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A533 Pressure Vessel Steel Plate

ASTM A533 pressure vessel steel plates are manganese-molybdenum and manganese-molybdenum-nickel alloy steel plates suitable for welding pressure vessels. There are three levels of each category: level 1, level 2 and level 3.

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A533 Pressure Vessel Steel Plate Description

Usually coming with quenching and tempering heat treatment, ASTM A533 pressure vessel steel is available in five different strength grades: Class A, Class B, Class C, Class D, and Class E. ASTM A533 boiler vessel plate has excellent low temperature impact toughness and mechanical properties and is commonly used in low temperature conditions. ASTM A533 pressure vessel steel plates are widely used in low-temperature separation processing, liquefied gas storage and other fields, such as large-scale vacuum low-temperature liquefied natural gas (LNG) storage equipment. At the same time, the plates are often used in the strip area of nuclear reactor vessels, where material properties may be affected by strong radiation.

Product Parameters

Product Name	A533 Pressure Vessel Steel Plate
Production Process	Hot Rolling, Cold Rolling
Material Standards	AISI, ASTM, ASME, DIN, BS, EN, ISO, JIS, GOST, SAE, etc.
Width	100mm-3000mm
Length	1m-12m, or Customized Size
Thickness	0.1mm-400mm
Delivery Conditions	Rolling, Annealing, Quenching, Tempered or Standard
Surface Process	Ordinary, Wire Drawing, Laminated Film

Chemical Composition

A533	-	Class A	Class B	Class C	Class D	Class E
C	-	0.25	0.25	0.25	0.25	0.20
Mn	Smelting Analysis	1.15-1.50	1.15-1.50	1.15-1.50	1.15-1.50	1.15-1.70
Mn	Finished Product Analysis	1.07-1.62	1.07-1.62	1.07-1.62	1.07-1.62	1.04-1.84
P	-	0.025	0.025	0.025	0.025	0.020
S	-	0.025	0.025	0.025	0.025	0.015
Si	Smelting Analysis	0.15-0.40	0.15-0.40	0.15-0.40	0.15-0.40	0.15-0.40
Si	Finished Product Analysis	0.13-0.45	0.13-0.45	0.13-0.45	0.13-0.45	0.13-0.45
Mo	Smelting Analysis	0.45-0.60	0.45-0.60	0.45-0.60	0.45-0.60	0.25-0.60
Mo	Finished Product Analysis	0.41-0.64	0.41-0.64	0.41-0.64	0.41-0.64	0.21-0.64
Ni	Smelting Analysis	-	0.40-0.70	0.70-1.00	0.20-0.40	0.60-1.00
Ni	Finished Product Analysis	-	0.37-0.73	0.67-1.03	0.17-0.43	0.57-1.03
Cr	Smelting Analysis	-	-	-	-	0.60
Cr	Finished Product Analysis	-	-	-	-	0.64

Mechanical Properties

A533	Tensile Strength Ksi (MPa)	Yield Strength Ksi (MPa)	Elongation Gauge Length 2in. [50mm], %
Grade 1	80-100 [550-690]	50 [345]	18
Grade 2	90-115 [620-795]	70 [485]	16
Grade 3	100-125 [690-860]	83 [570]	16

Physical Performance

Physical Performance	Metric	Imperial
Density	7.7-8.03 g/cm3	0.278-0.290 lb/in3

Scope of Application

ASTM A533 boiler vessel plate has excellent low temperature impact toughness and mechanical properties, and is usually used under low temperature conditions. ASTM A533 boiler vessel plate is widely used in low temperature separation processing, liquefied gas storage and other fields, such as large vacuum low temperature liquefied natural gas (LNG) storage equipment.

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How do you guarantee product quality?

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Our factory operates under strict QA/QC standards. Every product is inspected during production and before shipment to ensure it meets agreed quality specifications. We can provide mill test certificates and accept thirdparty inspections upon request.

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What certifications do you have?

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Our products comply with international standards including ASTM, ASME, DIN, and EN. We also hold quality management certifications and can provide relevant documentation upon request.

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Can I get samples before ordering?

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Yes. We can provide free samples for your evaluation. Shipping costs are typically borne by the customer. Please contact our sales team to arrange sample delivery.

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What is your minimum order quantity (MOQ)?

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MOQ varies by product type and specification. For certain items, trial orders may be considered. Please contact us with your specific requirements for a confirmed MOQ.

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What payment terms do you accept?

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We commonly accept T/T (30% deposit in advance, 70% balance before shipment) and L/C. Other payment terms may be negotiated depending on order value and cooperation conditions.

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Do you offer discounts for large orders?

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Yes. We have strong capabilities for largescale project supply and offer favorable pricing for bulk orders. Our 100,000ton stock capacity allows us to provide competitive rates for volume purchases.

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What is your typical lead time?

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For stocked products, we can deliver to the loading port within 3–7 days after receiving the deposit. For production orders, lead time is typically 15–30 days after order confirmation, depending on product type and quantity.

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What shipping terms do you support?

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We support EXW, FOB, CIF, CFR, DDU, and other common trade terms. Shipping can be arranged by sea, air, or courier based on your requirements.

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How do you package the products?

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We use standard export packaging suitable for sea freight. For fragile or highsurfacefinish products such as stainless steel, we apply strict protective packaging to prevent scratches and damage during transit. Custom packaging is also available upon request.

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We are actively recruiting regional agents worldwide. If you are interested, please contact us with your background, market coverage, and target regions. We offer competitive agent policies and full support for your local market development.

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Do you accept bulk procurement orders?

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Yes. Bulk procurement is one of our core business models. With over 100,000 tons of stock and a robust supply chain, we are wellequipped to handle largevolume orders for overseas projects, manufacturers, and trading companies.

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Do you provide aftersales service?

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Yes. Our professional service team is available to address any questions regarding product quality, delivery, or usage. We are committed to providing ongoing support throughout our partnership.

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