444

Stainless Steel Square Bar-444

Stainless Steel Square Bar-444

According to the production process, stainless steel rods can be divided into three types: hot rolling, forging and cold drawing. The specification of hot rolled stainless steel round bar is 5.5-250 mm. Among them: 5.5-25mm small stainless steel round bars are mostly supplied in bundles of straight strips, which are often used as steel bars, bolts and various mechanical parts; stainless steel round bars larger than 25mm are mainly used for the manufacture of mechanical parts or as seamless steel pipe billets .

444 steel is a high-alloy ferritic stainless steel. Compared with the commonly used steel grade SUS430: 1. The chromium content is about 1.0% higher, and the alloying element molybdenum (Mo) is added, so this steel has good pitting corrosion resistance, Crevice corrosion and stress corrosion resistance, and its corrosion resistance is even better than SUS304 and SUS316 in some fields. 2. Stabilizing elements such as titanium (Ti), niobium (Nb), and zirconium (Zr) are added, so this steel has Good resistance to intergranular corrosion and high temperature oxidation.
SUS444 (00Cr18Mo2) is an ultra-low carbon nitrogen, 18% chromium and 2% molybdenum, ferritic stainless steel with high corrosion resistance.

Equivalent Material of Stainless Steel  square bar

Grade UNS No. Old British Euronorm China GB Japanese JIS
BS EN No. Name
444 S44400  -  1.4521N  -  - 00Cr18Mo2 SUS 444

Standard Specification Of 444 square bar

Specifications ASTM A276
Diameter 3、5、6、7、8、9、10、12、15、18、20、25、30、35、40、50、100、200etc
Length 2000mm, 2500mm, 3000mm,3500mm, 4000mm 5000mm 6000mm 10000mm 12000mm etc
Surface Black 、 bright、 pickling 、etc
Finish Hot rolled plate (HR), Cold rolled sheet (CR), 
Form Rod, Round, Channel Bar, Rings, Round Rod, Triangle, Hollow, Rectangle, T-Bar, Flat Bar, Precision Ground Bar, Blocks, Square, Threaded, Hex (A/F), Profiles, Half Round Bar, Ingot, Billet, I/H Bar, Forging etc.

Stainless steel composition content.

Grade C Mn Si P S Cr Mo Ni N
444 Min. / / / / / 16 / / /
Max. 0.025 2 1 0.045 0.03 18.5 1 /
Grade Tensile Strength
(MPa) 
Yield Strength
0.2% Proof (MPa) 
Elongation
(% in 50mm)
Hardness
Rockwell B(HR B) Brinell(HB)
444 415 275 20 95  -

444 Characteristic machining technology

1D -- The surface has discontinuous granular shape, also known as fog surface.
Processing technology: hot rolling + annealing shot peening pickling + cold rolling + annealing pickling.
2D - A slightly silvery white colour.
Processing technology: hot rolling + annealing shot peening pickling + cold rolling + annealing pickling.
2B -- Silver white with better gloss and flatness than a 2D surface.
Processing technology: hot rolling + annealing shot peening pickling + cold rolling + annealing pickling + quenching and tempering rolling.
Ba - Excellent surface gloss, high reflectivity, like a mirror surface.
Processing technology: hot rolling + annealing shot peening pickling + cold rolling + annealing pickling + surface polishing + quenching and tempering rolling.
No.3 -- Good gloss, coarse grain surface.
Processing technology: polishing and tempering rolling for 2D or 2B with 100~120 abrasive materials (JIS R6002).
No.4 -- Good gloss, fine lines on the surface.
Processing process: polishing and tempering rolling for 2D or 2B with 150~180 abrasive materials (JIS R6002).
HL -- Silver grey with hair streaks.
Processing technology: 2D products or 2B products with appropriate granularity of abrasive materials for polishing the surface is a continuous abrasive grain.
MIRRO -- Specular.
Processing technology: 2D products or 2B products with appropriate granularity of the grinding material grinding and polishing to the mirror effect.

Stainless Steel square bar Price List

444 Stainless Steel square bar Price List 444 Stainless Steel square bar FOB Shanghai Per Unit (USD)
444 stainless steel black square bar $1550.00-$2050.00
444 stainless steel bright square bar $1850.00-$2350.00
444  stainless steel pickling square bar $1550.00-$2050.00

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