Chemical Composition Element Specified / Typical Range (wt. %) C ≤0.07 / ≤0.030 Mn ≤2.00 Si ≤1.00 P ≤0.045 S ≤0.030 Cr 18.0–20.0 Ni 8.0–11.0 Mo — N ≤0.10 Fe Balance

Mechanical Properties Property Minimum / Requirement Tensile Strength, min. 515 MPa (304) / 485 MPa (304L) Yield Strength, 0.2%, min. 205 MPa (304) / 170 MPa (304L) Elongation, min. 30% Hardness As required by the applicable fitting specification

Chemical and petrochemical plants Oil and gas gathering and processing Process branch piping Water treatment and utility systems Food, pharmaceutical and sanitary piping Offshore and marine systems

Chemical Composition Element Specified / Typical Range (wt. %) C ≤0.07 / ≤0.030 Mn ≤2.00 Si ≤1.00 P ≤0.045 S ≤0.030 Cr 18.0–20.0 Ni 8.0–11.0 Mo — N ≤0.10 Fe Balance

Mechanical Properties Property Minimum / Requirement Tensile Strength, min. 515 MPa (304) / 485 MPa (304L) Yield Strength, 0.2%, min. 205 MPa (304) / 170 MPa (304L) Elongation, min. 30% Hardness As required by the applicable fitting specification

Chemical and petrochemical plants Oil and gas gathering and processing Process branch piping Water treatment and utility systems Food, pharmaceutical and sanitary piping Offshore and marine systems

304 / 304L Stainless Steel Tees

Grade: 304/304L

Types:

Equal Tee, Straight Tee, Reducing Tee, Seamless Tee, Welded Tee, Butt-Welding Tee.

Standards:

ASTM B16.9, EN10253-4, JIS B2312/2313

304 and 304L are widely used austenitic stainless steels for general-purpose piping fittings. They offer good corrosion resistance, excellent weldability and formability, and reliable performance in many industrial, food, water and process services. 304 is the standard general-purpose grade, while 304L has reduced carbon content and is particularly suitable for welded fittings where reduced sensitization is desired.

Chemical Composition

Element	Specified / Typical Range (wt. %)
C	≤0.07 / ≤0.030
Mn	≤2.00
Si	≤1.00
P	≤0.045
S	≤0.030
Cr	18.0–20.0
Ni	8.0–11.0
Mo	—
N	≤0.10
Fe	Balance

Mechanical Properties

Property	Minimum / Requirement
Tensile Strength, min.	515 MPa (304) / 485 MPa (304L)
Yield Strength, 0.2%, min.	205 MPa (304) / 170 MPa (304L)
Elongation, min.	30%
Hardness	As required by the applicable fitting specification

Chemical and petrochemical plants
Oil and gas gathering and processing
Process branch piping
Water treatment and utility systems
Food, pharmaceutical and sanitary piping
Offshore and marine systems

Introduction

Specification

Chemical Composition

Element	Specified / Typical Range (wt. %)
C	≤0.07 / ≤0.030
Mn	≤2.00
Si	≤1.00
P	≤0.045
S	≤0.030
Cr	18.0–20.0
Ni	8.0–11.0
Mo	—
N	≤0.10
Fe	Balance

Mechanical

Mechanical Properties

Property	Minimum / Requirement
Tensile Strength, min.	515 MPa (304) / 485 MPa (304L)
Yield Strength, 0.2%, min.	205 MPa (304) / 170 MPa (304L)
Elongation, min.	30%
Hardness	As required by the applicable fitting specification