ASTM A285 Grade C Pressure Vessel Steel


The ASTM A285 specification covers low to intermediate tensile strength carbon steel for use in non–critical pressure vessel applications.

The plate is used as a weldable material in the fabrication of pressure vessels and industrial boilers using fusion welding i.e. the joining of the material by melting them together to form one. The plate is offered at a maximum thickness of 50mm for all grades to ensure internal robustness.

As ASTM A285 does not promote high tensile strength, it is used commonly in the fabrication of storage tanks and low pressure temperature controlled vessels.

Masteel UK Limited offers the most common grade, ASTM 285 Grade C, in a variety of sizes and thicknesses, and is available as ex–stock or directly shipped from the mill. As with all our steels, our plates come with mill test certification and stampings and we can arrange for a variety of tests to be performed on the material if specified.

Alternatively, the customer can arrange testing via a third party testing house.

ASTM A285 Grade C

Although only effective in lower pressure environments, ASTM 285 Grade C is found throughout industry in a wide range or low pressurised applications. ASTM A285 Grade C is used in a range of other applications including structural, mechanical and general engineering purposes.

ASTM A285 Grade C is a low to intermediate yield steel used in the fabrication of carbon steel pressure vessels and boilers.

The steel is intended for use in standard tanks and boilers rather than high pressurised vessels due to the steels lower yield strength. ASTM A285 Grade C is supplied throughout the oil gas and petrochemical industry, and Masteel UK Limited hold this material in stock.

The material has good forming and welding characteristics under conventional methods.
(Chemical values are maximum unless stated otherwise. Mechanical properties are minimum values)
(Please note: the technical information above is for guidance only – for exact specifications please check with our Sales Team)

Table 1: Chemical & Mechanical Values for ASTM A285 Grade C

C 0.16
Si 0.35
Mn 0.4/1.2
P 0.03
S 0.03
Al 0.02
Cr 0.3
Cu 0.3
N 0.3
Mo 0.08
Nb 0.01
Ti 0.03
V 0.02
ASTM A285 Grade C steel plate

ASTM A285 Grade C steel plate

ASTM A285 Grade C steel plate/A285 Gr.C/A285C vessel plates boiler steel sheets

ASTM A285 Grade C/A285 Gr.C/A285C vessel plates boiler steel sheets are low to intermediate yield steel for use in non critical pressurised service to fabricate low pressure storage tanks, boilers and vessels rather than high pressurised vessels.

ASTM A285 Grade C/A285 Gr.C/A285C vessel plates boiler steel sheets chemical composition:

Grade C Si Mn P S Al Cr Cu Ni Mo Nb Ti V
A285Gr.C 0.16 0.35 0.4/1.2 0.03 0.03 0.02 0.3 0.3 0.3 0.08 0.01 0.03 0.02

ASTM A285 Grade C/A285 Gr.C/A285C vessel plates boiler steel sheets mechanical property:

Grade Tensile Strength(MPa) Yield Strength(MPa) % Elongation in 2 in.(50mm) min Impacting Test Temperature(°C)
A285Gr.C 380-515 205 25 -20,40,-60