ASTM A202 Pressure Vessel Steel Plate

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ASTM A202 Pressure Vessel Steel Material and Grades:
Alloy System: **Chromium-Manganese-Silicon (Cr-Mn-Si)** Low-Alloy Heat-Resistant Steel
ASTM A202 Steel consists of two grades:
Grade A: Moderate strength, high ductility; suitable for riveted structures and medium-load equipment.
Tensile Strength: 515–655 MPa; Yield Strength: ≥275 MPa
Grade B: Higher strength and yield; suitable for heavy-load, high-pressure vessels.
Tensile Strength: 585–760 MPa; Yield Strength: ≥345 MPa

ASTM A202 Pressure Vessel Steel Chemical Composition:

Element	Grade A	Grade B
C	≤0.17	≤0.25
Mn	0.97–1.52	0.97–1.52
Si	0.54–0.96	0.54–0.96
Cr	0.31–0.64	0.31–0.64
P/S	≤0.035	≤0.035

ASTM A202 Pressure Vessel Steel Mechanical Properties:
Grade A
Tensile Strength: 515–655 MPa
Yield Strength: ≥275 MPa
Elongation (50 mm gauge length): ≥18%
Impact Toughness: Room temperature V-notch (0°C / –20°C impact testing available upon request)
Grade B
Tensile Strength: 585–760 MPa
Yield Strength: ≥345 MPa
Elongation (50 mm gauge length): ≥17%
Impact Toughness: Room temperature V-notch (0°C / –20°C impact testing available upon request)

ASTM A202 Steel Dimensions and Delivery Condition:
- Thickness: Standard ≤ 50 mm (2 in); greater thicknesses available upon special agreement
- Width/Length: 1500–4000 mm × 3000–15000 mm (customizable)
- Delivery Condition: As-Rolled (AR), Normalized (N), Stress-Relieved Annealed (SR); combined treatments available

ASTM A202 Steel Applications:
- Power Plants/Industrial Boilers: Steam drums, superheater headers
- Petrochemicals: Hydro-reactors, fractionation columns, medium-temperature storage tanks
- Coal Chemicals/Fertilizers: High-pressure ammonia synthesis towers, heat exchangers
- Others: Medium-to-high pressure air storage tanks, steam accumulators