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Golden Steel Material is a premier ISO-certified stockist based in Al Jubail. We supply high-performance pipes, fittings, valves, and flanges to the Oil & Gas and Industrial sectors across Saudi Arabia and the GCC.

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Al Jubail 35526, Saudi Arabia

SA 387 GR.2 CL.1/2 Plates

Material Grade: ASME SA387 Grade 2 (Class 1 & 2)

Alloy System: Chromium-Molybdenum Alloy Steel

Service Environment: Elevated Temperature Pressure Vessels

Mechanical Flexibility: Available in Two Tensile Strength Classes

Thermal Edge: Resistance to Hydrogen Attack & Oxidation

Process Benefit: Excellent Weldability & Creep Resistance

Thickness Range: 6.0 mm to 150 mm

Primary Industries: Oil & Gas, Petrochemical, & Power Generation

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ASME SA387 Grade 2 Plates are specialized Chromium-Molybdenum alloy steel plates designed primarily for use in weldable pressure vessels and industrial boilers operating at elevated temperatures. The addition of Chromium provides essential resistance to oxidation and corrosion, while Molybdenum enhances the material's structural integrity and creep resistance under sustained thermal stress. These plates are engineered to withstand the demanding environments of the oil, gas, and petrochemical industries, where maintaining mechanical properties at high heat is critical for safety and operational longevity.

Available in two distinct strength levels, Class 1 and Class 2, SA387 Grade 2 offers engineers the flexibility to balance ductility and tensile strength based on specific vessel design requirements. Class 1 is typically preferred for applications requiring higher levels of ductility, while Class 2 is heat-treated to provide higher tensile and yield strengths to handle greater pressure loads. These plates are frequently utilized in the fabrication of heat exchangers, separators, and reaction vessels. Their refined grain structure and controlled chemistry ensure excellent weldability and toughness, making them a reliable choice for high-temperature services where resistance to hydrogen embrittlement and sulfur attack is required.

SA 387 GR.2 CL.1/2 Plates Features

» High-Temperature Stability: Specifically alloyed with Chromium and Molybdenum to maintain structural integrity and mechanical strength at elevated operating temperatures.
» Enhanced Creep Resistance: The Molybdenum content provides superior resistance to "creep" or slow deformation under sustained thermal stress, essential for boiler and pressure vessel safety.
» Oxidation & Corrosion Defense: The Chromium addition forms a protective oxide layer that shields the plate from atmospheric oxidation and corrosive chemical process streams.
» Dual Class Availability: Offered in Class 1 for higher ductility and Class 2 for higher tensile strength, allowing for precise matching with specific engineering design codes.
» Hydrogen Attack Resistance: Engineered to resist hydrogen embrittlement and high-temperature hydrogen attack (HTHA), making it ideal for refinery and petrochemical service.
» Excellent Weldability: Despite its alloy content, the plate is designed for high-quality welding, supporting the fabrication of complex vessel shells and heat exchanger headers.
» Refined Grain Structure: Through controlled heat treatment (Normalizing and Tempering), the material achieves a uniform grain structure for consistent toughness across the plate.
» Sulfidation Resistance: Provides effective protection against sulfur-bearing gases and liquids, extending the service life of equipment in sour gas and oil processing.

SA 387 GR.2 CL.1/2 Plates Specification

Standards

ASME Standard: SA387
ASTM Standard: A387
Grade: Grade 2
UNS Number: K11547

Chemistry

Chromium (Cr): 0.50% – 0.80%
Molybdenum (Mo): 0.45% – 0.65%
Carbon (C): 0.21% Max
Manganese (Mn): 0.55% – 0.80%

Strength Class

Class 1 Tensile: 380 – 550 MPa
Class 2 Tensile: 485 – 620 MPa
Class 1 Yield: 230 MPa (Min)
Class 2 Yield: 310 MPa (Min)

Condition

Primary State: Normalized & Tempered
Alternative: Annealed
PWHT: Post-Weld Heat Treatment
Service: Elevated Temperature

Size Range

Thickness: 6 mm to 150 mm
Width: 1500 mm to 3500 mm
Length: 6000 mm to 12000 mm
Edge Finish: Mill / Trimmed

Quality Control

Cert: EN 10204 3.1 / 3.2 IBR
Testing: HIC / SSC Tested
NDT: 100% Ultrasonic (UT) Tested
Compliance: NACE MR0175 / MR0103

SA 387 GR.2 CL.1/2 Plates Detailed Specifications

Property	Specification
Grade	ASME SA 387 GR.2 CL.1/2 Alloy Steel Plate
Width	1000mm-4500mm
Thickness	5mm-150mm
Length	3000mm-18000mm
Supply Condition	As Rolled, Normalized Rolling, Furnace Normalizing, Vacuum Degassing, Simulated Post-Weld Heat Treatment or as per customer requirement.
Impact tested	52° C
Process of Manufacturing	Hot-Rolled (HR)

SA 387 GR.2 CL.1/2 Plates Chemical Composition

C	Mn	P	S	Si	Cr	Mo
0.15 max	0.25 - 0.66	0.035 max	0.030 max	0.50 max	0.87 - 1.13	0.45 - 0.65

SA 387 GR.2 CL.1/2 Plates Mechanical Properties

A387 / SA387 Grade 2	Class 1	Class 2
Tensile Strength (ksi)	60-85	75-100
Tensile Strength (MPa)	415-585	515-690
Yield Strength (ksi)	30	45
Yield Strength (MPa)	205	310
Elongation in 50mm (%)	22	22
Reduction of area in %	45	45

SA 387 GR.2 CL.1/2 Plates Equivalent Grades

BS	EN	ASTM/ASME	DIN
-	13CrMo4-5	A387 / SA 387	13CrMo4-5

Industrial Locations & Keywords

Industrial Locations & Keywords
Riyadh Industrial Cities (1st, 2nd, 3rd & Sudair)
Jeddah Industrial Cities (1st, 2nd & 3rd)
Dammam Industrial Areas (1st, 2nd & 3rd)
Jubail Industrial City
Yanbu Industrial City
Rabigh Industrial City
Al Khobar Industrial Area
Al Ahsa Industrial City
Madinah Industrial City
Makkah Industrial City
Taif Industrial City
Tabuk Industrial City
Jazan Industrial City
Industrial supplier in Saudi Arabia
Pipe fittings supplier in Jubail / Dammam / Riyadh
Flange and valve supplier Saudi Arabia
Fast delivery industrial materials KSA