What is DIN1.4521 stainless steel?

DIN1.4521 steel belongs to high alloy ferritic stainless steel, compared with the commonly used steel SUS430:1. The chromium content is about 1.0% higher, and the alloying element molybdenum (Mo) is added, so the steel has good pitting corrosion resistance, crevice corrosion, stress corrosion resistance, and its corrosion resistance is even better than SUS304 and SUS316 in some fields. 2. The addition of titanium (Ti), niobium (Nb), zirconium (Zr) and other stabilizing elements, so the steel has good intergranular corrosion resistance and high temperature oxidation resistance. 2, use
The yield strength of DIN1.4521  is 1.5 times that of carbon steel and 6 times that of glass steel. It has outstanding advantages for earthquake resistance, snow resistance, wind pressure resistance and impact resistance. DIN1.4521 ferritic stainless steel high thermal conductivity, about 130% ~ 150% of chrome-nickel austenitic stainless steel, very suitable for the use of heat exchange. Small coefficient of thermal expansion, the small unit is only 60% ~ 70% of chrome-nickel austenitic stainless steel, very suitable for thermal expansion, cold contraction, thermal cycle conditions. The steel has good plasticity and toughness and is suitable for stretching, rolling forming and stamping. In particular, the application of corrosion resistance is the most excellent, in high chloride medium corrosion resistance performance is better than ordinary ferritic stainless steel and Olympic tensitic stainless steel, generally does not produce chloride stress corrosion crack. After adding Ni,Ti,Mo and other elements, the resistance of pore-corrosion and crevice corrosion is improved. The steel can be welded in the same way as ordinary stainless steel. The steel is especially suitable for food processing equipment, heat exchangers, water heater tanks, water storage tanks, solar panels and so on.

     

DIN1.4521 steel belongs to high alloy ferritic stainless steel, compared with the commonly used steel SUS430:

1. Chromium content is about 1.0% high, and the addition of alloy element Molybdenum (Mo), so the steel has good pitting corrosion, crevice corrosion, stress corrosion ability, its corrosion resistance in some areas even better than SUS304 and SUS316.

2. The addition of titanium (Ti), niobium (Nb), zirconium (Zr) and other stabilizing elements, so the steel has good intergranular corrosion resistance and high temperature oxidation resistance.

STANDARD:

JIS G 4304: Hot-rolled stainless steel plate, sheet and strip       

JIS G 4305: Cold-rolled stainless steel plate, sheet and strip       

JIS G 4317: Hot-formed stainless steel sections       

JIS G 4320: Cold-formed stainless steel sections  

Chemical composition of DIN1.4521 stainless steel sheet
C (％):     ≤ 0.025
Si (％):    ≤ 1.00
Mn (％):   ≤ 1.00
P (％) ≤:   0.040
S (％) ≤:   0.030
Cr (％):    17.0 ~ 20.0
Ni (％):     -
Mo (％):   1.75 ~ 2.50
N (%):     ≤ 0.025
Ti / Nb (%):  8 X ( C + N ) ~ 0.80



Mechanical properties of DIN1.4521 stainless steel sheet
HEAT TREATMENT PRACTICE
Condition: annealed
σb/≥ MPa: 410
σ0.2/≥ MPa: 245
δ ≥(％): 20.0
ф ≥ (％): -
Hardness | HBW ≤: 217

SUPPLIED FORMS

Sheet

Tube

Plate

BAR

APPLICATIONS

DIN1.4521 stainless steel is typically used in:

Bulk wet materials handling 

Vehicle frames/chassis

Rail car hoppers

Sweeper and glitter vehicles

Conveyors, chutes, screen, troughs

Bunkers & hoppers

Tanks & containers

Chimneys & ducting

Enclosures & cabinets

Walkways, stairs & railings

Cable trays

Tall oil distillation columns and equipments
Food processing equipments
Hydrometallurgy, heat exchangers
Oil and gas production equipments
Pulp mill bleach systems
Seawater handling equipments

PRODUCT DESCRIPTION
Wire rod: 0.10 ~ 15mm
Round bar: Diam.1.0 ~ 850mm
Flat / Square bar: T10 ~ 350mm X W15 ~ 1200mm
Heavy/middle plate via hot rolled: T6 - 200mm X W1000- 2500mm X L1000-12000mm
Sheet steel via cold rolled: T0.5 - 6mm X W600- 1000mm X L1000 - 2000mm
Steel strip via cold rolled: T0.1 - 3mm X W5 - 200mm X L (or in coil form)
Forging piece: stepped shafts with flanks / discs /tubes /slugs /donuts /cubes /other different shapes based on OEM.  

CORROSION RESISTANCE

DIN1.4521 stainless has 250 times the corrosion resistance of mild steels  and is particularly good in corrosion/abrasion applications.

 

 Corrosion/Abrasion

The cycle of abrasive removal of a metal surface following surface corrosion rapidly erodes mild/carbon steels even when costly coatings are applied.  In wet or damp conditions where abrasion is present type 444 provides excellent performance by resisting corrosion attack and thus maintaining better flow and slide-ability  compared to non-alloyed or low-alloy steels including abrasion resistant grades.

WELDABILITY

Type 00Cr18Mo2 has a fine-grained microcosmicture which reduces grain growth in the heat-affected zone (HAZ) and allow high integrity welds in section thicknesses up to 30 mm.  Suitable weld processes include SMAW, GTAW, FCAW, PAW, Laser, Spot and Seam.  Design and welding procedure consideration must be taken to avoid sensitization occurring in service.

 

 

COATING & PAINTING

Type DIN1.4521 provides good corrosion resistance and excellent abrasion resistance, hence does not need coating or painting systems to be applied for performance reasons.  For aesthetic reasons it may be desirable in some applications to apply paint, especially as type 444 will tend to discolour in corrosive conditions.  Type DIN1.4521 has exceptional under-paint corrosion resistance and will continue to resist corrosion even where the paint coat has been damaged.  Normal preparation is required, such as ensuring a clean surface free of grease and other contamination.  A primer coat is recommended for cold-rolled material due to its smoother surface, but hot rolled 1D finish material may be suitably painted in a single coat.

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Company profile

Luoyue Precision Metal established in 2018, is a leading Stockists and global distributor for Metal Raw Materials like Steel/Aluminum/ Stainless steel/Copper/ Nickel Rods, Bars, Plates, Sheets,Pipes, fittings, fasteners, Inconel alloys, Wire and Wire-Mesh to customers from aerospace, automotive, electronics, precision manufacturing, ordnance, marine, shipbuilding, oil & gas, power plant and construction.

The company has a high-precision, high-efficiency modern processing site, CNC machine tools and complete testing and inspection technology, and introduces international advanced technologies.

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