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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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+966 54 662 1439
Al Jubail 35526, Saudi Arabia

SA 387 GR.5 CL.1/2 Plates

Material Grade: ASME SA387 Grade 5 (Class 1 & 2)

Alloy System: 5% Chromium - 0.5% Molybdenum Steel

Operating Range: Critical High-Temperature Service

Corrosion Profile: Superior Oxidation & Sulfidation Resistance

Structural Choice: Optimized for Pressure Vessel Design

Mechanical Feature: Enhanced Creep-Rupture Strength

Thickness Range: 6.0 mm to 150 mm

Primary Industries: Refineries, Chemical Plants, & Steam Generation

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ASME SA387 Grade 5 Plates represent a significant advancement in high-temperature alloy steel technology, featuring a nominal composition of 5% Chromium and 0.5% Molybdenum. These plates are specifically engineered for the most demanding sections of pressure vessels, boilers, and heat exchangers where standard carbon steels would succumb to thermal degradation. The increased Chromium content provides a robust defense against oxidation and atmospheric corrosion, while the Molybdenum addition ensures the material retains its mechanical integrity and resists "creep" under the extreme thermal loads found in refining and chemical processing.

The technical versatility of ASME SA387 Gr.5 is highlighted by its availability in Class 1 and Class 2 strength levels. Class 1 is typically supplied in an annealed or normalized and tempered condition for maximum ductility, whereas Class 2 is heat-treated to achieve higher tensile and yield strengths for high-pressure service. This grade is particularly effective in resisting high-temperature hydrogen attack (HTHA) and sulfidation, making it the premier choice for hydrocracking units and coker drums. With its exceptional weldability and refined metallurgical structure, SA387 Grade 5 plates provide a long-term, reliable solution for critical infrastructure operating in aggressive, high-heat environments.

SA 387 GR.5 CL.1/2 Plates Features

» Advanced High-Temperature Strength: Formulated with 5% Chromium to maintain high tensile and yield strength in environments reaching well beyond the limits of standard carbon steel.
» Superior Creep-Rupture Performance: The Molybdenum addition provides critical resistance to permanent deformation under sustained high-temperature stress, ensuring pressure vessel safety.
» Enhanced Oxidation Resistance: Significant Chromium content forms a stable, protective oxide scale that prevents surface degradation and metal loss in high-heat industrial furnaces.
» Resilience Against Hydrogen Attack: Specifically designed to resist High-Temperature Hydrogen Attack (HTHA), making it a reliable material for hydro-processing and refinery units.
» Class-Specific Versatility: Available in Class 1 for applications requiring maximum ductility and Class 2 for designs requiring higher allowable stress and tensile strength.
» Sulfidation Protection: Offers excellent defense against sulfur-bearing process streams, a common requirement in the processing of "sour" crude oil and gas.
» Predictable Heat Treatment Response: Responds consistently to Normalizing and Tempering, allowing for the achievement of precise metallurgical properties throughout the plate thickness.
» Reliable Weldability: Despite its high alloy content, the plate can be readily welded using appropriate pre-heat and post-weld heat treatment (PWHT) protocols to ensure joint integrity.

SA 387 GR.5 CL.1/2 Plates Specification

Standards

ASME Standard: SA387
ASTM Standard: A387
Grade: Grade 5
UNS Number: K41545

Chemistry

Chromium (Cr): 4.00% – 6.00%
Molybdenum (Mo): 0.45% – 0.65%
Carbon (C): 0.15% Max
Silicon (Si): 0.50% Max

Strength Class

Class 1 Tensile: 415 – 585 MPa
Class 2 Tensile: 515 – 690 MPa
Class 1 Yield: 205 MPa (Min)
Class 2 Yield: 310 MPa (Min)

Thermal State

Primary: Normalized & Tempered
Optional: Annealed
PWHT: Required for Welding
Limit: Up to 650°C Service

Size Range

Thickness: 6 mm to 150 mm
Width: 2000 mm to 3000 mm
Length: Up to 12000 mm
Edge: Mill / Machine Cut

Quality Control

MTC: EN 10204 3.1 Certified
Testing: HIC / SSC / Charpy V
Compliance: NACE MR0175 / IBR
NDT: Ultrasonic (UT) Level S1/S2

SA 387 GR.5 CL.1/2 Plates Detailed Specifications

Property	Specification
Grade	ASME SA 387 GR.5 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.5 CL.1/2 Plates Chemical Composition

C	Mn	P	S	Si	Cr	Mo
0.15 max	0.25 - 0.66	0.035	0.030	0.55 max	3.9 - 6.1	0.40 - 0.7

SA 387 GR.5 CL.1/2 Plates Mechanical Properties

A387 / SA387 Grade 5	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 (%)	18	18
Reduction of area in %	45	45

SA 387 GR.5 CL.1/2 Plates Equivalent Grades

BS	EN	ASTM/ASME	DIN
-	X12CrMo5	A387 / SA 387	-

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