G-X5CrNi13-4 is a low carbon 13% chromium, 4% nickel martensitic stainless steel with added molybdenum. It is strong and tough, resists corrosion well, and keeps good impact values at low temperature. For forgings, the grade is usually ordered as EN 1.4313 (X3CrNiMo13-4), ASTM A182 F6NM / UNS S41500 or AFNOR Z6CN13-04. The cast version is GX4CrNi13-4 (1.4317) or CA6NM.
Jiangyin Jiangnan Metal Co., Ltd. forges this grade at our open-die forging plant in Jiangyin, Jiangsu Province. We make forged bars, hollow bars, sleeves, seamless rolled rings, discs, flanges, and parts for valves, pumps and hydro turbines.
Equivalent Grades
| Standard | Designation | Product Form |
|---|---|---|
| DIN (old) | G-X5CrNi13-4 | Cast / general |
| EN 10250-4 / EN 10088 | 1.4313, X3CrNiMo13-4 | Forgings, wrought |
| ASTM A182 | F6NM, UNS S41500 | Forged flanges, fittings, valves |
| AFNOR | Z6CN13-04, Z4CN13-4 | Wrought / cast |
| BS | 425C11 | - |
| EN 10283 / EN 10213 | 1.4317, GX4CrNi13-4 | Castings |
| ASTM A743 / A487 | CA6NM, UNS J91540 | Castings |
| JIS | SCS5 | Castings |
| GB | 04Cr13Ni5Mo | - |
Chemical Composition (%)
| Grade | C | Si | Mn | P | S | Cr | Ni | Mo | N |
|---|---|---|---|---|---|---|---|---|---|
| G-X5CrNi13-4 | ≤0.05 | ≤0.60 | ≤1.00 | ≤0.035 | ≤0.020 | 12.0-14.0 | 3.5-4.5 | 0.40-0.70 | ≥0.02 |
| ASTM F6NM / S41500 | ≤0.05 | ≤0.60 | 0.50-1.00 | ≤0.030 | ≤0.030 | 11.5-14.0 | 3.5-5.5 | 0.50-1.00 | - |
| Z6CN13-04 | ≤0.06 | ≤0.75 | ≤1.00 | ≤0.040 | ≤0.015 | 12.0-13.5 | 3.5-4.5 | 0.30-0.50 | - |
| CA6NM (cast) | ≤0.06 | ≤1.00 | ≤1.00 | ≤0.040 | ≤0.030 | 11.5-14.0 | 3.5-4.5 | 0.40-1.00 | - |
We produce to the standard or drawing on your order. Dual certified material, for example 1.4313 + F6NM, is available on request.
Mechanical Properties
| Condition | Tensile Rm (MPa) | Yield Rp0.2 (MPa) | Elongation A (%) | Impact KV (J) | Hardness |
|---|---|---|---|---|---|
| 1.4313 +QT650 | 700-850 | ≥520 | ≥15 | ≥70 | - |
| 1.4313 +QT780 | 780-980 | ≥620 | ≥15 | ≥70 | - |
| 1.4313 +QT900 | 900-1100 | ≥800 | ≥12 | ≥50 | - |
| ASTM A182 F6NM | ≥795 | ≥620 | ≥15 | - | ≤295 HB |
| NACE MR0175 | ≥655 | ≥517 | ≥18 | - | ≤23 HRC |
Values are at room temperature. Results depend on section size and heat treatment and are confirmed at order stage.
Forging and Heat Treatment
We forge at about 1150 °C and air cool afterwards. Hardening is done at 950-1050 °C with oil or air cooling. The tempering temperature sets the strength class: 520-580 °C for QT900, 550-600 °C for QT780, and a double temper (650-700 °C, then 600-620 °C) for QT650. The steel is used in service up to about 300 °C.
Forged Products
Forged Bars
Round, square, flat, rectangular and hex bars.
Hollow Bars and Sleeves
Bushings, cylinders, barrels, shells, hubs and housings.
Seamless Rolled Rings
Rolled rings and valve seat rings.
Discs, Blocks and Flanges
Forged discs, plates, blocks and flanges.
Valve Parts
Valve bodies, bonnets, stems and seats.
Pump and Turbine Parts
Pump and compressor parts, hydro turbine parts.
Applications
Common uses are hydro turbine runners, guide vanes and shafts, pumps and compressors, valves for oil, gas and chemical plants, power generation equipment, and dies for pressure die casting.
FAQ
What is the difference between G-X5CrNi13-4, 1.4313 and 1.4317?
All three are 13Cr-4Ni martensitic stainless steels. G-X5CrNi13-4 is the old DIN name. Under current EN standards, 1.4313 (X3CrNiMo13-4) is the wrought grade used for forgings, and 1.4317 (GX4CrNi13-4) is the casting grade.
Is F6NM the same as Z6CN13-04?
They are close equivalents, but the composition limits are slightly different. Z6CN13-04 allows 0.30-0.50% Mo, while F6NM allows 0.50-1.00%.
Do you supply F6NM forgings?
Yes. Jiangyin Jiangnan Metal Co., Ltd. forges G-X5CrNi13-4 / 1.4313 / F6NM bars, rings, discs, sleeves, flanges and custom parts at our plant in Jiangyin, Jiangsu Province, China.
How do I get a quotation?
Send your drawing or sizes, quantity, standard and delivery condition to sales@steelforgepieces.com, or call +86-189-2135-9659.
Request a Quote
Jiangyin Jiangnan Metal Co., Ltd. | Open-Die Forging Factory
Address: No.1 Chengxiqiao Road, Zhouzhuang Town, Jiangyin City, Jiangsu Province, China
Tel: 0086-189-2135-9659 | Email: sales@steelforgepieces.com