AISI 201 1.4372 SUS201 Austenitic Stainless Steel

Product Overview

AISI 201 is a high-value chromium-nickel-manganese austenitic stainless steel, engineered as an economical alternative to AISI 304 for low-corrosion environments. Featuring moderate corrosion resistance, excellent formability, reliable weldability and a low nickel content, it is standardized across global steel specifications, making it a universal material for cross-border projects, budget-conscious production and general-purpose applications.

Ideal for scenarios where high corrosion resistance is not a core requirement, AISI 201 balances performance and cost, and is the preferred material for kitchenware, architectural decoration, light industry and manufacturing.

Global Steel Grade Equivalents

AISI 201 and its international equivalents maintain consistent core performance while adapting to regional standardization requirements, with the following one-to-one correspondence:

Product Features

Chemical Composition

The chemical composition of AISI 201 and its equivalents is precisely calibrated to ensure structural stability and processability, with strict control over impurity content (P/S) to avoid performance degradation. Regional standards have minor optimized limits for partial elements to adapt to local application needs:

Mechanical Properties

AISI 201 and its equivalents deliver stable and reliable mechanical performance, meeting the load, forming and welding requirements of general-purpose applications. Mechanical indicators vary slightly by regional standard and product size, with detailed parameters as follows:

Basic Mechanical Properties (GB/T1220 & JIS G4303)

Applicable to 12Cr17Mn6Ni5N/1Cr17Mn6Ni5N and SUS201, the core mechanical property minimum requirements:

Mechanical Properties of EN 1.4372 (EN10088-3-2014)

Classified by product diameter, with different requirements for elongation and impact value, adapting to the structural use of different sizes:

High-Temperature Proof Strength (EN10088-3-2014, +AT: Solution Annealed)

X12CrMnNiN17-7-5/1.4372 maintains excellent strength retention at medium and low temperatures, suitable for mild high-temperature working conditions (≤350℃):

Sample Material Certificate

We provide official Material Test Certificate (MTC) for all AISI 201 products, including complete test data of chemical composition, mechanical properties, ultrasonic testing and heat treatment status, complying with international standard requirements and supporting third-party inspection.

Supply Size, Tolerance & In-Stock Specifications

Qilu Steel provides a full range of AISI 201 product forms, with complete stock specifications and customizable non-standard sizes, supporting fast delivery and on-demand cutting. The monthly stock of hot-rolled and forged bars exceeds 10,000 tons, meeting the bulk procurement needs of customers.

Standard Supply Size & Length

Surface Finish & Dimensional Tolerance

Strict control of tolerance and straightness to ensure processing accuracy, with different finish options for functional and decorative applications:

In-Stock Diameter Specifications

• Hot Rolled Bar: 10, 12, 15, 18, 20, 22, 25, 28, 30, 32, 35, 38, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, 105, 110, 120, 130, 140, 150, 160, 170, 180, 190mm

• Hot Forged Bar: 200, 210, 220, 230, 240, 250, 260, 270, 280, 290, 300, 310, 320, 330, 340, 350, 360, 370, 380, 390, 400mm

Note: Stock specifications are updated in real time. Please contact our sales team for the latest stock availability and detailed quotation.

Non-Destructive Testing

All AISI 201 forged and rolled products undergo strict ultrasonic testing (UT) to eliminate internal defects and ensure material integrity, complying with the following international standards:

• EN10228-3 Class III

• Sep 1921-84 D/D

We also support customized non-destructive testing (e.g., MT/PT) according to customer project requirements.

Steel Making & Forging Process

Adopt advanced smelting and forging technology to ensure the purity, density and structural uniformity of AISI 201 steel, laying a solid foundation for excellent mechanical properties and processability.

Steel Making Process

Multiple smelting processes are available to adapt to different quality requirements and application scenarios:

• EF+LF+VD

• EAF+LF+VD

• EF+LF+VD+ESR

• EAF+LF+VD+ESR

Forging Processing

• Hot forging temperature: 850-1150℃

• Cooling method: Air cooling

• Forging ratio: Strictly controlled to ensure uniform grain and excellent mechanical performance.

Heat Treatment

AISI 201 supports two main heat treatment processes, which can be optimized according to processing needs and application scenarios to adjust material performance (ductility/strength):

Solution Annealing

The standard heat treatment process for AISI 201, used to eliminate work hardening and restore ductility:

• Heat the steel to 1010-1120℃ in a controlled atmosphere furnace

• Rapid cooling (air cooling/water cooling) to retain the austenitic structure

• Effect: Optimize corrosion resistance, eliminate internal stress, restore formability and weldability—suitable for cold processing and finished product preparation.

Aging Treatment

For scenarios requiring higher strength:

• Heat the steel to 850-930℃

• Furnace cooling/air cooling as required

• Effect: Improve the yield strength and hardness of the material with a slight reduction in ductility.

Applications

AISI 201 is a versatile austenitic stainless steel, widely used in indoor, dry and low-corrosion environments due to its excellent cost-performance, formability and weldability. Its application covers household, architecture, industry and daily use, with typical scenarios as follows:

Household Goods & Kitchen Utensils

• Compliant with general food contact safety requirements, suitable for dry/low-acid food contact scenarios:

• Cutlery: Knives, forks, spoons, dinner plates, food trays

• Kitchen utensils: Pots, pans, bowls, sinks, draining baskets, kitchen hardware

• Daily household: Insulated cups, water jugs, storage trays, metal basins

Architectural Decorations & Interiors

• Excellent formability and decorative finish, the first choice for indoor decoration with high cost-performance:

• Building trim: Door/window frames, handrails, stair guardrails, balustrades

• Interior decoration: Elevator decorative panels, curtain wall accents, skirting boards, ceiling strips

• Commercial space: Shopping mall decorative frames, hotel interior trim

Industry & Manufacturing

• Suitable for light industrial parts and equipment with low corrosion requirements:

• Automotive parts: Exhaust pipe decorative covers, car interior trim, wheel hub trim

• Home appliance shells: Washing machine, refrigerator, microwave oven, air conditioner outer frames

• Hardware accessories: Screws, nuts, springs, metal brackets, fasteners

Other Daily & Commercial Use

• Outdoor dry environment: Billboards, metal signage, street lamp brackets

• Retail & logistics: Supermarket shopping carts, display shelves, warehouse storage racks

• Light industry: Lighting brackets, decorative tubing, metal furniture frames

AISI 201 vs 304 vs 316 - Detailed Comparison

As the most commonly compared austenitic stainless steel grades, AISI 201, 304 and 316 have significant differences in composition, performance and cost due to different alloy designs. The following comparison helps to select the most suitable material according to application scenarios:

Scenario-Based Material Selection Guide

• Choose AISI 201: Pursue cost control, apply to indoor dry environment (e.g., cabinet panels, indoor handrails, dry food trays), can save 20-35% material cost compared with 304.

• Choose AISI 304: Need food grade certification, humid indoor environment (e.g., kitchen sinks, food containers, bathroom accessories), the mainstream choice for daily life and food processing.

• Choose AISI 316: Apply to coastal/marine, chemical plant, medical field (e.g., seawater equipment, chemical pipelines, surgical instruments), molybdenum element provides strong chloride corrosion resistance.

FAQ

Q1: Is AISI 201 suitable for outdoor use?

A1: It can only be used in dry inland outdoor environments (low humidity, no salt spray/acid rain). In coastal, high-humidity or industrial pollution areas, it will corrode faster—AISI 304/316 is recommended for such scenarios.

Q2: Is AISI 201 food-grade stainless steel?

A2: AISI 201 meets the requirements of general food contact safety and is suitable for short-term contact with dry/low-acid food. It is not recommended for long-term contact with acidic/salty food (e.g., tomato sauce, pickles) or high-temperature food—AISI 304 is the standard food-grade material.

Q3: How to maintain AISI 201 to prevent rust?

A3: Wipe the surface regularly to remove dust and contaminants, avoid long-term water accumulation.

Clean kitchenware with neutral detergent and dry it in time, avoid contact with strong acid/alkali cleaners.

If the passivation film is scratched, polish it with stainless steel polishing agent to restore the protective layer.

Q4: Can AISI 201 be welded with other stainless steel grades?

A4: Yes. It can be welded with AISI 304 using standard austenitic stainless steel welding materials (e.g., ER308L). Note that the corrosion resistance of the weld joint is slightly reduced, so it is not suitable for corrosive environments.

Q5: What is the difference between AISI 201 and 304 stainless steel?

A5: AISI 201 contains lower nickel (3.5–5.5% vs. 8–10.5% in 304) and higher manganese, which reduces material cost. It provides comparable formability and weldability but slightly lower corrosion resistance, making it suitable for indoor or dry-environment applications. For highly corrosive or outdoor coastal environments, 304 or 316 is recommended.