Austenitic

304L Ultra-Low Carbon Austenitic Stainless Steel

Chemical composition and mechanical properties per ASTM A240; available specifications are standard ranges, subject to the contract and technical agreement.

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18.0–20.0%Cr · Primary corrosion-resistance element

8.0–12.0%Ni · Austenite stabilizer

≥ 170MPaYield Strength Rp0.2

≤ 201HBWHardness Limit

Chemical Composition

ASTM A240 · Mass Fraction %

Main Alloying Element Content (Scale 0–25%)

18.0–20.0 Primary corrosion-resistance element

8.0–12.0 Austenite stabilization / toughness

≤2.00 Nickel substitute / strength

Element	Range
C	≤0.03
Si	≤0.75
Mn	≤2.00
P	≤0.045
S	≤0.030
Cr	18.0–20.0
Ni	8.0–12.0

Mechanical Properties

ASTM A240

Tensile Strength Rm≥ 485MPa
Yield Strength Rp0.2≥ 170MPa
Elongation A≥ 40%
Hardness≤ 201HBW

Equivalent Standards

Cross-Reference

ASTM A240USA · ASTM
EN 10088-2EU · CEN
JIS G4304/4305Japan · JIS
GB/T 3280China · National Standard

Available Specifications

Standard Ranges

Thickness0.3–60 mm
Width≤ 2000 mm
FormCoil / Plate / Heavy Plate / Circle / Slit Strip
Surface2B · BA · No.1 · No.4 · HL · 8K

Typical Applications

Common Industries

Thick-wall welded componentsLarge storage tanksChemical processing equipmentPipingApplications requiring no post-weld heat treatment

Substitution & Selection Guide

Compared with 304Slightly lower strength, better intergranular corrosion resistance after welding✓. If post-weld solution annealing is required ⇒ 304 is sufficient

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Note: The above chemical composition and mechanical properties are cited from the publicly available ASTM A240 standard; available specifications are standard ranges, subject to the contract and technical agreement.