What Is Stainless Steel 1.4307

What Is Stainless Steel 1.4307

1.4307 is an ultra-low carbon austenitic stainless steel developed to solve the problem that the Cr23 and C6 precipitation materials of 304 material have a strong intergranular corrosion tendency under some conditions.

Its sensitized state is significantly better resistant to intergranular corrosion than 304, except for the slightly lower strength, the other properties are the same as 304.

It can be welded by a variety of general stainless steel welding processes, and heat treatment can be omitted after welding.


1.4307 corresponding brand:

1. Chinese standard GB-T standard: digital grade: S30403, new grade: 022Cr19Ni10, old grade: 00Cr19Ni10.
American Standard: ASTMA Standard: S30403, SAE Standard: 30304L, UNS Standard: 304L.
Japanese standard JIS standard: sus304L.
German standard DIN standard: "1.4306, 1.4307".
European standard EN standard: "X2CrNi18-9, X2CrNi19-11".
The standard NF standard: z2cn18-09.
British standard BS standard: 304S31, 304s12.
Swedish NTR standard: AISL.

Chemical composition of 1.4307:

(1) carbon C: ≤ 0.30, (2) silicon Si: ≤ 1.00, (3) manganese Mn: ≤ 2.00, (4) phosphorus P: ≤ 0.045, (5) sulfur S: ≤ 0.030, (6) chromium Cr: 18.00 to 20.00, (7) nickel Ni: 8.00 to 12.00 (8) Molybdenum Mo: -, (9) Nitrogen N: -, (10) Copper Cu: -, (11) Other elements: -.

Physical properties:

Density density (20 ° C) / kg / dm3: 7.9
Melting point / °C: -
Specific heat capacity (0~100°C)/kg/(kg.k): 0.5
Thermal conductivity / w / (m.k) 100 ° C -: 16.3
Thermal conductivity / w / (m.k) 500 ° C -: 21.5
Linear expansion coefficient / (10-6 / k) 0 ~ 100 ° C: 16.8
Linear expansion coefficient / (10-6 / k) 0 ~ 509 ° C: " 18.3
Resistivity (20 ° C) / (Ω.mm2 / m): ""
Longitudinal modulus of elasticity (20 ° C) / GPa:"
Magnetic: None.

Mechanical properties:

(1) Delivery status: "Bar processing and solid solution treatment,
Hot pressure processing is not solution treatment", sheet solid solution pickling
(2) Tensile strength (RM/MPa): 480
(3) Extension strength (Rp0.2/MPa): 177,
(4) Elongation A/%: 40,
(5) Area shrinkage rate (Z/%): 60.

Heat treatment:

  • 1 hardness HBW ≤: solid solution 187, hardness HRB ≤: 90,
  • 2 heating temperature: 1010 ~ 1150,
  • 3 heating method: fast cooling,
  • 4 other: cold-rolled plate solid solution 485, 201HBW 92HRB 210HV.

1.4307 Application fields:

It is mainly used in equipment, containers, pipelines and various parts that cannot be solution treated after welding in chemical, petrochemical, chemical fertilizer, petroleum, power and other industries.


Posted by stainless steel tubing supplier and stainless steel pipe supplier KAYSUNS.

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