ASME SA387 Grade 2 Class 2 (SA387 Gr 2 Cl 2) Steel Plate

What is ASME SA387 Grade 2 Class 2 steel plate?

ASME SA387 Grade 2 Class 2 steel plate is a testament to modern metallurgy, blending chromium and molybdenum for exceptional performance in heat-stressed environments.

This SA387 Gr 2 Cl 2 grade’s quenched and tempered state elevates it above standard materials, offering tensile strength of 515-690 MPa and yield of 310 MPa minimum.

Ideal for boilers and vessels at 500°C and 400 bar, it’s a favorite in industries where failure isn’t an option. SHH STEEL’s plates are crafted with precision, ready for your next big project.

asme sa387 grade 2 class 2	sme sa387 grade 11 class 2	asme sa387 grade 911 class 2
asme sa387 grade 91 class 2	asme sa387 grade 22 class 2	asme sa387 grade 21 class 2
asme sa387 grade 22l class 1	asme sa387 grade 12 class 1	asme sa387 grade 11 class 1
asme sa387 grade 9 class 2	asme sa387 grade 22 class 1	asme sa387 grade 12 class 2
asme sa387 grade 9 class 1	asme sa387 grade 5 class 2	asme sa387 grade 2 class 1
asme sa387 grade 5 class 1	asme sa387 grade 21 class 1	asme sa387 grade 21l class 1

Material Specification

Under ASME SA-387/SA-387M, this grade is specified for alloy steel plates in pressure vessels, emphasizing quenched and tempered for peak performance. SHH STEEL ensures full compliance, with custom features and certifications.

Specification Element	Requirement	SHH STEEL Compliance	Keywords
Primary Standard	ASME SA-387/SA-387M	ASME Section VIII	SA387 Gr 2 Cl 2 specification
Thickness Range	6mm-100mm (custom)	Mill Test Certificate	SA387 Gr 2 Cl 2 dimensions
Width/Length	Up to 4600mm / 12000mm	Custom fabrication available	SA387 Gr 2 Cl 2 size options
Ultrasonic Testing	No laminations >0.25% thickness	Class 1 per ASME SA-578	SA387 Gr 2 Cl 2 inspection
Heat Treatment	Quenched and tempered	870-900°C quench, 620-650°C temper	SA387 Gr 2 Cl 2 heat treat

Chemical Composition

The alloy’s chemistry is fine-tuned for heat resistance, with Cr and Mo as key players.

Element	Melt Analysis (%)	Product Analysis (%)	Standard Limit	Test Method	Role	Keywords
Carbon (C)	0.05-0.17	0.04-0.18	0.17 max	ASME SA-350	Strength without brittleness	SA387 Gr 2 Cl 2 carbon
Manganese (Mn)	0.55-0.80	0.50-0.88	0.55-0.80	ASME SA-350	Toughness, hardenability	SA387 Gr 2 Cl 2 manganese
Phosphorus (P)	≤0.025	≤0.025	0.025 max	ASME SA-350	Reduces brittleness	SA387 Gr 2 Cl 2 phosphorus
Sulfur (S)	≤0.025	≤0.025	0.025 max	ASME SA-350	Improves weldability	SA387 Gr 2 Cl 2 sulfur
Silicon (Si)	0.15-0.40	0.13-0.45	0.15-0.40	ASME SA-350	Deoxidation, fluidity	SA387 Gr 2 Cl 2 silicon
Chromium (Cr)	0.50-0.80	0.46-0.85	0.50-0.80	ASME SA-350	Corrosion resistance	SA387 Gr 2 Cl 2 chromium
Molybdenum (Mo)	0.45-0.60	0.40-0.65	0.45-0.60	ASME SA-350	Creep resistance	SA387 Gr 2 Cl 2 molybdenum

Mechanical Properties

Q&T treatment gives it high tensile and yield, perfect for demanding uses.

Property	Value	Test Method	Temperature (°C)	Thickness Effect	Keywords
Tensile Strength	515-690 MPa	ASME SA-370	Ambient	-5% >100mm	SA387 Gr 2 Cl 2 tensile
Yield Strength	310 MPa (min)	ASME SA-370	Ambient	Stable to 100mm	SA387 Gr 2 Cl 2 yield
Elongation	18% (min)	ASME SA-370	Ambient	16-20% (6-25mm)	SA387 Gr 2 Cl 2 elongation
Impact Energy	27J typical	ASME SA-23	Ambient	All thicknesses	SA387 Gr 2 Cl 2 impact
Modulus of Elasticity	200 GPa	ASME SA-111	Ambient	Constant	SA387 Gr 2 Cl 2 modulus
Fatigue Limit	220 MPa (est.)	ASME SA-466	Ambient	Varies with surface	SA387 Gr 2 Cl 2 fatigue

Heat Treatment

uench and temper process at specific temps ensures optimal properties.

Factor	Value/Condition	Standard	Recommended	Keywords
Heat Treatment	Quench 870-900°C, Temper 620-650°C	ASME SA387	Q&T standard	SA387 Gr 2 Cl 2 heat treat

Delivery

elivered Q&T, with quick global shipping.

Factor	Value/Condition	Standard	Recommended	Keywords
Delivery Condition	Quenched & Tempered	ASME SA-20	Transit 3-7 days Asia	SA387 Gr 2 Cl 2 delivery

Tolerances

Strict adherence to ASME SA-20 for precise dimensions.

Factor	Value/Condition	Standard	Recommended	Keywords
Thickness Tolerance (<40mm)	±1.5mm	ASME SA-20	6-40mm	SA387 Gr 2 Cl 2 tolerance
Flatness	3mm per meter	ASME SA-20	All	SA387 Gr 2 Cl 2 flatness

Weldability

Low CE ensures easy welding with proper preheat.

Weldability Factor	Value/Condition	Standard	Recommended Process	Keywords
Carbon Equivalent (CE)	≤0.45	AWS D1.1	GTAW, SMAW	SA387 Gr 2 Cl 2 weldability
Preheating (°C)	150-200 (>25mm)	ASME Section IX	GMAW	SA387 Gr 2 Cl 2 welding
PWHT (°C)	620-650	ASME SA-20	All	SA387 Gr 2 Cl 2 heat treat
Filler Metal	E7018	AWS A5.1	SMAW	SA387 Gr 2 Cl 2 welding rod
Bend Test Radius (mm)	3t (t=thickness)	ASTM E190	All	SA387 Gr 2 Cl 2 bend test

Equivalent Grades

Equivalents like 10CrMo5-10 in EN make it adaptable.

Grade	Standard	Tensile (MPa)	Yield (MPa)	Elongation (%)	Impact (J)	Keywords
SA387 Gr 2 Cl 2	ASME SA387	515-690	310	18	27	SA387 Gr 2 Cl 2 equivalent
13CrMo4-5	EN 10028-2	440-590	290	22	27	SA387 Gr 2 Cl 2 EN grade
SCMV2	JIS G4109	440-590	290	22	27	SA387 Gr 2 Cl 2 JIS grade
15CrMoR	GB/T 713	440-590	295	19	27	SA387 Gr 2 Cl 2 GB grade
A387 Gr 2 Cl 2	ASTM A387	515-690	310	18	27	SA387 Gr 2 Cl 2 ASTM grade
15CrMo	GB 713	440-590	295	19	27	SA387 Gr 2 Cl 2 alternative

Supplementary Requirements

Add ultrasonic or Charpy for custom needs.

Requirement	Detail	Standard	Test Frequency	Applicable Thickness (mm)	Keywords
Ultrasonic Testing	Class 1, no laminations	ASTM A435	Full plate	6-100	SA387 Gr 2 Cl 2 ultrasonic
Charpy Impact	-50°C, 27J min	ASTM A20	Per heat	6-100	SA387 Gr 2 Cl 2 cold impact
Heat Analysis	Per heat number	ASTM E350	Each batch	All	SA387 Gr 2 Cl 2 analysis
Product Analysis	±0.02% tolerance	ASTM E350	Sample per lot	All	SA387 Gr 2 Cl 2 product test
Shot Blasting	Sa 2.5, 50-100μm profile	ISO 8501-1	On request	6-50	SA387 Gr 2 Cl 2 blasting

Applications

From vessels to tanks, this plate performs.

Application	Temperature (°C)	Pressure (bar)	Thickness (mm)	Standard Compliance	Keywords
Pressure Vessels	Up to 550	400	20-100	ASME Section VIII	SA387 Gr 2 Cl 2 vessels
Boilers	Up to 550	300	10-80	ASME Section I	SA387 Gr 2 Cl 2 boilers
Heat Exchangers	Up to 500	200	6-50	TEMA Standards	SA387 Gr 2 Cl 2 heat exchange
Storage Tanks	Up to 450	150	30-100	API 650	SA387 Gr 2 Cl 2 tanks
Offshore Equipment	Up to 450	300	20-80	ABS Rules	SA387 Gr 2 Cl 2 offshore

Why Choose SHH STEEL

HH STEEL offers ASME and ASTM-certified SA387 Gr 2 Cl 2 plates. We provide custom thicknesses up to 300mm. Heat treatments are tailored to your project. Our 15-year track record includes zero defect deliveries to 50+ countries. This is backed by SGS verification and mill test certificates.

Advantage	Benefit	Keywords
Expert Certification	ASME Section VIII compliant	SA387 Gr 2 Cl 2 certified
Custom Fabrication	Up to 300mm thickness	SA387 Gr 2 Cl 2 custom
Proven Reliability	50+ countries, zero rejects	SA387 Gr 2 Cl 2 trusted supplier

FAQ

What is ASME SA387 Grade 2 Class 2 used for?

ASME SA387 Grade 2 Class 2 is widely used for high-temperature pressure vessels, boilers, and heat exchangers in petrochemical industries. It handles temperatures up to 500°C and pressures to 400 bar, with 515-690 MPa tensile strength ensuring reliability. SHH STEEL supplies these for welded constructions per ASME Section VIII Division 1.

What is the difference between SA387 Gr 2 Cl 1 and SA387 Gr 2 Cl 2?

SA387 Gr 2 Cl 1 is normalized with 240 MPa yield for moderate service, while Gr 2 Cl 2 is quenched and tempered with 310 MPa yield for higher strength. SHH STEEL recommends Gr 2 Cl 2 for demanding apps.

What is the chemical composition of SA387 Gr 2 Cl 2?

The composition includes C 0.05-0.17%, Mn 0.55-0.80%, P ≤0.025%, S ≤0.025%, Si 0.15-0.40%, Cr 0.50-0.80%, Mo 0.45-0.60%, tested per ASME SA-350. This formula ensures creep resistance with CE ≤0.45 (AWS D1.1). SHH STEEL provides MTCs with full analysis for traceability.

Is SA387 Gr 2 Cl 2 weldable?

Yes, SA387 Gr 2 Cl 2 is highly weldable with low carbon (0.05-0.17%) and preheating at 150-200°C for >25mm. Use E7018 filler (AWS A5.1) for 90% joint efficiency per ASME Section IX. PWHT at 620-650°C reduces stress, validated by bend tests per ASTM E190.

What is the density of SA387 Gr 2 Cl 2?

The density is 7.85 g/cm³, standard for alloy steel, aiding weight calculations in vessel design. Hardness is 163-235 HB (ASME SA-18), balancing wear resistance for high-temperature use.

What is the equivalent of ASME SA387 Gr 2 Cl 2 in EN standards?

The closest EN equivalent is 13CrMo4-5 (EN 10028-2), with 440-590 MPa tensile and 290 MPa yield, suitable for EU boilers. SHH STEEL provides dual-certified plates for seamless transitions.

What is the maximum thickness for SA387 Gr 2 Cl 2?

Standard thickness is 100mm, with custom options up to 300mm available. Quenched and tempered at 620-650°C per ASME SA-20, these plates are ideal for high-temperature vessels, with ultrasonic testing per ASME SA-578 ensuring no laminations for structural integrity.

Conclusion

SHH STEEL’s ASME SA387 Gr 2 Cl 2 Pressure Vessel Steel Plates provide unmatched strength and reliability for high-temperature pressure vessels and boilers. With precise tolerances, superior weldability, and global equivalents, we offer customized solutions. Trust SHH STEEL for your steel needs.