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ASTM A542 Type E Class 4a | A542-E Cl.4a Inventory:
ASTM A542 Type E Class 4a quenched-and-tempered Cr-Mo-V (higher Cr; Nb) plate. Yield min 60
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ASTM A542 Type E Class 4 | A542-E Cl.4 Ve Inventory:
ASTM A542 Type E Class 4 quenched-and-tempered Cr-Mo-V (higher Cr; Nb) plate. Yield min 55
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ASTM A542 Type D Class 4a | A542-D Cl.4a Inventory:
ASTM A542 Type D Class 4a quenched-and-tempered Cr-Mo-V (2¼Cr band; higher V) plate. Yield
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ASTM A542 Type C Class 4a | A542-C Cl.4a Inventory:
ASTM A542 Type C Class 4a quenched-and-tempered Cr-Mo-V (higher Cr; Ti + B) plate. Yield mi
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ASTM A542 Type C Class 4 | A542-C Cl.4 Ve Inventory:
ASTM A542 Type C Class 4 quenched-and-tempered Cr-Mo-V (higher Cr; Ti + B) plate. Yield min
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ASTM A542 Type C Class 3 | A542-C Cl.3 Ve Inventory:
ASTM A542 Type C Class 3 quenched-and-tempered Cr-Mo-V (higher Cr; Ti + B) plate. Yield min
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ASTM A542 Type C Class 2 | A542-C Cl.2 Ve Inventory:
ASTM A542 Type C Class 2 quenched-and-tempered Cr-Mo-V (higher Cr; Ti + B) plate. Yield min
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ASTM A542 Type C Class 1 | A542-C Cl.1 Ve Inventory:
ASTM A542 Type C Class 1 quenched-and-tempered Cr-Mo-V (higher Cr; Ti + B) plate. Yield min
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ASTM A542 Type B Class 4a | A542-B Cl.4a Inventory:
ASTM A542 Type B Class 4a quenched-and-tempered 2¼Cr-1Mo (restricted residuals) plate. Yie
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ASTM A542 Type B Class 4 | A542-B Cl.4 Ve Inventory:
ASTM A542 Type B Class 4 quenched-and-tempered 2¼Cr-1Mo (restricted residuals) plate. Yiel
ASTM A542 / A542M covers quenched-and-tempered chromium-molybdenum and chromium-molybdenum-vanadium steel plates for pressure vessels. Naming uses Type for the chemistry family (A–E) and Class for the mechanical-property set (1, 2, 3, 4, or 4a). Not every Type may be ordered to every Class; ASTM A542/A542M Scope states Type E is available only as Class 4 and Class 4a. This hub lists the 18 Type–Class product pages prepared for this site. Gangsteel produces and exports these Type and Class plates cut to size when ordered; thickness, testing, impact/PWHT/NDE supplements, and certificate requirements must be written on the purchase order—do not treat this page as a stock or certificate guarantee.
Order plates to the ASTM designation and edition named on the drawing and purchase order. ASME SA-542 is the related Boiler and Pressure Vessel Code material specification used when a Code order requires SA marking; ASTM A542 and ASME SA542 are related but not simply interchangeable—match the designation the project requires.
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ASTM A542 Quenched-and-Tempered Cr-Mo / Cr-Mo-V Pressure Vessel Plates |
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Type (chemistry) overview. Values below are heat-analysis highlights verified for the product pages on this hub. Use the individual product page for the full element table applicable to that Type.
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Type |
Chemistry family (overview) |
Key heat-analysis highlights |
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A |
2¼Cr-1Mo |
Cr 2.00–2.50; Mo 0.90–1.10; C 0.15 max; V 0.03 max |
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B |
2¼Cr-1Mo (restricted residuals) |
Cr 2.00–2.50; Mo 0.90–1.10; C 0.11–0.15; tighter P/S/Cu/Ni/V vs Type A |
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C |
Cr-Mo-V (higher Cr; Ti + B) |
Cr 2.75–3.25; Mo 0.90–1.10; V 0.20–0.30; Ti 0.015–0.035; B 0.001–0.003 |
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D |
Cr-Mo-V (2¼Cr band; higher V) |
Cr 2.00–2.50; Mo 0.90–1.10; V 0.25–0.35; this hub lists Class 4a |
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E |
Cr-Mo-V (higher Cr; Nb) |
Cr 2.75–3.25; Mo 0.90–1.10; V 0.20–0.30; Cb/Nb 0.015–0.070; Scope: Class 4 & 4a only |
Class (mechanical) overview. Tensile, yield, and elongation below follow the verified Class mechanical set used on the product pages. Class applies across permitted Types; always pair the Class with an allowed Type on the order.
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Class |
Tensile strength |
Yield strength, min |
El. in 2 in. [50 mm], min % |
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1 |
105–125 ksi [725–860 MPa] |
85 ksi [585 MPa] |
14 |
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2 |
115–135 ksi [795–930 MPa] |
100 ksi [690 MPa] |
13 |
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3 |
95–115 ksi [655–795 MPa] |
75 ksi [515 MPa] |
20 |
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4 |
85–110 ksi [585–760 MPa] |
55 ksi [380 MPa] |
20 |
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4a |
85–110 ksi [585–760 MPa] |
60 ksi [415 MPa] |
18 |
Delivery and heat treatment overview. Standard final condition is quenched and tempered (QT) to the ordered Class. Where the purchaser performs final QT under the specification rules, manufacturer pre-shipment temper still applies as stated on the product pages. Confirm austenitizing/temper practice against the contracted edition.
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Item |
Verified overview (confirm contracted edition on the PO) |
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A / B / C — Class 1, 2, 3 |
Minimum temper 1050°F [565°C] (where listed for these Type–Class rows) |
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A / B / C — Class 4 |
Minimum temper 1200°F [650°C] |
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A / B / C / D — Class 4a |
Minimum temper 1250°F [675°C] |
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Type D austenitize |
≥1650°F [900°C] |
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Type E austenitize |
≥1850°F [1010°C]; Type E §5.2 minimum temper row not verified in the public temper table used for these pages — confirm mill temper against the contracted edition; §5.4 purchaser path ≥1200°F [650°C] when that route applies |
See also ASME SA542, ASTM A387, ASTM A533, GB/T 713, Pressure Vessel Steel Plate.
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ASTM A542 Type E
ASTM A542 Type E Class 4a quenched-and-tempered Cr-Mo-V (higher Cr; Nb) plate. Yield min 60 ksi [415 MPa]; tens
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ASTM A542 Type E
ASTM A542 Type E Class 4 quenched-and-tempered Cr-Mo-V (higher Cr; Nb) plate. Yield min 55 ksi [380 MPa]; tensi
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ASTM A542 Type D
ASTM A542 Type D Class 4a quenched-and-tempered Cr-Mo-V (2¼Cr band; higher V) plate. Yield min 60 ksi [415 MPa
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ASTM A542 Type C
ASTM A542 Type C Class 4a quenched-and-tempered Cr-Mo-V (higher Cr; Ti + B) plate. Yield min 60 ksi [415 MPa];