304N stainless steel seamless steel pipe

304N stainless steel
Name: Austenitic stainless steel
Standard: AISI, ASTM
Model: 304N
UNS Number: S30451
A, 304N Characteristics and Application:
304N is a nitrogen-containing stainless steel, is a stainless steel seamless steel pipe, standard: GB 0Cr19Ni19N, adding nitrogen is to increase the strength of steel, with a high content of nickel, and the hardening rate is low, 304N stainless steel is suitable for those with low requirements of cold forming.

B, 304N chemical composition①:
C: ≤0.08
Mn: ≤2.00
Si: ≤0.75
Cr: 18.0 ~ 20.0
Ni②: 8.0 ~ 10.5
P: ≤0.045
S: ≤0.03
N: 0.10 ~ 0.16
Note: ①single value except stated, all are the highest value; ②for some pipe technology, and the nickel content of some types of austenitic stainless steel must be slightly higher than the values shown in the table.
C, mechanical properties:
Tensile strength σb (MPa): ≥550
Conditions yield strength σ0.2 (MPa): ≥275
Elongation δ5 (%): ≥35
Section shrinkage ψ (%): ≥50
Hardness: ≤ 217HB; ≤95HRB; ≤220HV
1: heat treatment and microstructure specifications:
Heat Specifications: 1010 ~ 1150 ℃ rapid cooling.
Microstructure: Organizing for the austenitic type.
2: Delivery status:
Generally heat treatment delivery, the treatment types specified in the contract; not indicated, by not heat treatment delivery.