025 max | 0.025 max | 0.015 min |
| Element | N | Nb | V | Ti | B | Notes |
| BV F500, % | 0.020 max | 0.02-0.05 | 0.04-0.10 | 0.02 max | 0.005 max | Ni/Cu/Cr/Mo per delivery condition (N/TM/QT) in UR W16 |
Per IACS UR W16 / Bureau Veritas extra-high-strength rules. Exact maxima for Ni, Cu, Cr and Mo depend on delivery condition (N/NR, TM or QT). Carbon equivalent / CET / Pcm limits apply by thickness and condition; confirm on the mill certificate and current rule edition.
When product analysis is required, apply ASTM A6/A6M Table A permitted variations to the heat limits unless the element is min-only or not listed in Table A.
| Element | Heat analysis limit | Product analysis (heat ± A6) |
|---|---|---|
| C | 0.18 max | 0.22 max |
| Mn | 1.60 max | see A6 Table A vs heat upper limit |
| Si | 0.10-0.55 | 0.05–0.61 (approx. A6) |
| P | 0.025 max | 0.035 max |
| S | 0.025 max | 0.035 max |
| Al (acid sol.) | 0.015 min | no A6 Table A tolerance; product value not tabulated |
| N | 0.020 max | 0.025 max (typical A6 +0.005) |
| Nb | 0.02-0.05 | 0.010–0.060 |
| V | 0.04-0.10 | 0.030–0.110 |
| Ti | 0.02 max | 0.03 max |
| B | 0.005 max | product analysis often not applicable |
Product analysis applies only when specified; for a range, results may not vary both above and below it.
| Grade | Yield strength, min | Tensile strength | Elongation, min |
|---|---|---|---|
| BV F500 | 500 MPa [73 ksi] | 610-770 MPa [88-112 ksi] | 16% |
Per IACS UR W16 / Bureau Veritas rules (common t≤50 mm values). Yield may step down for thicker plates per UR W16; confirm thickness-dependent values on the order.
| Thickness | Test temperature | Longitudinal, avg min | Transverse, avg min |
|---|---|---|---|
| t≤50 mm | -60°C [-76°F] | 50 J | 33 J |
| 50<t≤70 mm | -60°C [-76°F] | 50 J | 33 J |
| 70<t≤100 mm | -60°C [-76°F] | 50 J | 33 J |
Per IACS UR W16 / Bureau Veritas extra-high-strength practice. Average of three full-size specimens; transverse values apply when required. Thicker plates by agreement.
Deoxidation: Killed, fine-grain practice. Delivery condition: typically TMCP or QT for extra-high-strength plates; N/NR may apply at lower extra-high levels per rules. F-class (F500) grades are supplied normalized or TMCP (often with Ni alloying for -60°C toughness); as-rolled delivery is not permitted. Optional extras: UT, Z15/Z25/Z35, BV survey.
Extra-high-strength BV A/D/E/F 420-690 plates are commonly supplied from about 6 mm to 100 mm thick (thicker by agreement under UR W16). Width 1500-4000 mm and length 6000-18000 mm are typical.
| Society / Standard | Equivalent grade |
|---|---|
| BV (Bureau Veritas) | BV F500 steel plate (LR FH50 / ABS FQ51) |
| LR (Lloyd's Register) | LR FH50 steel plate |
| ABS | ABS FQ51 steel plate |
| CCS | CCS F500 steel plate |
| GL | GL F500 steel plate |
| DNV | DNV F500 steel plate |
| NK | NK F51 steel plate |
| KR | KR F51 steel plate |
| RINA | RINA F500 steel plate |
IACS societies align extra-high-strength hull grades under UR W16; naming differs (BV F500, LR FH50, ABS FQ51). Dual certification is common when ordered that way.
It is an extra-high-strength hull structural steel under Bureau Veritas Rules (IACS UR W16 extra-high-strength family), with 500 MPa minimum yield, 610-770 MPa tensile strength and Charpy toughness at -60°C [-76°F].
BV is Bureau Veritas. The letter F is the toughness class (Charpy at -60°C [-76°F]), and 500 is the yield-strength level in MPa. Market/LR naming often uses FH50; ABS often uses FQ51. Note: BV does not use AH500 — the grade is F500, not AH500.
Minimum 500 MPa (73 ksi), tensile 610-770 MPa (88-112 ksi), elongation about 16% min (for the common thickness range).
Charpy V-notch at -60°C [-76°F]. Typical longitudinal average minimum is 50 J (transverse 33 J) for the tabulated thickness range on this grade page.
Same 500 MPa strength class. Toughness class differs: A at 0°C, D at -20°C, E at -40°C, F at -60°C. Chemistry (C, P, S, Mn) is tightened for colder classes.
BV AH40 is UR W11 higher-strength (390 MPa). BV F500 is UR W16 extra-high-strength (500 MPa) with different chemistry and delivery practice (often TM/QT).
They are IACS counterparts in the extra-high-strength family; exact chemistry/delivery options differ by society edition. Dual certification is available when surveys are arranged.
Weldable with approved procedures for extra-high-strength ship steel. Preheat, heat input and consumable matching are critical; follow the mill WPS and BV welding requirements.
Extra-high-strength grades are typically delivered TMCP or quenched and tempered (QT), sometimes normalized/normalized-rolled depending on strength level and thickness. F-class (F500) grades are supplied normalized or TMCP (often with Ni alloying for -60°C toughness); as-rolled delivery is not permitted. Optional extras: UT, Z15/Z25/Z35, BV survey.
Common supply is about 6-100 mm (thicker by agreement under UR W16 / BV rules), 1500-4000 mm wide and 6000-18000 mm long.
BV Grade A steel plate | BV Grade B steel plate | BV Grade D steel plate | BV Grade E steel plate | BV AH32 steel plate | BV AH36 steel plate | BV AH40 steel plate | BV DH32 steel plate | BV DH36 steel plate | BV DH40 steel plate | BV EH32 steel plate | BV EH36 steel plate | BV EH40 steel plate | BV FH32 steel plate | BV FH36 steel plate | BV FH40 steel plate | BV A420 steel plate | BV A460 steel plate | BV A500 steel plate | BV A550 steel plate | BV A620 steel plate | BV A690 steel plate | BV D420 steel plate | BV D460 steel plate | BV D500 steel plate | BV D550 steel plate | BV D620 steel plate | BV D690 steel plate | BV E420 steel plate | BV E460 steel plate | BV E500 steel plate | BV E550 steel plate | BV E620 steel plate | BV E690 steel plate | BV F420 steel plate | BV F460 steel plate | BV F550 steel plate | BV F620 steel plate | BV F690 steel plate
BV F500 corresponds to extra-high-strength counterparts under other IACS societies (LR FH50, ABS FQ51, etc.): LR FH50 steel plate, ABS FQ51 steel plate, CCS F500 steel plate, GL F500 steel plate, DNV F500 steel plate, NK F51 steel plate, KR F51 steel plate, RINA F500 steel plate.
BV DH40 (BV Grade DH40) shipbuilding steel plate: 390 MPa yield, 510-650 MPa tensile, Charpy at -20C, chemistry
BV DH36 (BV Grade DH36) shipbuilding steel plate: 355 MPa yield, 490-620 MPa tensile, Charpy at -20C, chemistry
BV AH36 (BV Grade AH36) shipbuilding steel plate: 355 MPa yield, 490-620 MPa tensile, Charpy at 0C, chemistry a
Gangsteel is specialized in supplying BV extra high strength steel plate in BV Grade E690
