EN 1.4318, ASTM TYPE 301LN / UNS S30153 Stainless Steel

EN 1.4318, ASTM TYPE 301LN / UNS S30153 Stainless Steel

EN 1.4318, ASTM TYPE 301LN / UNS S30153 Stainless Steel General Characteristics 301LN/4318 is a low-carbon, nitrogen alloyed alternative to 301/4310 with elevated strength, making it particularly suitable for lightweight construction. Temper rolled 301LN/4318 is used for applications that...
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EN 1.4318, ASTM TYPE 301LN / UNS S30153 Stainless Steel

General Characteristics

301LN/4318 is a low-carbon, nitrogen alloyed alternative to 301/4310 with elevated strength, making it particularly suitable for lightweight construction. Temper rolled 301LN/4318 is used for applications that require increased hardness and strength.


301LN/4318 is an austenitic CrNi stainless steel with high nitrogen and relatively low nickel content. Due to its high nitrogen content, 301LN/4318 has increased mechanical strength and shows a high degree of work hardening on mechanical deformation. As nitrogen-alloying improves corrosion properties, this product offers similar corrosion resistance to austenitic CrNi standard grades in many corrosive environments.


301LN/4318 is used in applications where corrosion resistance and a combination of high mechanical strength and good formability are needed. Due to its tendency to work hardening, 301LN/4318 can absorb an increased amount of energy during deformation. It can be delivered in the temper rolled condition with different strength levels.


Typical Applications

Automotive applications, especially vehicle chassis

Railroad cars


Product forms, available sizes and finishes

Flat

Product typeFinishesThicknessWidth

Black hot band

1U

3,00-8,00

1000-1550

Cold rolled coil

2B, 2BB, 2C, 2D, 2E, 2G, 2H, 2J, 2K, 2M, 2R

0,05-6,35

3-1530

Cold rolled sheet

2B, 2BB, 2D, 2E, 2G, 2H, 2J, 2M, 2R

0,40-6,35

35-1530

Hot rolled coil, pickled

1C, 1D, 1G, 1M, 1U

2,00-10,00

50-1550

Precision strip

2H, 2R

0,05-1,50

3-649


Chemical Composition

The typical chemical composition for this grade is given in the table below, together with composition limits given for the product according to different standards. The required standard will be fully met as specified on the order.


The chemical composition is given as % by mass.


CMnCrNiMoN
Typical

0.02


17.7

6.5


0.14

ASTM A240

≤0.03

≤2.00

16.0-18.0

6.0-8.0


0.07-0.20

ASTM A666

≤0.03

≤2.00

16.0-18.0

6.0-8.0


0.07-0.20

EN 10028-7

≤0.030

≤2.00

16.50-18.50

6.00-8.00


0.10-0.20

EN 10088-2

≤0.030

≤2.0

16.5-18.5

6.0-8.0


0.10-0.20

EN 10088-4

≤0.030

≤2.0

16.5-18.5

6.0-8.0


0.10-0.20

IS 6911

≤0.03

≤2.00

16.0-18.0

6.0-8.0

≤0.70

0.07-0.20


Mechanical Properties

The mechanical properties of the available products in soft annealed condition at room temperature are given in the table below. Moderate strengths can be reached at elevated temperatures (~550 °C / 1022 °F). Temperatures for excessive scaling are close to 850 °C/1562 °F. 


This product, along with other austenitic corrosion resistant stainless steels, exhibits very high ductility and high elongation to fracture. It is not susceptible to brittle fracture in the solution annealed condition.


StandardRp0.2Rp1.0RmElongationRockwellHB

MPa

MPa

MPa

%



Product type: Cold rolled coil and sheet

Typical (thickness 1 mm)

360

400

750

55



ASTM A240

≥ 240


≥ 550


≤ 100HRB

≤ 241

EN 10028-7

≥ 350

≥ 380

650-850

≥ 40



EN 10088-2

≥ 350

≥ 380

650-850

≥ 40



EN 10088-4

≥ 350

≥ 380

650-850

≥ 40



IS 6911

≥ 240


≥ 550


≤ 100HRB

≤ 241

Product type: Hot rolled coil and sheet

Typical (thickness 4 mm)

350

400

740

47


90

ASTM A240

≥ 240


≥ 550




EN 10028-7

≥ 350

≥ 380

650-850

≥ 40



EN 10088-2

≥ 350

≥ 380

650-850

≥ 40



EN 10088-4

≥ 350

≥ 380

650-850

≥ 40



IS 6911

≥ 240


≥ 550


≤ 100HRB

≤ 241

Product type: Hot rolled quarto plate

Typical (thickness 15 mm)

345

380

750

45



ASTM A240

≥ 240


≥ 550




EN 10028-7

≥ 330

≥ 370

650-850

≥ 40



EN 10088-2

≥ 330

≥ 370

630-830

≥ 40



EN 10088-4

≥ 330

≥ 370

630-830




IS 6911

≥ 240


≥ 550


≤ 100HRB

≤ 241


Physical Properties

The physical properties of the available products are given in the table below Austenitic crystal structure, non-magnetic as soft annealed. Becomes easily magnetic when deformed.


DensityModulus of elasticityThermal exp. at 100 °CThermal conductivity

kg/dm3

GPa

10-6/°C

W/m°C

7.9

200

16.0

15


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