What Are Martensitic Blow Bars?

Martensitic blow bars (also called martensitic impact hammers) are important parts installed on the rotor of horizontal shaft impact crushers.

When the crusher runs, the rotor spins fast. The blow bars hit rocks, construction waste, or medium-hard ores, and throw them against the impact plates. This breaks the material into smaller pieces during secondary or tertiary crushing.

Because blow bars touch the raw materials directly, they suffer from constant impact and rubbing. If they wear out, the crusher’s output drops, the final particle size becomes uneven, and the machine may need to stop often. Martensitic blow bars offer a middle choice – they are tougher than brittle high‑chrome bars, and more wear‑resistant than tough manganese bars. This gives you a good balance for many jobs.

Why Choose Martensitic Steel Blow Bars?

Martensitic steel is a balanced material. It has special advantages over manganese or high‑chrome steel:

• Good balance of hardness and toughness
  After heat treatment, its hardness stays stable at 44–57 HRC. It does not depend on impact to harden (like manganese steel). At the same time, it is much less likely to crack than high‑chrome blow bars, even when hitting unexpected steel or very large stones.

• Longer life in abrasive conditions
  Compared with manganese blow bars, martensitic steel resists wear better. For medium‑abrasive materials, it lasts longer, so you need to replace parts less often.

• Works well in many situations
  It is suitable for secondary crushing, construction waste recycling, and processing blasted limestone. It covers most medium‑load quarry and recycling projects.

• Upgraded MC series with ceramics
  Our R&D team has developed titanium‑carbide‑reinforced martensitic blow bars. Under the same working conditions, these MC series bars last 200%–300% longer than standard martensitic bars.

Best Situations to Use Martensitic Blow Bars

• Recycling construction waste, concrete, and asphalt

• Processing blasted limestone and medium‑hard aggregate

• Secondary and tertiary crushing stages

• Sites where small amounts of tramp iron (like rebar or steel blocks) may appear

• Materials with medium feed size and moderate abrasiveness

Compatible Crusher Brands and Models

Our martensitic blow bars fit all major horizontal impact crusher brands. No modification is needed during installation. They work with:

• Metso Nordberg NP series (NP13, NP15, NP20, NP1110, NP1213, NP1313, NP1315, NP1415, NP1520, NP1620, NP2023, and Lokotrack mobile units)

• Sandvik QI mobile series (QI341, QI442, QI353)

• Terex (Pegson 428, 4242, 4242SR, 1412 Trakpactor; Powerscreen Trakpactor 260SR, 320SR, 550SR; Finlay I‑130, I‑140RS)

• Hazemag (APK30, APK40, APK50, APK60, APK70, AP‑K1313, APS‑1313, APS‑1515, HSI1007, HPI‑H1214)

• Kleemann MOBIREX (MR100 NEO, MR110 EVO2, MR110i EVO2, MR122 Z, MR130 EVO2, MR130i EVO2, MR130 PRO, MR150 Z, MR170 Z)

• SBM PF series (PF1007, PF1210, PF1214, PF1315, PF1320)

• We also make custom bars based on your drawings, OEM part numbers, or samples.

About Saikuang Casting 

Saikuang Casting is a professional foundry that makes wear‑resistant parts. We have solid experience in producing full‑series impact crusher parts, including standard martensitic blow bars and MC series ceramic‑composite bars.

Our Advantages

• Many steel grades available – We offer 30Mn2CrSi, 30CrMnSiMo, 30CrNiMo, 40CrNiMo, 42Cr2Si2MnMo, 45Cr2Mo, 30Cr5Mo, 40Cr5Mo, 50Cr5Mo, 60Cr5Mo. We can also adjust the chemical composition for your specific conditions.

• Strict heat treatment – Every batch is quenched and tempered precisely to form a stable martensitic structure, giving uniform hardness (44–57 HRC) and impact strength of 100–300 J/cm².

• Exact 1:1 size match – Our mold library covers all mainstream crusher models. All bars have the same dimensions as original parts, so replacement is quick and easy.

• Rigorous quality inspection – We test every batch for metallographic structure, hardness, and impact resistance, and we provide full reports for traceability.

• Flexible customization – We accept orders based on your crusher model, OEM number, drawings, or physical samples.

Other Crusher Wear Parts We Supply

Besides martensitic blow bars and impact crusher parts (impact plates, apron liners, rotor protectors), Saikuang Casting also makes a full range of cone crusher spare parts for mining, quarrying, and recycling:

• Transmission parts: drive gear, pinion

• Cone wear liners: mantle, concave bowl liner

• VSI sand maker rotor parts: rotor tips, feed eye ring, distributor plate

• Bushings, thrust plates, adjustment rings, locking bolt assemblies, and other mechanical parts

Contact Us

We serve customers worldwide in aggregate quarries, mining, cement production, and construction waste recycling. If you need durable martensitic blow bars or any impact & cone crusher parts, please send us your crusher model, OEM part number, or technical drawings. We will give you a competitive price, and our engineering team will offer the right wear‑part solution quickly.

Your Reliable Partner for Crusher Spare Parts

Email: infosk@skpremiumcasting.com

Tel: 0086-17351780508