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Boiler Steel

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September 2, 2021 at 09:30

BOILER STEEL 25CRMO4

BOILER STEEL 25CRMO4

    1. DIN 25CrMo4 / AISI 4130 Steel  ALLOY ENGINEERING STEEL AND HIGH PRESSURRE BOILER STEEL 25CRMO4, 1.7218, AISI 4130 WITH INCREASED STRENGTH FOR CONSTRUCTION AND OPERATION AT ELEVATED TEMPERATURES.

  1. DIN 25CrMo4 / AISI 4130 Steel Specification and Relevant Standards

Country USA DIN BS Japan
Standard ASTM A29 EN 10250/EN10083 BS 970 JIS G4105
Grades 4130 25CrMo4/1.7218 708A25/708M25 SCM430

  1. DIN 25CrMo4 / ASTM 4130 Steels And Equilvalents Chemical Composition

Standard Grade C Mn P S Si Cr Mo
ASTM A29 4130 0.28-0.33 0.40-0.60 0.035 0.040 0.15-0.35 0.80-1.10 0.15-0.25
EN10250
/EN10083		 25CrMo4/
1.7218		 0.22-0.29 0.60-0.90 0.025 0.035 ≦0.40 0.90-1.2 0.15-0.30
JIS G4105 SCM430/
SCM2		 0.28-0.33 0.60-0.85 0.030 0.030 0.15-0.35 0.90-1.2 0.15-0.30

4.DIN 25CrMo4 /AISI Alloy 4130 Steel Mechanical Properties

25CrMo4 /  4130 Physical Properties

  • Density (lb / cu. in.)                                                                        0.283
  • Specific Gravity                                                                              7.8
  • Specific Heat (Btu/lb/Deg F – [32-212 Deg F])                             0.114
  • Melting Point (Deg F)                                                                     2610
  • Thermal Conductivity                                                                     22.3
  • Mean Coeff Thermal Expansion                                                     7
  • Modulus of Elasticity Tension                                                        29

DIN 25CrMo4 /AISI 4130 Steel Mechanical Properties

Properties Metric
Tensile strength, ultimate 560 MPa
Tensile strength, yield 460 MPa
Modulus of elasticity 190-210 GPa
Bulk modulus (Typical for steel) 140 GPa
Shear modulus (Typical for steel) 80 GPa
Poissons ratio 0.27-0.30
Elongation at break (in 50 mm) 21.50%
Reduction of area 59.6
Hardness, Brinell 217
Hardness, Knoop (Converted from Brinell hardness) 240
Hardness, Rockwell B (Converted from Brinell hardness) 95
Hardness, Rockwell C (Converted from Brinell hardness, value below normal HRC range, for comparison purposes only.) 17
Hardness, Vickers (Converted from Brinell hardness) 228
Machinability (Annealed and cold drawn. Based on 100% machinability for AISI 1212 steel.) 70

Thermal Properties

Properties Metric
Thermal conductivity (100°C) 42.7 W/mK

5. DIN 25CrMo4 /AISI 4130 Steel Application

This low alloy 4130 steel is widely used in many applications, and some typical application areas are as follows:

https://otaialloysteel.com/3-steel-grades-suitable-for-making-gear/

  • Commercial aircraft, aircraft engine mounts
  • Military aircraft
  • Automotive
  • Machine tools
  • Hydraulic tools
  • Auto racing
  • Aerospace
  • Oil and gas industries – as forged valve bodies and pumps
  • Agricultural and defense industries etc.
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12Cr1MoV steel

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Boiler Steel

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January 5, 2021 at 17:34

12Cr1MoV boiler steel

12Cr1MoV boiler steel

12Cr1MoV, alloy structural steel&boiler steel. Compared with 12CrMoV steel, it has higher oxidation resistance and thermal strength. In addition, the tensile strength of the steel should be close to that of the steel before welding and after welding. At 580 ℃, it still has high thermal strength, oxidation resistance and high permanent plasticity. The production process is simple and the welding performance is good.

 

Equivalent Of 12Cr1MoV Steel:

GB DIN EN ISO
12Cr1MoV 17175 16Mo3 –

 

12Cr1MoV Mechanical properties:
Tensile strength (σ B / MPA): ≥ 490
Yield point (σ s / MPA): ≥ 245 elongation after fracture (δ 5 /%): ≤ 22
Reduction of area (ψ /%): ≥ 50
Impact absorption energy (aku2 / J): ≥ 71
Impact toughness value α kV (J / cm2): ≥ 88 (9)
Brinell hardness (hbs100 / 3000) (annealed or high temperature tempered): ≤ 179

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