1.7707, 30CrMoV9, 1.8519, 31CrMoV9

Structural boiler steel for nitriding 30CrMoV9, 1.7707, 31CrMoV9, 1.8519 acc. to TLV 813802001, DIN 1652-4, DIN 17200, DIN 17204, DIN EN 10250-3

1.7707, 30CrMoV9, 1.8519, 31CrMoV9

What is 1.7707, 30CrMoV9 grade steel?

1.7707, 30CrMoV9 steel is low-alloyed, used in the energy industry for the parts working in high temperatures below 540°C. used in the manufacture of screws, nuts, parts of turbines and other equipment for the energy industry

See more materials in Fasteners, including X40MnCrN19, 40CrMoV4-6, 30CrMoV9 and Inconel 718.

Chemical Composition

GradeChemical composition WT %
CSiMnPSCrMoV
1.7707, 30CrMoV90.26-0.34
0.15-0.400.40-0.70max 0.035
max 0.0352.30-2.70
0.15-0.250.10-0.20
1.8519, 31CrMoV90.27-0.34
max 0.40
0.40-0.70max 0.025max 0.0352.30-2.700.15-0.250.10-0.20

Mechanical Properties

1.7707, 30CrMoV9 +QT Mechanical properties - TLV 813802001

  • Dia.40mm to 100mm
    • Tensile strength Rm MPa: Min 1080-1270
    • Yield Strength Rp MPa: Min 880
    • Elongtion after fracture (l=5d)A %: min 10
    • Necking: min 40 %
    • Absorbed energy: min 41 J
  • Dia.100mm to 600mm
    • Tensile strength Rm MPa: Min 980-1180
    • Yield Strength Rp MPa: Min 780
    • Elongtion after fracture (l=5d)A %: min 11
    • Necking: min 45 %
    • Absorbed energy: min 48 J

1.8519, 31CrMoV9 QT Mechanical properties

  • Condition +A(Annealed)
    • Hardness, HB: max 248
  • Condition +QT
    • Tensile strength, Rm: 850 - 1300 MPa
    • The yield point, Re: min 650 MPa
    • Elongation, A: min 9%
    • Impact resistance, KV: min 25J

Physical Properties

Modulus of elasticity [103 x N/mm2]: 210

Density [g/cm3]: 7.85

Heat Treatment

Soft Annealing

Heat to 680-720oC, cool slowly. This will produce a maximum Brinell hardness of 248.

Hardening

Harden from a temperature of 850-880oC followed by oil quenching.

Tempering

Tempering temperature: 570-680oC.

Nitriding

Gas/plasma nitriding temperature (gas, salt bath): 570-580oC

Gas/plasma nitriding temperature (powder, plasma): 580oC

Surface hardness after nitriding: 800 HV

Welding

not suitable for welding

What is 1.7707, 30CrMoV9 equivalent to?

30CrMoV9, 31CrMoV9, 31CrMoV9, 30CrMoV9, 1.7707, 1.8519, 30Ch3MF, 30H2MF, 30Kh3MF, 30Х3МФ, 4340

Frequently Asked Questions about 1.7707, 30CrMoV9

Common questions about 1.7707, 30CrMoV9 steel grade, properties, equivalents, and ordering from Longhai Steel.

What is 1.7707, 30CrMoV9 grade steel?
1.7707, 30CrMoV9 is a special steel grade supplied by Longhai Steel: Structural boiler steel for nitriding 30CrMoV9, 1.7707, 31CrMoV9, 1.8519 acc. to TLV 813802001, DIN 1652-4, DIN 17200, DIN 17204, DIN EN 10250-3
What is the chemical composition of 1.7707, 30CrMoV9?
The chemical composition of 1.7707, 30CrMoV9 is listed on this datasheet page and in the downloadable PDF.
What is 1.7707, 30CrMoV9 equivalent to?
Equivalent and similar grades for 1.7707, 30CrMoV9 are listed in the Similar or equivalents steel grade section on this page.
How can I get a quote for 1.7707, 30CrMoV9?
Email sales@longhaisteel.com with size, quantity, and delivery requirements.