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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

SS 321 Plates

Design Standards: ASTM A240, ASME SA240, EN 10088-2

Material Grade: Stainless Steel 321 (UNS S32100)

Stabilizing Element: Titanium (Ti) Added for Weld Integrity

Temperature Limit: Service Range up to 800°C - 900°C

Thickness Range: 0.5 mm to 100 mm

Surface Finish: No.1 (HRAP), 2B, BA, No.4, Polished

Key Property: Excellent Resistance to Chromium Carbide Precipitation

Core Applications: Exhaust Manifolds, Expansion Joints, Aerospace

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SS 321 Plates are titanium-stabilized austenitic stainless steel plates designed specifically for applications involving frequent exposure to high temperatures ranging from 425°C to 815°C. Unlike standard 300-series alloys, Grade 321 is alloyed with titanium in a quantity at least five times the carbon content. This addition prevents chromium carbide precipitation during welding and high-temperature service, effectively eliminating the risk of intergranular corrosion. This makes SS 321 an indispensable material for heavy-duty welded components that cannot be annealed after fabrication.

Manufactured according to ASTM A240 and ASME SA240, these plates exhibit superior creep and stress rupture properties compared to Grade 304 and 304L. While SS 321 offers similar general corrosion resistance to 304, its primary advantage lies in its structural stability and oxidation resistance in aggressive thermal environments. Widely utilized in the aerospace, petrochemical, and automotive industries, our SS 321 plates are the preferred choice for manufacturing exhaust systems, thermal oxidizers, and high-temperature chemical processing equipment where safety and long-term durability are critical requirements.

SS 321 Plates Features

» Titanium Stabilization: Alloyed with titanium to prevent chromium carbide precipitation, ensuring the plate remains immune to intergranular corrosion in the weld heat-affected zone.
» High Temperature Range: Maintains excellent structural integrity and oxidation resistance in temperatures ranging from 425°C up to 815°C (1500°F).
» Superior Creep Strength: Exhibits higher long-term creep and stress rupture properties than Grades 304 and 304L, making it ideal for high-pressure thermal applications.
» Excellent Weldability: Can be welded using most conventional techniques; titanium stabilization removes the necessity for post-weld solution annealing to restore corrosion resistance.
» Resistance to Polythionic Acid: Highly effective in refinery environments where polythionic acid stress corrosion cracking is a concern during downtime.
» Cryogenic Performance: Like other austenitic grades, SS 321 retains excellent toughness and mechanical strength at sub-zero temperatures.
» Non-Magnetic Property: The material remains non-magnetic in the annealed condition, suitable for sensitive electronic and aerospace instrumentation.
» Abrasive Durability: Offers good resistance to scaling and vibrational fatigue, essential for exhaust manifolds and expansion bellows in heavy machinery.

SS 321 Plates Specification

Standard Specs

ASTM: A240 / A240M
ASME: SA240 / SA240M
UNS Number: S32100
Werkstoff No: 1.4541

Chemical Profile

Titanium (Ti): 5 x (C+N) min - 0.70% max
Chromium (Cr): 17.0% – 19.0%
Nickel (Ni): 9.0% – 12.0%
Carbon (C): 0.08% Max

Mechanical Data

Tensile Strength: 515 MPa (Min)
Yield Strength: 205 MPa (Min)
Elongation: 40% (Min)
Hardness: 217 Brinell Max

Size Range

Thickness: 0.5mm to 100mm
Width: 1000mm to 2500mm
Length: 2000mm to 12000mm
Custom: Plate cutting & profiling

Thermal Rating

Service Temp: 425°C – 815°C
Density: 8.0 g/cm³
Melting Point: 1400°C – 1425°C
Thermal Cond: 16.1 W/m.K (at 100°C)

Finish & Supply

Finish: No.1, 2B, BA, No.4, Satin
Testing: PMI, Ultrasonic, IGC (A262)
Value Added: Laser & Waterjet Cutting
Packing: Seaworthy Export Cases

SS 321 Plates Detailed Specifications

Property	Specification
Grade	SS 321
Material Type	Austenitic
Density	8.00 g/cm³
Tensile Strength	515 MPa (min)
Yield Strength	205 MPa (min)
Elongation	40% (min)
Hardness	Rockwell B: 90
Melting Point	1399°C - 1454°C
Corrosion Resistance	Excellent resistance to oxidation and corrosion in high-temperature environments
Applications	High-temperature environments, Heat exchangers, Chemical processing, Aircraft exhaust systems

SS 321 Plates Chemical Composition

Element	Composition %
Carbon (C)	0.08 max
Manganese (Mn)	2.00 max
Silicon (Si)	1.00 max
Phosphorus (P)	0.045 max
Sulfur (S)	0.030 max
Chromium (Cr)	17.00 – 19.00
Nickel (Ni)	9.00 – 12.00
Titanium (Ti)	5 × C min
Iron (Fe)	Balance

SS 321 Plates Mechanical Properties

Property	Value
Tensile Strength	520 MPa (min)
Yield Strength	205 MPa (min)
Elongation	40% (min)
Hardness	201 Brinell (max)
Modulus of Elasticity	193 GPa
Poisson's Ratio	0.3
Density	7.93 g/cm³
Melting Point	1375 – 1400°C

SS 321 Plates Equivalent Grades

Property	Value (Typical)
USA	UNS S32100
Europe	EN 1.4541
Germany	DIN 1.4541
UK	BS 321S23
Japan	JIS SUS 321
India	IS 6870

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