Steel 37HS alloy structural steel, chromium-silicon – steel for heat treatment PN-89/H-84030/04 , 38ХС, 38ChS, 38KHS, 40ХС, 40ChS, 40KHS, 14341 38CrSi, A21382
Materials available at Alfa-Tech 37HS / 38ХС
37HS / 38XC bars – hot rolled, peeled and drawn
Flat bars 37HS / 38ХС
Forged bars 37HS / 38ХС
37HS / 38XC forgings – free-form, forged cubes and shafts
37HS / 38XC sheets – hot rolled
Phone: +48 63 2610519
kontakt@alfa-tech.com.pl
Comparison of the chemical composition of 37HS steel with its counterparts 38KHS, 38XC, 38ChS, 40XC, 40KHS, 14341, 38CrSi, A21382
| Type steel | Norma | Chemical composition (%) | |||||||||
| C | Mn | Si | P | S | Cu | Cr | Ni | Mo | other | ||
| 37HS | PN | 0,34 0,42 | 0,30 0,60 | 1,00 1,40 | Max 0,035 | Max 0,035 | Max 0,30 | 1,30 1,60 | max 0,30 | | |
| 38ХС 38ChS 38KHS | GOST 4543-71 | 0,34 0,42 | 0,30 0,60 | 1,00 1,40 | Max 0,035 | Max 0,035 | Max 0,30 | 1,30 1,60 | Max 0,30 | Max 0,15 | V max 0,05 Ti max 0,03 W max 0,20 N max 0,008 |
| 40ХС 40ChS 40KHS | GOST 4543-71 | 0,37 0,45 | 0,30 0,60 | 1,20 1,60 | Max 0,035 | Max 0,035 | Max 0,30 | 1,30 1,60 | Max 0,30 | Max 0,15 | V max 0,05 Ti max 0,03 W max 0,20 N max 0,008 |
| 38ChS | BDS | 0,34 0,42 | 0,30 0,60 | 1,00 1,40 | Max 0,035 | Max 0,035 | Max 0,30 | 1,30 1,60 | Max 0,30 | Max 0,15 | V max 0,05 Ti max 0,03 W max 0,20 |
| 14 341 14341 | CSN/STN | 0,34 0,42 | 0,30 0,60 | 1,00 1,40 | Max 0,035 | Max 0,035 | Max 0,30 | 1,30 1,60 | Max 0,30 | ||
| 38CrSi A21382 | GB / T | 0,35 0,43 | 0,30 0,60 | 1,00 1,30 | Max 0,035 | Max 0,035 | Max 0,30 | 1,30 1,60 | Max 0,30 | Max 0,15 | |
37HS tempering steel – application, processing, properties
Grade 37HS is used in the construction of heavy and medium-sized machinery, for screws, journals, shafts, axles, and other parts subject to torsional stress, as well as for small parts in automotive and tractor construction subject to high alternating loads. It is also used for parts subject to high wear, such as cams, guide rods, clutch discs, friction discs, and even the intake valves of some tractors. After low tempering, 37HS steel can also be used for spring-loaded parts requiring high strength and wear resistance.
Welding 37HS
37HS steel has poor weldability. Welding is only possible in exceptional cases, preferably after soft annealing. Before welding, the steel should be heated to temperatures depending on the thickness of the parts being joined.
Preheating temperature (°C) at thickness
-up to 15 mm 150-250oC
-over 15 to 25 mm 200-300oC
-over 25 mm 250-350oC
Lower temperatures can be used when welding steels with C e min values and thicknesses at the lower end of the ranges, and at high welding currents. When welding large or thicker parts, it is recommended to use an intermediate stress-relieving anneal. Immediately after welding and before cooling below the specified temperatures, it is recommended to soft-anneal or heat-treat the joint.
If heat treatment cannot be performed immediately after welding, the joint should be cooled very slowly to ambient temperature, for example, together with the furnace or after removal from the furnace, covered with asbestos mats or high-temperature fabric, or cooled in hot sand. Arc welding can be performed with coated electrodes or in a carbon dioxide shield. When joining non-heat-affected parts, areas with lower strength properties than the steel being joined will occur in the heat-affected zones of the welding process. Restoring the proper properties in these zones depends on the heat treatment applied.
Welding
37HS steel can be welded electrically, by resistance, or by friction. For resistance welding, optimal parameters should be selected within narrower ranges than those used for welding low-carbon steels. The steel can be welded in the quenched and tempered or soft-annealed condition. The resulting joints can have mechanical properties similar to those of steel welded without or after heat treatment.
Cutting
37HS steel can be cut with an oxy-acetylene or propane-butane flame, or with an arc plasma jet. Before cutting, the steel should be preheated to a temperature of 250-300 ° C. Cut surfaces should be cooled in still air. This steel grade is used in the heat-treated condition. The medium hardenability of this steel allows for the best mechanical properties in sections up to approximately 60 mm thick when quenched in oil. The steel is prone to brittleness after tempering.
Steel for heat treatment 37HS, 38XC – mechanical properties of steel
Tensile strength Rm min 930 MPa
Yield strength Re (Rp 0,2) min 740 MPa
Elongation A min 12%
Z-narrowing min 50%
Breaking work KU2 min 56 J
Hardness in softened state max 255 HB
We can supply 37HS steel or equivalent (38ХС, 38ChS, 38KHS, 40ХС, 40ChS, 40KHS, 38ChS, 14341, 38CrSi, A21382) as round rolled bars, open-die forgings, square bars, flat bars, plates, cubes, discs, rings.
See other grades for heat treatment
12HN3A - chrome-nickel steel 1.5752,15CrNi13
20HN3A - chrome-nickel steel
30HGSA - chromium-manganese-silicon hardening steel 30HGS, 35HGS, 35HGSA
30HGSNA - chrome-manganese-silicon-nickel steel
30H2N2M - chrome-nickel-molybdenum steel 30CrNiMo8, 1.6580
36HNM/38HNM - chrome-nickel-molybdenum steel 36CrNiMo4, 1.6510, 36NiCrMo16, 39NiCrMo3, 1.6511
37HS – chromium-silicon structural steel for hardening 38XC, 38ChS, 38KHS, 40XC, 40ChS, 40KHS, 38ChS, 14341, 38CrSi, A21382
40H2MF - chrome-molybdenum-vanadium steel
40HNMA - chrome-nickel-molybdenum steel AISI 4340, 1.6565, 40NiCrmo6, 40NiCrMo7
45HN - chrome-nickel structural steel for hardening
45HNMF / 45HNMFA - chromium-nickel-molybdenum-vanadium steel
Other structural alloy steels
structural alloy carburizing steel
structural alloy steel for nitriding
structural alloy spring steel
structural alloy bearing steels
structural alloy steel for heat treatment
alloy structural steel for operation at elevated temperatures – boiler steel