Carbon and alloy steels form the backbone of precision manufacturing across countless industries. These iron-based materials gain their versatility through carefully controlled carbon content and strategic alloying additions. By adjusting composition, manufacturers can dial in specific properties-from exceptional machinability to superior strength and wear resistance.

Understanding Carbon & Alloy Steel Composition

Carbon content fundamentally determines a steel’s characteristics. Low carbon steels (under 0.25% carbon) offer excellent formability and weldability. Medium carbon grades (0.25-0.60%) provide a balance of strength and machinability. High carbon steels (0.60-1.00%) deliver maximum hardness and wear resistance when heat treated.

Alloying elements further refine performance:
  • Chromium – enhances hardenability and wear resistance
  • Nickel – improves toughness and impact strength
  • Molybdenum – increases high-temperature strength and creep resistance
  • Vanadium – refines grain structure for improved toughness
  • Manganese – increases hardenability and tensile strength
  • Sulfur – improves chip formation and tool life in free-machining grades

Industries We Serve

  • Hydraulic & Pneumatic Systems – Precision-ground steel rods for hydraulic cylinders, actuator shafts, and valve components require exceptional straightness and surface finish. Materials like 1045, 4140, and chrome-plated variants ensure reliable performance under high pressures and cyclic loading.
  • Aerospace & Defense – Aircraft landing gear components, structural fasteners, and high-stress fittings demand materials like 4340, 9310, and vacuum-melted grades that offer superior cleanliness, fatigue resistance, and predictable heat treatment response. These applications cannot tolerate material inconsistencies.
  • Automotive & Racing – Drive shafts, axles, transmission components, and engine parts benefit from alloy steels like 8620 (for carburizing), 52100 (for bearing races), and specialty grades like Fatigue Proof® that resist cyclic loading failure.
  • Industrial Machinery – Machine tool spindles, precision shafts, gears, and wear
    components utilize materials ranging from free-machining 12L14 for high-volume production to case-hardening grades like 8620 and 4620 for components requiring hard surfaces with tough cores.
  • Oil & Gas – Downhole tools, valve stems, and drilling components operate in corrosive, high-stress environments. Alloy steels like 4330 and Nitralloy provide the strength and fatigue resistance these demanding applications require.
  • Power Generation – Turbine shafts, generator components, and fasteners exposed to elevated temperatures benefit from molybdenum-containing alloys like 4340 and 8740 that maintain strength at temperature.

Material Selection

Centerless Products processes a comprehensive range of carbon and alloy steels through our precision grinding, polishing, straightening, cutting, and blanking operations.

Carbon Steels

GRADESPECIFICATIONS
A36UNS K02600, ASTM A36, ASTM A29
1018UNS G10180, ASTM A29, ASTM A108
1020UNS G10200, ASTM A29, ASTM A108
1022UNS G10220, ASTM A29, ASTM A108
1035UNS G10350, ASTM A29, ASTM A108
1045UNS G10450, ASTM A29, ASTM A108
1050UNS G10500, ASTM A29, ASTM A108
1060UNS G10600, ASTM A29, ASTM A108
1095UNS G10950, ASTM A29, ASTM A108
A513-T5 DOM TUBEC1020/C1026 ASTM ASTM A513-TYPE 5 ( Drawn-over-mandrel tubing )
A519 CDS TUBEC1018/1026 ASTM A519 ( Cold-drawn seamless tubing )
1117UNS G11170, ASTM A29, ASTM A108
1144 STRESSPROOF®UNS G11440 ASTM A29, ASTM A108, ASTM A311 CL B
1144 FATIGUEPROOF®UNS G11440 ASTM A29, ASTM A108, ASTM A311 CL B
12L14UNS G12144, ASTM A29, ASTM 108
1215UNS G12150, ASTM A29, ASTM A108

Aircraft Alloy Steels

GRADESPECIFICATIONS
4130 NORMUNS G41300, AMS 6348, AMS 6370, AMS 6528, AMS 2301, AMS 2304
4130 HT COND F4UNS G41300, AMA 6346, AMS 6758, AMS 2301, AMS 2304
4130 SMLS TUBEUNS G41300, AMS 6371, AMS 6360, AMS 2301
4140 ANN4140 ANN UNS G41400, AMS 6382, AMS 6529, AMS 6349, AMS 5626, AMS 2301, AMS 2304
4140 NORMUNS G41400, AMS 6382, AMS 6529, AMS 6528, AMS 6349, AMS 2301, AMS 2304
B7UNS G41400, ASTM A193 GRADE 7, ASTM A434 CLASS BC
B16UNS G41400, ASTM A193 CLASS B16, ASTM A29, ASTM A108
4330V MOD VMUNS K23080, AMS 6411, AMS 6427, BMS-7-122, BMS-7-27, AMS 2300, CE-0906
4340 N&T AQUNS G43400, AMS 6409, AMS 6415, AMS 6484, AMS 2301, AMS 2304, ASTM A322
4340MOD / 300MUNS K44220, AMS 6417, AMS 6419, AMS 6257, AMS 2300, BMS-7-26 CL 1, CE-0896
4340 VM N&TUNS G43406, AMS 6414, AMS 6415, AMS 6484, AMS-S-5000, BMS-7-28
4620 VMUNS G46200, AMS 6294, MIL-S-7493, AMS 2300, ASTM A331
52100 VM SPH ANNUNS G52986, AMS 6440, AMS 6444, AMS 2300, AMS-S-7420
6150 VM ANNUNS G61500, AMS 6448, AMS 2300, AMS-S-8503, ASTM A322, ASTM A331
8740 AQ ANNUNS G87400, AMS 6322, AMS 2301, AMS 2304, AMS-S-6049, ASTM A331
9310 VM N&TUNS G93106, AMS 6260, AMS 6265, AMS 6267, AMS 2300, AMS 2301, AMS 2304, ASTM A322
H11 VM N&TUNS T20811, AMS 6485, AMS 6487, AMS 6488
NITRIDING 135 MODUNS K24065, AMS 6470, AMS 6471, AMS 6472, AMS 2301, AMS 2304, AMS-S-6709

Your Partner for Critical Applications – Precision Grinding with Consistent Results

Our centerless grinding capabilities ensure your steel components meet tight dimensional tolerances and surface finish requirements. We control diameter to ±0.00004″ (2µm), maintain excellent roundness and straightness, and achieve surface finishes suitable for bearing surfaces, hydraulic applications, and precision assemblies.

Whether you’re producing high-volume hydraulic rods, aerospace shafts, or specialized machine components, Centerless Products delivers the material consistency and dimensional accuracy your manufacturing process demands. Contact us today to discuss your needs.