431

Stainless Steel Square Bar-431

Stainless Steel Square Bar-431

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 .

431 series is a kind of steel with better strength and toughness among martensitic stainless steels. It has good corrosion resistance to oxidizing acids, most organic acids and aqueous solutions of organic salts. It is generally suitable for the production of nitric acid and acetic acid, as well as shafts, piston rods, pumps and other parts that require both toughness and corrosion resistance in light industry, textile and other industries.
The Cr steel containing Ni in the 431 stainless steel plate can obtain high mechanical properties through heat treatment, and its corrosion resistance is better than that of 410 steel and 430 steel. 431 stainless steel corresponds to China 1Cr17Ni2, Japan JIS SUS431.

Equivalent Material of Stainless Steel square bar

Grade UNS No. Old British Euronorm China GB Japanese JIS
BS EN No. Name
431 S43100 431S29 57 1.4057 X17CrNi16-2 1Cr17Ni2 SUS 431

Standard Specification Of 431 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
431 Min. / / / / / 15 / 1.25 /
Max. 0.2 1 1 0.04 0.03 17 2.5
Grade Tensile Strength
(MPa) 
Yield Strength
0.2% Proof (MPa) 
Elongation
(% in 50mm)
Hardness
Rockwell B(HR B) Brinell(HB)
431 635 440 20 220

431 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

431 Stainless Steel square bar Price List 431 Stainless Steel square bar FOB Shanghai Per Unit (USD)
431 stainless steel black square bar $1550.00-$2050.00
431 stainless steel bright square bar $1850.00-$2350.00
431  stainless steel pickling square bar $1550.00-$2050.00

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