When a customer asked Metalmite to quote a project using XC38 we did a quick Google search and could not find much information. So, we put together a quick cheat sheet here for you to find the data it took us a while to find. In short, the material is a European creation for structural use, it machines like 1045 or other alloy steels. We found that CCSteels.com said, “Alloy structural steels are widely used in the field of ship, vehicle, airplane, guided missile, weapons, railway, bridges, pressure vessel, machine tools, mechanical components with a bigger sectional size and so on.” The part we were quoting can be seen on the picture attached to this post. It is a hub for a vehicle. We can offer 5 and 6 axis machining to complete parts like this in record time. This part can be machined in 2 operations for around $90 in machine time. Please try out or all-new online quoting page, powered by paperlessparts.com that is quick and easy to get your pricing.
Technical data from: http://www.ccsteels.com/Structural_steel/2340.html
TECHNICAL SPECIFICATION / DATASHEET – NF XC38
MATERIAL STANDARDS: NF A37-502
MATERIAL CATEGORY: Cold rolling steel strip
CHEMICAL COMPOSITION (WEIGHT %)
|Tensile strength / σb/MPa|≥:||650~800|
|Yield strength / σs/MPa|≥:||450|
|Elongation / 5(％)|≥:||16|
|AKV ( DVM-V ) ≥/J:||35|
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 alloy 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.
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 buyers’ requirements.
Bars are usually supplied bright in the annealed condition, or bright annealing specially.
Final heat treatment – heat treatment / QT
Round bar, Flat bar, Square bar/tube, steel strip, sheet
Bright – peeled + polishing, centerless grinding
Forged – ring, discs, shaft
Alloy structural steels are widely used in the field of ship, vehicle, airplane, guided missile, weapons, railway, bridges, pressure vessel, machine tools, mechanical components with a bigger sectional size and so on.
- Power generation – turbine fasteners – boiler support rods
- Process plant – fasteners
- Mechanical gears, gear shaft, main axis, valve rod
- Mechanical parts – connecting rod, bolt and nut
- Multidiameter shaft
- Pressure vessel, seamless pipe
C35E (1.1181) 1035
European equivalent grade for Non-alloy quality special steel XC38 (AFNOR NFA ): C35E (1.1181)
Carbon steels contain carbon as the key alloying element. They also contain up to 0.4% silicon and 1.2% manganese. In addition, residual elements such as copper, molybdenum, aluminum, chromium and nickel are present.
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 more about AISI 1038 carbon steel.
The chemical composition of AISI 1038 carbon steel is outlined in the following table.
|Sulfur, S||≤ 0.050|
|Phosphorous, P||≤ 0.040|
The physical properties of AISI 1038 carbon steel are tabulated below.
|Density||7.845 g/cm³||0.2834 lb/in³|
The following table shows mechanical properties of cold drawn AISI 1038 carbon steel.
|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|
|Elongation at break (in 50 mm)||12%||12%|
|Reduction of area||35%||35%|
|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|
The thermal properties of AISI 1038 carbon steel are given in the following table.
|Thermal conductivity||51.9 W/mK||360 BTU in/hr.ft².°F|
My charts say XC38 is equivalent to 1035, and XC48 to 1045. The caveat however, is the Cr, Ni, Mo content. XC38, for example, only lists maximums for those alloying elements. 1035 is equivalent on paper, 0% is definitely less than the respective .4%, .4%, and .1% maximums. I’d check with your customer before making the substitution – that .9% in there makes the difference between a simple carbon steel, and something verging on a low-alloy tool steel.
astm a194 grade 2h
Both my references give XC48==C45E, with is nominally 1045, or XC38==C35E.
With suffix E, the sulfur content is <0.035%.