Steel Industry Glossary
- 3.1 Certificate
- A type of inspection certificate per EN 10204 where the manufacturer confirms material properties based on specific inspection of the supplied product.
- ASME SA 240
- ASME specification for chromium and chromium-nickel stainless steel plate, sheet, and strip for pressure vessels and general applications.
- ASTM A516
- Standard specification for pressure vessel plates, carbon steel, for moderate- and lower-temperature service. Grades 60 and 70 are most common.
- BQ Plate
- Boiler Quality plate, manufactured to standards like SA 516, IS 2002, IS 2062, used in pressure vessel and boiler applications.
- Charpy Impact Test
- A standardized test measuring the energy absorbed by a material during fracture at specified temperatures. Critical for low-temperature service applications.
- Clad Plate
- A composite plate consisting of a base metal (usually carbon steel) bonded with a corrosion-resistant alloy layer (stainless steel, nickel alloy) for cost-effective corrosion protection.
- Duplex Steel
- A family of stainless steels with a mixed microstructure of approximately equal proportions of austenite and ferrite, offering superior strength and corrosion resistance.
- ERW Pipe
- Electric Resistance Welded pipe — manufactured by rolling steel coil and welding the seam using electric resistance. Used for structural and low-pressure applications.
- HIC Test
- Hydrogen Induced Cracking test per NACE TM0284, used to evaluate the resistance of steel plates to cracking caused by hydrogen absorption in sour environments.
- Hardox
- A brand of abrasion-resistant (AR) steel plates made by SSAB, known for combining high hardness with good toughness. Grades include Hardox 400, 450, 500.
- IBR
- Indian Boiler Regulations — statutory regulations governing the manufacture and supply of boiler components in India. IBR-approved materials carry official stamps.
- IGC Test
- Intergranular Corrosion test (ASTM A262 Practice E) — evaluates the susceptibility of austenitic stainless steels to intergranular corrosion due to sensitization.
- MTC
- Mill Test Certificate — a quality assurance document provided by the material manufacturer, confirming chemical composition and mechanical properties as per EN 10204 3.1.
- NACE MR0175
- Standard from NACE International specifying material requirements for resistance to sulfide stress cracking in sour (H2S) environments.
- PED
- Pressure Equipment Directive (2014/68/EU) — European directive ensuring safety of pressure equipment. Materials must be sourced from PED-approved manufacturers.
- PMI
- Positive Material Identification — a non-destructive testing method using XRF or OES analyzers to verify the chemical composition of materials.
- PRE Number
- Pitting Resistance Equivalent — a formula (Cr + 3.3Mo + 16N) used to compare the pitting corrosion resistance of stainless steel grades.
- Super Duplex
- High-performance duplex stainless steels (e.g., UNS S32750) with PRE > 40, offering exceptional corrosion resistance in chloride environments.
- UT/UTN
- Ultrasonic Testing / Ultrasonic Testing for Notch — NDT method for detecting internal flaws, laminations, and inclusions in steel plates and pipes.
- Werkstoff Number
- German material numbering system (e.g., 1.4301 for SS 304). Used extensively in European specifications alongside UNS numbers.