SA516gr70+2205 Duplex Clad Plate Roll Bonded 6: 1 Ratio for Sulfur Corrosion/High Strength in Coker Drums

• Customization: Available
• Type: Steel Plate
• Standard: ASTM, AISI, GB, JIS, DIN, BS
• Certification: ISO, RoHS, IBR
• Surface Treatment: Coated
• Technique: Cold Rolled
• Application: Mold & Dies, Ship Plate, Boiler Plate, Container Plate, Flange Plate
• Special Use: Cutting Tools, Measuring Tools, Cutters in Common Steel, High-strength Steel Plate, Wear Resistant Steel, Silicon Steel
• Stock: Stock
• Transport Package: Standard Export Package
• Trademark: MESCO
• Origin: China(Mainland)
• Production Capacity: 10000tons/Year

Product Description

SA516Gr70+2205 Roll Bonded Clad Plate (6:1 Ratio) - Engineered for Sulfur Attack & Structural Integrity in Coker Drums

The Ultimate Material Solution for Delayed Coker Units

Designed to withstand extreme operating conditions in coker drums - high-temperature sulfur corrosion, thermal cycling stress, and mechanical impact - our SA516Gr70+2205 duplex clad plate delivers revolutionary performance. This roll-bonded composite merges the pressure-bearing strength of carbon steel with the superior corrosion resistance of duplex stainless steel, creating a zero-defect metallurgical bond that eliminates cracking, thinning, and failure in critical coker equipment.

 

Core Technology: Roll Bonding + Optimized 6:1 Ratio

1. Roll Bonding Process Advantages

• Solid-State Metallurgical Bond: High pressure and temperature forge an atomic-level bond between SA516Gr70 base and 2205 cladding without filler metals.

• Uniform Interface: Seamless transition layer prevents delamination (ASTM A264 compliant).

• Cladding Integrity: Zero dilution preserves 2205 duplex chemistry and corrosion resistance.

2. Engineered 6:1 Thickness Ratio

Layer	Function	Key Properties
SA516Gr70 (86%)	Structural Load-Bearing	- Tensile Strength ≥485 MPa - Impact Toughness ≥54J -29°C - ASME SA516/GB 713 Compliant
UNS S32205 (14%)	Corrosion Barrier	- PREN ≥35 (Pitting Resistance) - NACE MR0175 Certified for H2S Service - Min. Clad Thickness: 4mm

 

Critical Value for Coker Drum Service

 Eliminates Sulfur-Induced Failures

• Resists 480°C sulfur compounds (H2S, RSH, S2), reducing wall thinning by 90% vs. carbon steel.

• Withstands naphthenic acid + sulfur synergy corrosion.

• Certified for sulfide stress cracking (SSC) immunity per NACE MR0175/ISO 15156.

 Conquers Thermal-Mechanical Fatigue

• Matched thermal expansion coefficients (SA516Gr70: 12.5 μm/m·ºC; 2205: 13.5 μm/m·ºC) minimize thermal stress.

• High yield strength (2205: ≥450 MPa) prevents drum deformation.

 Withstands Decoking Operations

• Impact-resistant interface endures 2500 psi hydroblasting.

• Controlled hardness (22-28 HRC) prevents hydrogen-induced cracking (HIC).

 Lifecycle Economics

• 50% cost savings vs. solid 2205 duplex steel.

• 3x longer service life (>25 years) vs. carbon steel (5-8 years).

 

Technical Specifications

Parameter	Specification
Base Material	SA516Gr70 (ASME SA516/GB 713)
Clad Material	UNS S32205 / EN 1.4462
Bonding Process	Roll Bonding (ASME SA-264, EN ISO 23277)
Thickness Ratio	6:1 (Base:Clad) e.g., 48mm base + 8mm clad
Shear Strength	≥240 MPa (50% > base metal)
NDT	100% UT (bond integrity) + RT/PT
Dimensions	Thickness: 12-180mm Width: ≤4,500mm Length: ≤20,000mm

 

Target Applications in Coker Systems

• Drum Shells: Resists high-temperature sulfidation.

• Quench Zones: Defends against H2S + H2O + thermal shock.

• Heads & Transition Rings: Prevents stress corrosion cracking (SCC).

Field Validation:
*In major refinery upgrades:

• 40% longer decoking cycles

• Wall thinning rate <0.05mm/year

• Zero unplanned downtime due to corrosion*

 

Advantages vs. Alternatives

Solution	Roll-Bonded Clad (6:1)	Weld Overlay	Solid Duplex
Sulfur Resistance	Excellent	Good (Dilution risk)	Excellent
Thermal Fatigue	Excellent	Fair (Cracking risk)	Very Good
Pressure Integrity	Excellent (SA516Gr70)	Very Good (HAZ weakness)	Very Good (High cost)
Fabrication	Direct forming/welding	On-site welding	Special procedures

 

Quality Commitment

• Triple-Layer Assurance:

  1. Bond Integrity: Automated UT scanning (A/B/C-scan).

  2. Clad Verification: PMI + Ferrite Content (35-55%).

  3. Mechanical Testing: Shear/bend tests (ASTM A264).

• Certifications: ASME Sec. VIII Div.1, PED 2014/68/EU, ISO 3834.

• Full Traceability: Mill Test Certificates (EN 10204 3.2).

 

Redefine Coker Drum Reliability - Choose SA516Gr70+2205 Roll-Bonded Clad Plate (6:1) for:
 Sulfur Corrosion Immunity
 Thermal Cycle Resilience
 Decoking Impact Resistance
 Lifecycle Cost Savings

Contact our Materials Engineering Team for Technical Dossiers & Case Studies

OUR TEAM

FAQ
1.Q: How long is your delivery time?
A: Within 7-15 days after receiving the deposit or L/C at sight. Longer lead time will be required for special designed products.
2.Q: Do you provide samples ? is it free or extra charged?
A:Surely, product sample is complimentary but the delivery fee will be covered by our customers.
3.Q:What's your payment terms?
A:Our Payment trems will be
(1) 100% T/T
(2) 30% in advance,others before shipment.
4. how can we guarantee quality?
Always a pre-production sample before mass production;
Always final Inspection before shipment;
5.what can you buy from us?
Excellent quality steel at competitive prices