C&N industrial Group, pipe, fitting and flanges manufacturers,fbe epoxy and pe coating for pipeline since 1991,with brand C&N huitong ,C&N hongcheng.
When clients approach C&N for XC38 material projects, our engineering team has prepared this technical brief to demystify this European structural steel.
In short, the material is a European creation for structural use, it machines like 1045 or other alloy steels. “Alloy structural steels are widely used in the field of ship, vehicle, aircraft, guided missile, weapon, railway, bridge, pressure vessel, machine tool, mechanical components with larger section size and so on.
Technical Specification / Datasheet – NF XC38
MATERIAL STANDARDS: NF A37-502
MATERIAL CATEGORY: Cold rolling steel strip
CHEMICAL COMPOSITION (WEIGHT %)
| C (％): | 0.35~0.40 |
| Si (％): | 0.10~0.35 |
| Mn (％): | 0.50~0.80 |
| P (％)≤: | 0.035 |
| S (％)≤: | 0.025 |
| Other(％): | – |
Mechanical Properties
| Tensile strength / σb/MPa|≥: | 650~800 |
| Yield strength / σs/MPa|≥: | 450 |
| Elongation / 5(％)|≥: | 16 |
| AKV ( DVM-V ) ≥/J: | 35 |
Product Description
│ Standard │ XC38 (AFNOR NFA) │
│ Equivalent Grades │ C35E (1.1181)/AISI 1035 │
│ Tensile Strength │ ≥630MPa │
│ Yield Ratio │ ≈0.85 │
│ Machinability │ Comparable to 1045 │
Alloy structural steel is provided with higher yield strength, tensile strength, endurance strength, yield ratio (about 0.85 generally) enough plasticity and toughness.
The concentration of alloying element of this kind of steel is quite high, mainly are corrosion resistant steel, heat resistant steel, wear resistant steel and other special steels of physical and chemical properties. Alloy structural steel has preferable mechanical property than that of carbon structural steel, high performance of heat treatment especially.
Standard Processing Flow:
- EAF/VD/LF → ESR refining
- Ultrasonic testing (customizable levels)
- Bright annealing
- Final QT heat treatment
The alloy is usually produced by EAF /VD /LF followed by electroslag refining (ESR) if necessary for special purpose. Bars and, where applicable, forgings are subjected to ultrasonic examination based on the different level according to the buyer’s requirements. Bars are usually supplied in bright annealed condition or special bright annealed. Final Heat Treatment – Heat Treatment/QT
AVAILABLE SHAPES
Round bar, Flat bar, Square bar/tube, steel strip, sheet
Bright – peeled + polishing, centerless grinding
Forged – ring, discs, shaft
Key Applications
- Transportation: Marine shafts, vehicle hubs
- Energy Systems: Turbine fasteners, boiler supports
- Industrial Machinery: Gear shafts, multi-stage shafts
- Pressure Vessels: Seamless pipes, flanges
European equivalent for non-alloy quality special steel XC38 (AFNOR NFA ): C35E (1.1181)
While XC38 and 1035 share similar compositions, differences in Cr/Ni/Mo content (XC38: Cr≤0.4%,Ni≤0.4%,Mo≤0.1%) may affect mechanical properties. Consult C&N engineers before material substitution for critical components.
Carbon steels contain carbon as the main alloying element. They also contain up to 0.4% silicon and 1.2% manganese. There are also residual elements such as copper, molybdenum, aluminum, chromium, and nickel.
AISI 1038 carbon steel is a medium high carbon steel with good weldability and machinability. This steel can be strengthened by heat treatment after forming.
The following sections will explain about AISI 1038 carbon steel.
CHEMICAL COMPOSITION
The chemical composition of AISI 1038 carbon steel is outlined in the following table.
Element Content (%) Iron, Fe 98.59-99.09 Manganese, Mn 0.60-0.90 Carbon, C 0.340-0.420 Sulfur, S ≤ 0.050 Phosphorous, P ≤ 0.040 PHYSICAL PROPERTIES
The physical properties of AISI 1038 carbon steel are tabulated below.
Properties Metric Imperial Density 7.845 g/cm³ 0.2834 lb/in³ MECHANICAL PROPERTIES
The following table shows mechanical properties of cold drawn AISI 1038 carbon steel.
Properties Metric Imperial Tensile strength, ultimate 570 MPa 82700 psi Tensile strength, yield 485 MPa 70300 psi Modulus of elasticity 190-210 GPa 29700-30458 ksi Bulk modulus (typical for steel) 140 GPa 20300 ksi Shear modulus (typical for steel) 80.0 GPa 11600 ksi Poissons ratio 0.27-0.30 0.27-0.30 Elongation at break (in 50 mm) 12% 12% Reduction of area 35% 35% Hardness, Brinell 163 163 Hardness, Knoop (converted from Brinell hardness) 184 184 Hardness, Rockwell B (converted from Brinell hardness) 84 84 Hardness, Vickers (converted from Brinell hardness) 170 170 Machinability (based on AISI 1212 steel. as 100 machinability) 65 65 THERMAL PROPERTIES
The thermal properties of AISI 1038 carbon steel are given in the following table.
Thermal Properties Metric Imperial Thermal conductivity 51.9 W/mK 360 BTU in/hr.ft².°F
This technical document is provided by C&N. Contact our engineering team for customized alloy steel solutions!
