PRODUCT SPECIFICATION

Alloy Steel Round Bar

Overview

High-performance steel formulated with chromium, molybdenum, or nickel. Designed for components requiring high tensile strength, toughness, and wear resistance under stress.

Key Features

Diameter: 9mm - 250mm
High Tensile Strength
Excellent Toughness
Heat Treatable

Available Grades

SCM415(H), SCM420(H), SCM435(H), SCM440(H)
SNCN220, SNCM439, SUP9, SUP9M
4140, 8620, 8620H, 6135, 6140, 6150
42CrMo4, 20MnV6, 35CrV, 40CrV

Common Applications

GearsHigh-strength BoltsAutomotive ComponentsTools

Grade Deep-Dives

SCM440

Cr-Mo alloy steel, 1000+ MPa after Q+T — equivalent to AISI 4140 / DIN 42CrMo4

View Details →SCM415

Low-carbon Cr-Mo case-hardening steel, surface 58–62 HRC after carburizing — equivalent to AISI 5115 / DIN 16MnCr5 / 18CrMo4 (1.7243)

View Details →SCM420

Cr-Mo case-hardening steel, higher core strength than SCM415 — equivalent to AISI 4120 / DIN 20MnCr5 / 20CrMo4 (1.7321)

View Details →SNCM220

Ni-Cr-Mo case-hardening steel, excellent core toughness and impact resistance — equivalent to AISI 8620

View Details →6140

Cr-V hand tool forging steel, HRC 40–48 after Q+T, ultra-low sulfur (S ≤0.004%) for fatigue life — near equivalent to SAE 6140 / GB 40CrV

View Details →6135

High-toughness Cr-V tool steel, HRC 34–42 after Q+T, superior impact resistance vs 6140 — for large-section forgings and impact tools

View Details →