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TP430

TP430, UNS S43000, 1.4016, X6Cr17, 1Cr17

430 is a chromium ferritic stainless steel with moderate corrosion and heat resistance. It is non-hardenable by heat treatment. 430 is magnetic and exhibits good ductility. It can be readily formed into many desired shapes.

430 is a low carbon ferritic stainless steel, its corrosion resistance in mild corrosive environment or atmosphere is similar to some Ni-containing stainless steel, and has oxidation resistance at high temperature. 430 is ductile, low work hardening rate, and can be formed by rolling or drawing processes.

Its typical applications include furnace combustion chambers, gas burners on heating units, downspouts etc. Industrial and commercial applications range from interior architectural applications to nitric acid plant equipment, oil refinery equipment, etc.

430 resists corrosion from the atmosphere, fresh water and steam, foodstuffs, dairy products, nitric acid and many petroleum products and organic materials. Its resistance to chloride-stress-corrosion cracking at elevated temperatures is far superior to that of austenitictypes 304 and 316.

Tensile Strength: 60 KSI min (415 MPa min)

Yield Strength(0.2% Offset): 35 KSI min(240 MPa min)

Elongation: 20% min

Hardness: HRB90 (190HB) max.

430 shall be annealed in the temperature range 1450-1550°F(788-843°C), cooled with the furnace at a rate of 50°F per hour to 1100°F(593°C), then air cooled. If thin material,the annealing temperature does not exceed 1450°F(788°C), air cooling can be used instead of on-furnace cooling.The annealing scale should be removed after each treatment. This can be done by pickling in 50% hydrochloric acid heated to 140/150ºF (60/65ºC). Wash and passivate.AnnealingTP430 does not produce a phase transition, but is used only to soften it sufficiently and to achieve maximum ductility. These materials produce an oxide film colour after annealing and must be removed for maximum corrosion resistance.

(1)Hot formed, annealed, descaled

(2)Cold worked and bright annealed

Chemical composition

Tension

Hardness

Flaring

Flange

Flattening

Micro structure

Hydrostatic

NDT

Intergranular Corrosion

Surface condition

Shape and dimension

Positive Material Identification