A203 Grade B Grade D Pressure Vessel Steel Plate
Want to know more about our products? Please contact us by email or phone.
Gnee Steel (Tianjin) Co., Ltd. is one of the most professional a203 grade b grade d pressure vessel steel plate manufacturers and suppliers in China. Welcome to wholesale customized a203 grade b grade d pressure vessel steel plate at competitive price from our factory. Good service and quality products are available.
Overview of ASTM A203 Grades
ASTM A203 is a nickel-alloy steel specification for low-temperature pressure vessels. Grade B and Grade D are designed for extreme cryogenic environments but differ in nickel content and operational limits:
| Parameter | Grade B | Grade D | Key Difference |
|---|---|---|---|
| Nickel Content | 2.0–2.5% | 3.0–3.5% | Higher Ni in Grade D improves low-T toughness |
| Min. Temp. Limit | -100°F (-73°C) | -150°F (-101°C) | Grade D for ultra-cryogenic applications |
| Typical Uses | LNG storage, cold boxes | Liquid nitrogen tanks, aerospace fuel vessels | Temperature dictates selection |
Chemical Composition (ASTM A203)
| Element | Grade B | Grade D | Functional Impact |
|---|---|---|---|
| C | ≤0.17 | ≤0.17 | Same carbon control for weldability |
| Mn | 0.30–0.60 | 0.30–0.60 | Maintains strength at low temperatures |
| Si | 0.15–0.30 | 0.15–0.30 | Deoxidizer for clean steel |
| Ni | 2.00–2.50 | 3.00–3.50 | Grade D's higher Ni prevents brittle fracture |
| P | ≤0.025 | ≤0.025 | Low phosphorus for ductility |
| S | ≤0.025 | ≤0.025 | Low sulfur for reduced hot-shortness |
Mechanical Properties
| Property | Grade B | Grade D | Testing Standard |
|---|---|---|---|
| Yield Strength | ≥275 MPa (40 ksi) | ≥275 MPa (40 ksi) | ASTM A20/A20M |
| Tensile Strength | 485–620 MPa (70–90 ksi) | 485–620 MPa (70–90 ksi) | ASTM A20/A20M |
| Elongation (A50) | ≥22% | ≥22% | ASTM A20/A20M |
| Charpy Impact | ≥27J @ -73°C | ≥27J @ -101°C | ASTM A370 (Subsize Specimens) |
Low-Temperature Toughness Comparison
| Temperature | Grade B Impact Energy | Grade D Impact Energy |
|---|---|---|
| -73°C (-100°F) | ≥34J | ≥42J |
| -101°C (-150°F) | Not recommended | ≥27J |
Note: Grade D maintains compliance at -101°C, while Grade B is limited to -73°C.
Industrial Applications
ASTM A203 Grade B
LNG Intermediate Storage: Buffer tanks (-70°C to -50°C)
Chemical Cold Boxes: Ethylene separation units (-60°C)
Food Freezing Systems: Structural supports for industrial freezers
ASTM A203 Grade D
Ultra-Low Temperature Storage:
Liquid nitrogen tanks (-196°C)
Liquid oxygen/argon containers (-183°C)
Aerospace:
Rocket propellant tanks (liquid hydrogen, -253°C)
Cryogenic propulsion systems for satellites
Research Equipment:
Superconducting magnet enclosures
A203 Grade B Grade D Pressure Vessel Steel Plate nickel alloy steel plates Global Standard Equivalents
| Standard | Grade B Equivalent | Grade D Equivalent |
|---|---|---|
| EN | 11Ni14 (EN 10028-4) | X8Ni9 (EN 10028-4) |
| JIS | SL2N255 (JIS G3127) | SL3N290 (JIS G3127) |
| GB | 09MnNiDR (GB 3531) | 08Ni3DR (GB 3531) |
low-temperature pressure vessel steel Real-World Case Studies
Case 1: Grade B in LNG Terminal (China)
Project: BOG (Boil-Off Gas) recondenser for coastal LNG terminal
Conditions: -70°C, 4MPa design pressure
Why Grade B?: Met -73°C impact requirements at 25% lower cost than Grade D
Result: Zero brittle fractures after 5 years of operation
Case 2: Grade D in Liquid Nitrogen Tank (Germany)
Project: Biopharma cryogenic storage system
Conditions: -196°C, atmospheric pressure
Why Grade D?: Certified for -101°C impact toughness (TÜV SIL-3 compliance)
Result: Achieved zero leakage over 3-year service
FAQ for A203 Grade B Grade D Pressure Vessel Steel Plate Engineers Or Buyers
Q1: Can Grade B be heat-treated for lower temperatures?
A: No. Low-T performance depends on nickel content, not heat treatment.
Q2: Is Grade D corrosion-resistant?
A: No. Requires cladding (e.g., stainless steel 304L) for corrosive environments.
Q3: Alternatives to Grade D for <-150°C?
A: Use 9% Ni steel (ASTM A553) or austenitic stainless steel (304L/316L).
Hot Tags: A203 Grade B Grade D Pressure Vessel Steel Plate, China A203 Grade B Grade D Pressure Vessel Steel Plate manufacturers, factory, boiler quality steel, A387 Pressure Vessel Steel Plate, Pressure Vessel Plate, pvq plate, A537CL1 Pressure Vessel Steel Plate, Stainless Pressure Vessel
You Might Also Like
Send Inquiry