(30Cr13) 3Cr13 Stainless Steel Equivalent, Chemical Composition, Properties

stainless steel kitchen knife made from 3Cr13 steel
3Cr13 Stainless Steel Kitchen Knife

30Cr13 = 3Cr13 stainless steel grade representation:

  • 30 (or 3) – Average carbon content: 30/10000 (0.3%), old representation: 3/1000
  • Cr – Chromium
  • 13 – Average chromium content: 13%

Chinese 30Cr13 or 3Cr13 steel is a martensitic stainless steel, this steel has good mechanical processing performance. After heat treatment (quenching and tempering), it has excellent corrosion resistance and high polishing strength and wear resistance. After quenching and tempering treatment, when hardness is below HRC30, 3Cr13 material has good processability and easy to achieve good surface quality, and when the hardness is greater than HRC30, the surface quality is good, but the tool is easy to wear.

Compared with 1Cr13 (12Cr13) and 2Cr13 steel, 3Cr13 stainless steel has higher strength, hardness and higher hardenability. It has certain corrosion resistance in dilute nitric acid and weak organic acid at room temperature, but not as good as 1Cr13 and 2Cr13.

(30Cr13) 3Cr13 Stainless Steel Chemical Composition

Chemical Composition %
Steel GradeCSi (≤)Mn (≤)P (≤)S (≤)CrNi (≤)
0.26 – 0.351.001.000.0400.03012.00 – 14.000.60

Mechanical Properties

  • Tensile strength: ≥735 N/mm2
  • Conditional yield strength: ≥540 N/mm2
  • Elongation: ≥12%
  • Rate of reduction in area: ≥40%
  • Impact energy: ≥24 J
  • Hardness: ≤ 235HB (After annealing); > 217 (After quenching and tempering)

(30Cr13) 3Cr13 Steel Equivalent

30Cr13 or 3Cr13 stainless steel equivalent to US ASTM, Germany DIN, Japanese JIS, France NF, UK BS, and ISO standard.

GB/T 12203Cr13JISSUS 420J2ISO 683-13,
ISO 683-16


3Cr13 steel is mainly used for high-strength parts, as well as wear parts under high stress load and certain corrosive medium, such as tools and springs working below 300 °C; shafts, bolts, nozzles, valves, valve seats and bearings working below 400 °C.

You may be also interested in 3Cr13 vs 2Cr13 Steel.


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