X20Cr13

Material

X20Cr13, 1.4021, S42020, 2Cr13, SUS420JI

Overview

X20Cr13 is martensitic stainless steel, mainly used for machining, than normal stainless steel has better cost performance, so in the case of corrosion resistance is not high requirements, has been more widely used. This steel can get better mechanical properties after quenching treatment, with good machinability, magnetic, good hardness, welding need to preheat.

Characteristics

X20Cr13 has high hardness and good corrosion resistance under quenching condition.
This steel is a commonly used stainless steel, with high thermal strength, oxidation resistance and good shock absorption. Good corrosion resistance in weakly corrosive media, and adequate corrosion resistance to fresh water, sea water, steam and air. Higher properties can be obtained after heat treatment.

Application

X20Cr13 stainless steel has the characteristics of high hardness and good corrosion resistance in the quenching state. It is commonly used in the manufacture of machine parts operating below 450°C and containers for the chemical and food industries used at room temperature.

Chemical composition

X20Cr13 as per EN 10088-3 (wt%)

C Si Mn P S Cr
0.16~0.25 ≤1.00 ≤1.00 ≤0.040 ≤0.030 12.0~14.0
Ni Mo Cu Sn Al N
≤0.60 ≤0.50 ≤0.50 ≤0.05 ≤0.05 ≤0.080

Mechanical property (in annealed condition)

The mechanical properties of different tempering temperatures as shown in table below

Tempering ℃ 300 400 500 600 700 800
Rm MPa 1580 1550 1460 1150 780 800
Rp MPa 1430 1390 1250 900 580 600
Z% 10 11 15 22 27 26
A% 5 5.5 7.5 14 19 16

Heat treatment and hardness

Soft annealing temperature: 745 ~ 825°C, air cooling, hardness max. 230 HBW.

Micro structure

The metallographic structure is characterized by martensitic type.

Machinability

The deep drawing and cold blanking process of X20Cr13 in cold state is good, and the stress relief annealing can be tempered at 730~780℃ and air cooling. The hardening tendency of X20Cr13 steel after welding is large and it is easy to crack.

Available Process

  • ◎ Hot worked
  • ◎ Cold worked
  • ◎ Cold worked and bright annealed
  • ◎ Cold worked, annealed and pickled
  • ◎ Cold worked, polished (MP, EP etc.)
  • ◎ Cold worked, bright annealed, polished (MP, EP etc.)

Common Tests

  • ◎ Chemical composition
  • ◎ Tension
  • ◎ Hardness
  • ◎ Micro structure
  • ◎ Eddy current
  • ◎ Surface condition
  • ◎ Shape and dimension
  • ◎ Positive Material Identification

Precision seamless tube

  • ◎ OD 16.0 ~ 168 mm
  • ◎ WT 1.50 ~ 32.5 mm

Service

  • ◎ Precision cutting
  • ◎ Tube surface treatment, like ID surface super mirror polishing, best level could reach Ra0.0015um
  • ◎ Tube deep processing, like coiling, bending, end forming, body forming, laser processing, various needles processing, built to drawing and sample, etc.