1.2327 86CrMoV7 open-die forgings

1.2327 at a glance

Material number

1.2327

DIN designation

86CrMoV7

Standards

DIN 17350, EN ISO 4957

Steel type

Low-alloyed cold work tool steel

As quenched

64 to 67 HRC

Soft annealed

230 HB max.

Hot forming

1150 to 850 °C

Main use

Cold mill rolls, straightening rolls

Forged forms

Bars, hollow bars, rings, discs, rolls

Manufacturer

Jiangyin Jiangnan Metal Co., Ltd.

What is 1.2327 steel?

1.2327 is the material number. 86CrMoV7 is the name for the same steel in DIN 17350 and EN ISO 4957.

Buyers use both, and a drawing calling for one is satisfied by the other. The chemistry does three jobs. Carbon at roughly 0.87% sets the hardness the steel can reach. Chromium at roughly 1.75% pushes hardenability deep enough to be useful in a large forged section. Molybdenum and vanadium refine the grain and slow the loss of hardness during tempering.

What separates 1.2327 from the higher-alloy cold work grades is crack sensitivity, which is low. In a heavy section that matters more than peak hardness. Forged cold rolling rolls with barrel diameters in the hundreds of millimetres are the classic application, and the grade earned its place there rather than in general die work.

We supply 1.2327 as forged product only. There is no plate or strip stock in this grade here. Each piece is open-die forged and heat treated to the condition stated on the order.

Chemical composition of 1.2327

Typical analysis is 0.87% C, 0.30% Si, 0.38% Mn, 1.75% Cr, 0.28% Mo, 0.13% Ni and 0.10% V, balance iron.

Roll work usually calls for tighter sulphur and phosphorus than the standard requires. ESR refined material can be sourced when a specification asks for it. Put the limits on the enquiry and they go into the certificate.

1.2327 equivalent grades

The closest equivalents to 1.2327 are NC7V and NC7VL in Poland, 9Ch2MF in GOST countries, and 9Cr2MoV in China.

These grades are close rather than identical. Before substituting one on a roll drawing, compare the actual ladle analysis against the hardened depth the design needs. Send us the specification and we will review it against 1.2327 before quoting.

Physical properties

At ambient temperature 1.2327 has a density of 7.85 g/cm³, a modulus of elasticity of 210 GPa and a thermal conductivity of 35.0 W/m·K.

Heat treatment of 1.2327

1.2327 is soft annealed at 720 to 750 °C, stress relieved near 650 °C, hardened from 800 to 850 °C in water or oil to 64 to 67 HRC, then tempered between 200 and 600 °C.

1. Soft annealing Heat to 720 to 750 °C and cool slowly in the furnace. Maximum resulting hardness is 230 HB. Forgings normally ship in this condition for further machining.
2. Stress relieving After rough machining, heat to approximately 650 °C, hold 1 to 2 hours at temperature, then air cool. The step reduces distortion during hardening and should not be skipped on long or thin-walled parts.
3. Hardening Austenitise at 800 to 820 °C, or 830 to 850 °C for heavier sections, followed by water or oil quenching. Hardness straight after quenching is 64 to 67 HRC.
4. Tempering Temper between 200 and 600 °C, chosen from the working hardness required. Rolls are usually tempered low to keep hardness. Higher tempering suits parts where toughness matters more than surface hardness.

Tempering temperature versus hardness

We deliver 1.2327 forgings soft annealed, normalised and tempered, or quenched and tempered to a specified hardness band, with the furnace record attached to the certificate.

Forging 1.2327

Hot forming runs from 1150 °C down to 850 °C. Forging stops before the steel falls below 850 °C.

High carbon makes this grade intolerant of a cold finish and of fast cooling straight off the press. Forgings go into a slow cool and then soft annealing. That is a good reason to buy the part already forged rather than buy stock and forge it locally.

Production route

1. Material Ingot or bloom in verified 1.2327 analysis, ESR refined where the specification requires it.
2. Open-die forging Upsetting and drawing under a hydraulic press with a manipulator.
3. Ring rolling Seamless rolled rings produced on a radial-axial ring mill for sleeve, bush and cylinder geometries.
4. Heat treatment Soft annealing, normalising and tempering, or quenching and tempering in temperature-recorded furnaces.
5. Rough machining Turning, boring and milling to the machining allowance agreed on the drawing.
6. Inspection and release Chemical analysis, hardness survey, ultrasonic testing and dimensional report, issued as an EN 10204 3.1 certificate.

1.2327 forged product forms

We supply 1.2327 as forged bars, hollow bars and sleeves, seamless rolled rings, discs and blocks, shafts, and cold mill roll blanks.

Send dimensions with the enquiry and we will confirm what is within our forging envelope. Prototypes and single pieces are quoted alongside series orders.

Applications for 1.2327 forgings

1.2327 is used above all for rolls: cold mill work rolls, back-up rolls, intermediate rolls, straightening and leveller rolls, and rolls for non-ferrous mills.

• Work and back-up rolls for reversing 2-high and 4-high cold rolling mills.
• Second intermediate rolls for 20-high cluster mills.
• Straightening and leveller rolls, including work and intermediate rolls for heavy-duty levelling.
• Cold plate leveller work and back-up rolls, and tension leveller rolls.
• Scale breaker rolls and roller-straightening rolls.
• Rolls for non-ferrous 2-high and 4-high rolling mills.
• Roll shafts, journals and roller bodies forged in one piece with the barrel.

Quality control and documentation

Every 1.2327 order ships with an EN 10204 3.1 mill test certificate.

• Ladle and product chemical analysis by optical emission spectrometer.
• Hardness survey in the delivery condition, HB or HRC as specified.
• Ultrasonic testing to EN 10228-3 or ASTM A388, acceptance class stated on the order.
• Tensile, impact and hardness testing where the specification calls for it.
• Dimensional report against the customer drawing.
• Third-party inspection by SGS, BV or TUV arranged on request.

Buying 1.2327 from Jiangyin Jiangnan Metal

The plant sits in Jiangyin, on the south bank of the Yangtze in Jiangsu, inside a long-established forging cluster.

Forging is what we do. Bars, hollow bars, rolled rings, discs and roll blanks come off our own presses rather than out of a stockholder's rack, and work is made to drawing in the geometry, allowance and heat-treated condition you specify.

Mixed-grade projects can ship from one place. Alongside 1.2327 we forge 42CrMo4, 34CrNiMo6, 18CrNiMo7-6, 17-4PH, Inconel 718 and Incoloy 825. Single prototype pieces are quoted on the same terms as series work, and traceability runs from ladle analysis through the heat treatment record to the final ultrasonic result.

Frequently asked questions about 1.2327

Related grades we forge

A short selection. Browse every grade in alloy steel, tool steel, stainless steel and nickel alloy.

• 42CrMo4
• AISI 4140
• 1.7225
• 34CrNiMo6
• AISI 4340
• 18CrNiMo7-6
• 17CrNiMo6
• AISI 8620
• 30NiCrMo8
• 17-4PH
• 15-5PH
• Inconel 718
• Inconel 625
• Incoloy 825