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Hydrogen-Induced Cracking (HIC) poses a significant challenge in industries like oil, gas and petrochemicals, where equipment operates in sour (H2S-rich) environments. Without proper safeguards, hydrogen absorption into steel can lead to severe cracking and eventual equipment failure.
CarElso HIC Premium+ is a high-performance steel plate engineered to address hydrogen-induced cracking with exceptional precision. Developed to comply with the most rigorous industry standards, this solution ensures optimal safety, reliability and performance.
- Very low sulphur (S<=0.001%), oxygen (O<0.0015%), and phosphorus (P<=0.008%, typically 0.006%)
- Controlled chemical composition with optimised alloying guaranteeing low carbon equivalent (CEq) values while maintaining all required mechanical characteristics (typical CEq range is 0.38 to 0.45 depending on thickness and delivery conditions).
- Very low inclusion content
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The Technical Background
Steel in contact with water containing H2S will corrode, producing hydrogen at its surface. H2S not only inhibits the formation of hydrogen gas, reducing the opportunity for it to escape, but promotes its absorption into the steel. At typical working temperatures below 200 degrees Celsius hydrogen atoms can become trapped causing embrittlement and ultimately cracking.
H2S is responsible for numerous types of problems in steels including hydrogen induced cracking (HIC), sulphide stress cracking (SSC), and stress oriented hydrogen induced cracking (SOHIC). In order to provide better H2S resistance the properties of C-Mn steels have been progressively developed to improve chemistry, cleanliness, homogeneity and microstructure.
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CarElso HIC Premium+
Industeel, a subsidiary of Arcelor Mittal Group, specialises in advanced technology carbon steel, alloy and stainless steel plates and supplies high H2S-resistant pressure vessel steel plates under its CarElso brand name. In order to facilitate product specification and procurement it has refined, fine-tuned, and optimised its offer under the brand name CarElso HIC Premium+.
Industeel’s steel making includes vacuum ladle refining after electric arc furnace melting of selected scrap enabling the making of very high quality C-Mn steel . Soft-reduction continuous casting or ingot casting under argon protection with optimised mould shape, controls solidification conditions and limits the occurrence of segregation.
At the final stage of fabrication proper post weld heat treatment (PWHT) of the equipment is strongly recommended. CarElso HIC Premium+ manufactured as C-Mn normalised pressure vessel grades, typically according to ASTM A516 or ASME SA516, requires PWHT in the range 595 to 610 degrees Celsius and this is completely sufficient to achieve the proper mechanical properties, hardness levels and H2S resistance.
Hydrogen induced cracking is of such significance that numerous material specifications have been developed by oil companies and engineering companies. CarElso HIC Premium+ is designed so that it is compatible with the most stringent of these including Petrobras N1706, Saudi Aramco 01-SAMSS-016, EEMUA 179, Axens IN-43, Shell MESC 74/125, Shell DEP 31.22.10.32, etc.
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Key Features of CarElso HIC Premium+
CarElso HIC Premium+ is a high-quality steel plate engineered for resistance in challenging H2S environments. Key highlights include:
- HIC Resistance: Plates are specifically manufactured to resist cracking caused by hydrogen absorption in aqueous H2S conditions.
- Rigorous Testing Standards: Fully tested to NACE TM 0284-03 Solution A, with guaranteed performance metrics:
- Crack Length Ratio (CLR) ≤ 5%
- Crack Thickness Ratio (CTR) ≤ 1.5%
- Crack Sensitivity Ratio (CSR) ≤ 0.5%
- Wide Dimensional Range: Available in thicknesses between 6 mm to 200 mm, widths of up to 4000 mm, and lengths of up to 14000 mm.
- Low Inclusion Content: Optimised with:
- Sulphur (S) ≤ 0.001%
- Phosphorus (P) ≤ 0.008%
- Oxygen (O) ≤ 0.002%
- Enhanced Weldability: Low carbon equivalent values (Ceq ≤ 0.45%) ensure ease of processing and reliable weld integrity.
- Certified Grade Compliance: Triple-certified under ASTM/ASME A/SA 516 Grades 60, 65, and 70, with full EN 10204 3.2 certification via internationally recognised inspection bodies.
- Oil & Gas Specifications Compatibility: Compatible with requirements from leading names, such as Petrobas, Saudi Aramco, Shell, AXENS, and EEMUA.
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Our offer
CarElso HIC Premium+ is available directly from the manufacturer but when requirements are relatively small or are needed very quickly it is necessary to have a distributor to supply the product from stock. Brown McFarlane is an Industeel-authorised supplier of CarElso HIC Premium+ and with plate stocks from 6 mm to 180 mm thick based in the UK, it can supply the right plates at the right time anywhere in the world. Compatibility with the world’s most frequently requested HIC specifications ensures that there is no need for costly and time consuming additional testing: the plate is off the shelf and ready to use.
General Supply Conditions
Normalized 920°C. The material surface is shot blasted to SA 2.5, with low-stress die stamping at two locations: head and foot of plate. In addition, the material has identification paint markings on one end and shipping marks. Plates have continuous brand marked on the two long edges.
processing:
• High Definition Plasma: 16m x 4m
• Oxy/Propane: 50m x 6m
• Plate Rolling/Dished EndsNDT
Ultrasonic testing control as per SA 578 level C with +75mm pitch scanning and +100mm² max defect area.All material is made with an Electric Arc Furnace, fully killed, vacuum degassed, with fine grain.
Applications
- Condensers
- Dished ends
- Flanges
- Filters
- Heat exchangers
- Line pipe
- Pressure vessels
- Valves
Our range…
Grades
ASME/ASTM SA/A 516 Grades 60/65/70
See table below for sizes…..
| Thickness | Length | Width |
|---|---|---|
| 6/8/10/13/16/20/25/30/35/40mm | 12000mm | 2000/2500/3000mm |
| 45/50mm | 9000mm | 2500/3000mm |
| 55/60/65/70/75/80mm | 7000mm | 2000/2500mm |
| 90-200mm | 6000mm | 3000mm |
