40NiCrMo7 chemical composition
We supply 40NiCrMo7 as per EN 10083-1:1991 or the customer's own specification.
| Element | Min | Max |
|---|---|---|
| Carbon (C) | 0.37 | 0.44 |
| Silicon (Si) | 0.15 | 0.40 |
| Manganese (Mn) | 0.50 | 0.80 |
| Phosphorus (P) | - | 0.035 |
| Sulphur (S) | - | 0.035 |
| Chromium (Cr) | 0.60 | 0.90 |
| Molybdenum (Mo) | 0.20 | 0.30 |
| Nickel (Ni) | 1.60 | 1.90 |
Mechanical properties depend on the section size and heat treatment. We agree them with the customer for each order and show the test results on the certificate.
40NiCrMo7 forgings we make
We forge all parts as per the customer's drawing or sizes.
- Forged shafts and spindles
- Straight, step and eccentric shafts, also forged crankshafts.
- Forged and seamless rolled rings
- Rings for gears, bearings, slewing and flange blanks.
- Forged discs
- Solid discs and blanks for wheels, gears and valve parts.
- Forged flanges and tube sheets
- For pressure vessels and shell-and-tube heat exchangers.
- Forged round bars
- Solid bars for machining into shafts, pins and spindles.
- Gear blanks
- Forged blanks for gears and pinions in gearboxes.
- Hollow forgings
- Forged pipes, tubes, sleeves and bushings.
- Valve components
- Valve stems, seat rings, bodies and blocks for ball, gate, globe, check and plug valves.
How 40NiCrMo7 forgings are produced
- MeltingSteel is melted by electric arc furnace, refined in a ladle furnace and vacuum degassed (EAF + LF + VD).
- ForgingIngots or billets are open-die forged, or ring-rolled for seamless rings.
- Heat treatmentParts are annealed, normalized, or hardened and tempered, as the customer requires.
- Ultrasonic testingEvery forging is ultrasonically tested to EN 10228-3, SEP 1921, ASTM A388 or another agreed standard.
- CertificationAn EN 10204 3.1 inspection certificate is issued, or a 3.2 certificate with third-party inspection.
Where 40NiCrMo7 forgings are used
- Power transmission: gears, gear rings, pinions and gearbox shafts.
- Pumps and compressors: plunger pump and chemical pump shafts, gas and air compressor shafts.
- Oil and gas: wellhead and Christmas tree parts, subsea and deepwater production equipment.
- Power generation: turbine and generator shafts, rings and discs.
- Valves: stems, seat rings and bodies for industrial valves.
- Heavy machinery and shipbuilding: crankshafts, rolls, wheels and manifolds.
40NiCrMo7 equivalent grades
The closest comparable grades are French 40NCD7 and American AISI/SAE 4340. Chinese GB 40CrNiMoA is often used as a substitute, although its nickel range is lower. They are close in chemistry but not the same, so please check them against your specification before substituting.
40NiCrMo7 FAQ
What is 40NiCrMo7 steel?
40NiCrMo7 is a nickel-chromium-molybdenum alloy steel for quenching and tempering, listed in EN 10083-1:1991. It contains 0.37-0.44% carbon, 1.60-1.90% nickel, 0.60-0.90% chromium and 0.20-0.30% molybdenum. The nickel content gives deep hardenability and good toughness in heavy sections.
What is the equivalent of 40NiCrMo7?
The closest comparable grades are French 40NCD7 and American AISI/SAE 4340. Chinese GB 40CrNiMoA is often used as a substitute but has a lower nickel range. They are close in chemistry but not the same, so please check them against your specification before substituting.
Which 40NiCrMo7 forgings does Jiangyin Jiangnan Metal make?
Jiangyin Jiangnan Metal Co., Ltd. makes 40NiCrMo7 forged shafts, spindles, crankshafts, seamless rolled rings, forged discs, flanges, tube sheets, round bars, gear blanks, sleeves, bushings, hollow forgings and valve components to customer drawings.
What heat treatment is available for 40NiCrMo7 forgings?
40NiCrMo7 forgings can be supplied annealed, normalized, or hardened and tempered (quenched and tempered), depending on the customer's requirement.
How are 40NiCrMo7 forgings inspected and certified?
Jiangyin Jiangnan Metal ultrasonically tests 40NiCrMo7 forgings to EN 10228-3, SEP 1921 or ASTM A388 and supplies an EN 10204 3.1 inspection certificate, or an EN 10204 3.2 certificate with third-party inspection.
How do I get a quote for 40NiCrMo7 forgings?
Send the drawing or dimensions, quantity, heat-treatment condition and inspection requirements to sales@steelforgepieces.com, or call +86 189 2135 9659. Jiangyin Jiangnan Metal Co., Ltd. is located at No.1 Chengxiqiao Road, Zhouzhuang Town, Jiangyin City, Jiangsu Province 214423, China.
Related Ni-Cr-Mo alloy steels
About Jiangyin Jiangnan Metal
Jiangyin Jiangnan Metal Co., Ltd. is an open-die forging factory in Jiangyin City, Jiangsu Province 214423, China. We produce forged rings, seamless rolled rings, shafts, discs, flanges and bars in carbon steel, alloy steel, tool steel, stainless steel and nickel alloys, including 40NiCrMo7.
Jiangyin Jiangnan Metal Co., Ltd.No.1 Chengxiqiao Road, Zhouzhuang Town, Jiangyin City, Jiangsu Province 214423, China
Phone: +86 189 2135 9659
Email: sales@steelforgepieces.com