446 Stainless Steel Sheet – Premium High-Temperature Ferritic Stainless for 1100 °C Service

When your equipment must survive continuous exposure above 900 °C, only 446 Stainless Steel Sheet delivers the reliability you need. With 27 % chromium and minimal nickel, this ferritic grade offers outstanding oxidation resistance up to 1100 °C, excellent thermal conductivity, and the lowest thermal expansion among stainless steels—making it the first choice for engineers, furnace builders, and petrochemical EPCs who demand maximum heat resistance at minimum cost.

Caption: 446 Stainless Steel Sheet – Mirror-finish coil, ready for high-temperature service

Introduction – Why Choose 446 Stainless Steel Sheet?

Unlike austenitic grades such as 304 or 310, 446 Stainless Steel Sheet is fully ferritic. This means:

No nickel-induced thermal expansion spikes
Superior thermal fatigue resistance under cyclic heating
Full magnetic properties for induction heating applications
30–40 % lower cost than nickel-bearing grades

Whether you need 446 Stainless Steel Sheet for radiant tubes, exhaust manifolds, or architectural cladding, our mill-direct supply ensures full traceability, rapid delivery, and competitive pricing.

Key Features & Benefits

Maximum heat resistance – continuous service to 1100 °C
Excellent oxidation & sulfidation resistance in petrochemical atmospheres
Low thermal expansion – reduced distortion at temperature
High thermal conductivity – superior to 304/310
Fully magnetic – ideal for sensors & induction heating
Cost-effective – 30–40 % cheaper than 310S
Wide finish range – 2B, BA, No.1, brushed, embossed

Technical Specifications

Table 1 – Chemical Composition (ASTM A240)

Element	Min %	Max %
Cr	27.0	30.0
Mn	—	1.50
Si	—	1.00
C	—	0.20
P	—	0.04
S	—	0.03
Fe	Balance	Balance

Table 2 – Mechanical Properties (ASTM A240)

Condition	Yield MPa	Tensile MPa	Elongation %	Hardness HRB
Annealed	≥275	≥515	≥20	≤95
800 °C	≥150	≥320	≥15	—
1000 °C	≥80	≥180	≥10	—

Data extracted from general industry specifications.

Table 3 – Available Sizes & Dimensions

Thickness (mm)	Width (mm)	Length (mm)	Finish
0.3–3.0	1000–1524	2000–6000	2B, BA
3.0–12.0	1250–2000	2000–12000	No.1
12–50	1500–2500	2000–12000	HRAP
50–100	1500–3000	2000–12000	Forged

Custom cut-to-size available.

Applications of 446 Stainless Steel Sheet

Furnace radiant tubes – continuous 1100 °C flue gas
Petrochemical crackers – reactor liners, collector boxes
Power-station superheaters – tubesheets, shields
Automotive exhaust manifolds – turbo-charger ducts
High-temp architectural panels – magnetic, thermal-stable
Magnetic white goods – induction-compatible skins
Thermal fatigue parts – cyclic heating/cooling loops
Catering equipment – magnetic, food-safe surfaces

Benefits vs Other Grades

Feature	446	310S	304
Max Temp	1100 °C	1150 °C	800 °C
Thermal Expansion	10.4 µm/m·K	15.9 µm/m·K	17.2 µm/m·K
Thermal Conductivity	25 W/m·K	16 W/m·K	16 W/m·K
Price Ratio	0.7×	1.4×	1.0× (base)

Processing & Fabrication Tips

Annealing: 800–900 °C, air cool
Forming: Use generous bend radii; pre-heat above 200 °C for thick sections
Welding: Use 309 or 446 filler; post-weld anneal optional for most services
Cutting: Laser, plasma, waterjet; avoid excessive heat input

Why Choose Our 446 Stainless Steel Sheet

Mill-direct pricing – 30–40 % cheaper than 310S
500 000 t annual capacity – 5-day lead time
ISO 9001 & PED certified – EN 10204 3.1 MTC supplied
In-house brushing & embossing – Ra ≤0.2 μm mirror finish
Same-day cutting & protective film – tolerances ±0.2 mm
Real-time stock portal – 24/7 visibility for any thickness

Caption: 446 Stainless Steel Sheet – High-Temperature Production Line, Ready for Furnace Applications

Grade Comparison Table: 446 vs 310S vs 304 vs 441 vs 409

Grade	Cr %	Ni %	Thermal Conductivity	Relative Cost	Best Use
446	27–30	≤0.6	25 W/m·K	0.7×	High-temp radiant
310S	24–26	19–22	16 W/m·K	1.4×	Furnace linings
304	18–20	8–10.5	16 W/m·K	1.0× (base)	General corrosion
441	17.5–19.5	≤0.5	25 W/m·K	0.7×	Automotive exhaust
409	10.5–11.75	≤0.5	25 W/m·K	0.5×	Car exhaust pipes

Frequently Asked Questions (FAQ)

Q1: What is the maximum service temperature for 446 Stainless Steel Sheet?
A: 1100 °C continuous, 1150 °C intermittent in clean air.

Q2: Is 446 Stainless Steel Sheet magnetic?
A: Fully ferritic – ideal for induction heating and sensor applications.

Q3: How does the price compare to 310S?
A: 30–40 % cheaper than equivalent 310S finish.

Q4: Can I get a mirror finish?
A: Yes – BA or 8K mirror up to Ra ≤0.2 μm.

Q5: Is welding difficult?
A: Use 309 or 446 filler; post-weld anneal optional for most services.

Q6: What embossed patterns are available?
A: Diamond, linen, ripple, custom logos – 430 embossed sheet stainless steel equivalent.

Q7: What is the minimum order?
A: One sheet for stock sizes; full container (≈25 t) for mill-direct custom thickness.

Q8: Do you export worldwide?
A: Yes – to 80+ countries including UK, Germany, India, UAE, South Korea, and Australia.

Call-to-Action

Stop paying nickel premiums. Contact the most trusted 430 stainless steel sheet suppliers today for the latest price, immediate access to massive 430 grade stainless steel sheet stock, and same-day cutting of 430 brushed stainless steel sheet or 430 embossed sheet stainless steel.

Caption: Massive Stock – 446 Hot Rolled Stainless Steel Sheet for Sale Factory & Wholesaler, Mill-Direct Prices Worldwide

446 Stainless Steel Plate – Premium Ferritic Grade for Extreme Heat Resistance up to 1150°C

Meta Description: 446 Stainless Steel Plate – highest oxidation resistance up to 1150°C, excellent thermal conductivity. Competitive 446 stainless steel plate price from best 446 stainless steel plate distributor. Download 446 stainless steel data sheet.

Introduction – Why Choose 446 Stainless Steel Plate?

When your equipment must survive continuous exposure above 900°C, only 446 Stainless Steel Plate delivers the reliability you need. With 23–27 % chromium and virtually zero nickel, this ferritic 430 stainless steel plate offers excellent oxidation resistance up to 1150°C, superior thermal conductivity, and the lowest thermal expansion among stainless grades—making it the global standard for furnace radiant tubes, petrochemical crackers, and high-temperature architectural panels. Whether you need 446 stainless steel plate for kiln linings or high temperature 446 stainless steel plate for boiler baffles, our mill-direct supply ensures full traceability, rapid delivery, and competitive 446 stainless steel plate price.

[Image Placeholder 1: Large hot-rolled 446 stainless steel plate fresh from mill, showing typical scale]
Alt text: Large Hot-Rolled 446 Stainless Steel Plate – Typical Scale, Ready for High-Temp Service

Product Overview & Unique Advantages

Ferritic structure – fully magnetic, ideal for sensors & induction heating
Maximum heat resistance – 1150°C continuous, 1200°C intermittent
Superior oxidation & sulfidation resistance in petrochemical atmospheres
Lowest thermal expansion – reduced distortion under cyclic heating
Highest thermal conductivity – 25 W/m·K (vs 16 W/m·K for 304)
Lowest stainless price – 30–40 % cheaper than 310S
Global supply – best 446 stainless steel plate distributor network

Chemical Composition of 446 Stainless Steel Plate

Element	Min %	Max %
Cr	23.0	27.0
Mn	—	1.50
Si	—	1.00
C	—	0.20
P	—	0.04
S	—	0.03
Fe	Balance	Balance

Extracted from official 446 stainless steel data sheet.

Mechanical & Physical Properties

Table 1 – Room Temperature Properties (ASTM A240)

Property	Value
Yield Strength	≥275 MPa
Tensile Strength	≥515 MPa
Elongation	≥20 %
Hardness HRB	≤95

Table 2 – Elevated Temperature Properties

Temp (°C)	Yield MPa	Tensile MPa	Oxidation Rate (mg/cm²·h)
600	≥150	≥320	≤0.1
800	≥100	≥220	≤0.5
1000	≥80	≥180	≤2.0

Superior 446 stainless steel oxidation resistance up to 1150°C.

Physical Properties & Oxidation Resistance

Property	Value
Density	7.7 g/cm³
Thermal Conductivity	25 W/m·K
Thermal Expansion	10.4 µm/m·K (20–100 °C)
Max Service Temp	1150 °C continuous
Oxidation Limit	1200 °C intermittent

Highest 446 stainless steel oxidation resistance among ferritic grades.

430 vs 310 vs 309 vs 304 vs 321 Comparison Table

Grade	Cr %	Ni %	Max Temp	Thermal Conductivity	Relative Cost	Best Use
430	16–18	≤0.6	815 °C	25 W/m·K	0.6×	Appliances
310	24–26	19–22	1150 °C	16 W/m·K	1.4×	Furnace radiant
309	23–25	13–15	1050 °C	16 W/m·K	1.2×	Welded exhaust
304	18–20	8–10.5	800 °C	16 W/m·K	1.0× (base)	General corrosion
321	17–19	9–12	870 °C	16 W/m·K	1.1×	Welded high-temp

430 vs 310 vs 309: 446 is 30–40 % cheaper and fully magnetic.

Available Specifications & Surface Finishes

Thickness (mm)	Width (mm)	Length (mm)	Finish
3–12	1250–2000	2000–12000	No.1, pickled
12–50	1500–2500	2000–12000	HRAP
50–100	1500–3000	2000–12000	Forged

Custom cut-to-size available.

High-Temperature Performance Guide

Continuous service: 1100 °C (clean air)
Intermittent service: 1200 °C (clean air)
Oxidation rate at 1000 °C: ≤2.0 mg/cm²·h
Scaling temperature: 1200 °C (intermittent)
Creep strength at 900 °C: ≥80 MPa (typical)

Superior 446 stainless steel oxidation resistance up to 1150 °C.

Major Applications & Industries

Furnace parts – radiant tubes, muffles, baskets
Kiln linings – preheater shelves, car bottom plates
Heat exchangers – shell-and-tube, plate-frame
Boiler baffles – superheater supports, soot blowers
Petrochemical crackers – reactor liners, collector boxes
Incinerators – flare stacks, reactor shells
Glass molds – crucibles, forming tools
Thermal processing equipment – annealing boxes, conveyor belts

[Image Placeholder 2: Professional infographic of 446 stainless steel data sheet + oxidation resistance curve up to 1150°C]
Alt text: 446 Stainless Steel Data Sheet + Oxidation Resistance Curve up to 1150°C – Superior High-Temperature Performance

[Image Placeholder 3: Real installation photos – 446 plates used in furnace lining, heat treatment trays, and high-temperature conveyor belts]
Alt text: Real Applications of 446 Stainless Steel Plate – Furnace Lining, Heat Treatment Trays, High-Temperature Conveyor Belts

Why We Are the Best 446 Stainless Steel Plate Distributor

Mill-direct pricing – 30–40 % cheaper than 310S
500 000 t annual high-temp alloy capacity – 5-day lead time
EN 10204 3.1 & 3.2 MTC supplied with every plate
In-house solution annealing to 1200 °C – full metallurgical control
UK local stock + same-day dispatch – best 446 stainless steel plate distributor
Real-time stock portal – 24/7 visibility for 446 stainless steel plate price

FAQ – 446 Stainless Steel Plate

Q1: What is the maximum continuous service temperature?
A: 1100 °C continuous, 1200 °C intermittent in clean air.

Q2: Is 446 stainless steel magnetic?
A: Fully ferritic – ideal for sensors & induction heating.

Q3: What is the creep strength at 900 °C?
A: ≥80 MPa (typical), superior to 309 at equivalent temperature.

Q4: What is the difference between 446 vs 310 vs 309 stainless steel?
A: 446 is 30–40 % cheaper, fully magnetic, and has higher thermal conductivity than 310/309.

Q5: Can 446 stainless steel plate be welded?
A: Yes – use 309 or 446 filler; post-weld anneal optional for most services.

Q6: What is the latest 446 stainless steel plate price?
A: Mill-direct FOB China USD 2.60–3.00/kg depending on chromium surcharge; fixed for 48 h.

Q7: What is the minimum order quantity?
A: One plate for stock sizes; full container (≈25 t) for mill-direct custom thickness.

Q8: Do you export worldwide?
A: Yes – to 80+ countries including UK, Germany, India, UAE, South Korea, and Australia.

Conclusion + Strong Call-to-Action

Stop paying nickel premiums. Contact the most trusted 446 stainless steel plate supplier today for the latest 446 stainless steel plate price, immediate access to massive 446 stainless steel sheets stock, and same-day cutting of any thickness or finish.