T: +86-0731-85185770
E: enquiry@qilumetal.com
E: enquiry@qilumetal.com
No. 18 Xiangfu Middle Road,Yuhua District, Changsha City
 |
Grade: AISI 3135
AISI 3135 is a nickel-chromium structural alloy steel with carbon at 0.33%–0.38% for core strength, nickel (1.10%–1.40%) for toughness, and chromium (0.55%–0.75%) for enhanced hardenability and wear resistance. Manganese (0.60%–0.80%) and silicon (0.20%–0.35%) serve as deoxidizers and strengtheners. Sulfur and phosphorus are held below 0.040% to ensure purity. This balanced composition provides excellent hardenability and a favorable strength-toughness synergy, making it well-suited for mechanical components under moderate service loads.
| Quantity: | |
|---|---|
3135
Qilu
SAE 3135 (AISI 3135) is a nickel‑chromium alloy steel grade, cross‑referenced to DIN 36NiCr6 and Mat. No. 1.5710. Thanks to balanced carbon, chromium and nickel contents, 3135 alloy steel delivers deep hardenability, high tensile strength and solid low‑temperature impact toughness after quenching & tempering treatment.
This alloy shows temper brittleness risk and limited weldability, so it is mostly applied under quenched‑and‑tempered condition. We supply hot‑rolled, cold‑drawn and forged 3135 steel bars in round, square and flat shapes, with full mill test certificates (MTC) for industrial traceability.
Grade | C | Si | Mn | P | S | Cr | Ni |
3135 | 0.33-0.38 | 0.20-0.35 | 0.60-0.80 | 0.040Max | 0.040Max | 0.55-0.75 | 1.10-1.40 |
| Property | Value |
| Yield Strength (Rp0.2) | ≥ 662 MPa |
| Tensile Strength (Rm) | ≥ 566 MPa |
| Elongation (A) | ≥ 21% |
| Reduction of Area (Z) | ≥ 31% |
| Brinell Hardness (HBW) | ~143 |
| Impact Toughness (KV/Ku) | 34 J |
Forging temperature: 850‑1100°C.
Normalizing: 870‑900°C, air cool.
Quenching: 840‑870°C, oil quenching recommended (avoid direct water quenching to prevent cracking).
Tempering: 500‑650°C, air cool; watch out for temper brittleness risk.
Product type | Size range | Length |
Cold drawn bar | Φ3-Φ80mm | 6000-9000mm |
Hot rolled bar | Φ16-Φ310mm | 6000-9000mm |
Hot forged bar | Φ100-Φ1200mm | 3000-5800mm |
Hot rolled plate/sheet | T:3-200mm; W:1500-2500mm | 2000-5800mm |
Hot Forged block | T: 80-800mm; W: 100-2500mm | 2000-5800mm |
Surface Finish | Turned | Milled | Grinding(Best) | Polished(Best) | Peeled(Best) | Black Forged | Black Rolled |
Tolerance | +0/+3mm | +0/+3mm | +0/+0.05mm | +0/+0.05mm | +0/+0.1mm | +0/+5mm | +0/+1mm |
Straighness | 1mm/1000mm max. | 3mm/1000mm max. | |||||
AISI 3135 alloy steel is widely used for heavy‑duty mechanical components requiring high strength and impact resistance:
Heavy‑load transmission shafts, rotor shafts
Connecting rods, crankshaft parts, large‑size quenched‑and‑tempered forgings
High‑strength bolts, studs, pins and axle components
Machinery, general engineering and heavy equipment industry
A1: SAE 3135 nickel‑chromium alloy steel serves heavy‑load shafts, connecting rods, high‑strength bolts and large quenched‑tempered forgings where good toughness and hardenability are required.
A2: Both are alloy steels, but 3135 contains nickel (1.10%–1.40%) for superior toughness, while 4130 contains molybdenum (0.15%–0.25%) for better high-temperature strength and temper resistance. 3135 performs better under low-temperature impact conditions, whereas 4130 is preferred for high-temperature pressure applications.
A3: 3135 is Ni‑Cr alloy steel, while 4135 belongs to Cr‑Mo series. 3135 offers better low‑temperature toughness, whereas 4135 shows improved tempering stability with molybdenum addition.
A4: Temper brittleness of 3135 mainly occurs when cooling slowly between 350℃‑500℃ after tempering, which drops impact toughness sharply. To avoid this issue, adopt fast air‑cooling or oil‑cooling right after tempering. Do not hold workpieces for long periods inside this brittle temperature range, especially for parts with high toughness requirements.
For 3135 material test certificates, custom processing, or pricing inquiries, please contact our technical sales team. We look forward to working with you to find the optimal material solution for your application.
