High Strength 409 Stainless Steel Plate

409 stainless steel is a ferritic steel known for its commendable mechanical properties and high-temperature corrosion resistance. With a chromium content of 11%, it meets the minimum requirement for forming the passive surface film that imparts corrosion resistance to stainless steel.

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409 Stainless Steel Plate Description

The distinctive chemical composition of 409 stainless steel distinguishes it from other stainless steel types. Primarily comprised of iron, it contains significant amounts of chromium, along with small quantities of carbon, manganese, silicon, and nitrogen. Iron serves as the primary element, contributing to the steel’s strength and stability. Chromium provides corrosion resistance and aids in forming a protective oxide layer on the surface. Carbon enhances hardness and wear resistance, while manganese acts as a stabilizer to prevent excessive grain growth during heat treatment. Silicon improves oxidation resistance and minimizes scaling at high temperatures, and nitrogen enhances mechanical properties such as tensile strength and yield strength. This unique blend of elements grants 409 stainless steel exceptional thermal expansion capabilities, making it suitable for high-temperature applications without compromising structural integrity or dimensional stability. Additionally, its chemical composition facilitates good solderability, simplifying the manufacturing process.

Product Parameters

Product Name	409 Stainless Steel Plate
Type	Plate
Thickness	0.3mm-200mm
Length	2000mm, 2438mm, 3000mm, 5800mm, 6000mm, 12000mm, etc.
Width	40mm-600mm, 1000mm, 1219mm, 1500mm, 1800mm, 2000mm, 2500mm, 3000mm, 3500mm, etc.
Standard	ASTM, AISI, JIS, GB, DIN, EN, etc.
Surface	BA, 2B, NO.1, NO.4, 4K, HL, 8K, etc.
Scope of Application	Widely used in high temperature and electrical industry, medical equipment construction, chemical, food industry, agriculture and ship parts, food and beverage packaging, Kitchen supplies, trains, airplanes, conveyor belts, vehicles, bolts, nuts, springs and screens, etc.
Certificate	ISO, SGS, BV, etc.
Production Technology	Hot Rolling, Cold Rolling
Edge Processing	Edging, Trimming

Chemical Composition

C	Si	Mn	Cr	Ni	S	P
≤ 0.08	≤1.0	≤1.0	10.5～11.75	≤ 0.5	≤ 0.045	≤ 0.045

Mechanical Properties

Tensile Strength Kb (MPa)	Yield Strength σ0.2 (MPa)	Elongation D5 (%)	Hardness
≥360	≥175	≥25	≤ 162HBW

Physical Performance

Density(g/cm³)	Modulus of Elasticity(Gpa)	Coefficient of Thermal Expansion(10-6/°C)	Coefficient of Thermal Conductivity(W/m*K)	Resistivity(NΩ.m)
7.80	200	11.0	25.8	600