SCM440 Alloy Steel Round Bar 42CRMO Round rod with heat treatment
Product Description
Standards | Designation |
---|---|
ASTM | B 473 |
Length | Diameter |
---|---|
100mm to 6000mm | 5mm to 500mm |
Type | Certification |
---|---|
SAE 4140 Alloy Round Bar | ISO 9001:2008 |
EN-1A, EN-3B, EN-8, EN-9, EN-16, EN-18, EN-19, EN-24, EN-29B, EN-31, EN-32B, EN-36, EN-36C, EN-42J, EN-45, EN-47, EN-48A, EN-100, EN-111, EN-202, EN-352, EN-353, EN-1117 Etc.
Min. % | Max % | ||||||||
Carbon | 0.36 | 0.44 | |||||||
Silicon | 0.10 | 0.40 | |||||||
Manganese | 0.65 | 1.10 | |||||||
Chromium | 0.75 | 1.20 | |||||||
Molybdenum | 0.15 | 0.35 | |||||||
Phosphorous | 0 | 0.04 | |||||||
Sulphur | 0 | 0.04 |
SAE 4140 Alloy Round Bar Physical Properties
DENSITY (G/CM 3) | 8.08 |
DENSITY (LB/IN 3) | 0.292 |
MELTING POINT (°C) | 1425 |
MELTING POINT (°F) | 2600 |
Mechanical Property Designation | R | S | S | *T | U | V | W | ||
Limited Ruling Section mm | 250 | 250 | 150 | 100 | 63 | 30 | 20 | ||
Tensile Strength Mpa | Min | 700 | 770 | 770 | 850 | 930 | 1000 | 1080 | |
Max | 850 | 930 | 930 | 1000 | 1080 | 1150 | 1230 | ||
0.2% Proof Stress Mpa | Min | 480 | 540 | 570 | 655 | 740 | 835 | 925 | |
Elongation on 5.65√S0 % | Min | 15 | 13 | 15 | 13 | 12 | 12 | 12 | |
Izod Impact J | Min | 34 | 27 | 54 | 54 | 47 | 47 | 40 | |
Charpy Impact J | Min | 28 | 22 | 50 | 50 | 42 | 42 | 35 | |
Hardness Brinell HB | Min | 201 | 233 | 233 | 248 | 269 | 293 | 311 | |
Max | 255 | 277 | 277 | 302 | 331 | 352 | 375 | ||
*Material stocked generally in condition T Check test certificate if critical for end use. |
JIS G4051 S20C Round Bar Chemical Composition
Grade | C | Si | Mn | P | S |
JIS G4051 S20C | 0.18-0.23 | 0.15-0.35 | 0.3-0.6 | ≤0.035 | ≤0.035 |
JIS G4051 S20C Round Bar Physical Properties
Physical Properties | Metric | Imperial |
Density | 7.85 g/cm3 | 0.284 lb/in3 |
JIS G4051 S20C Round Bar Mechanical Properties
Grade |
Delivery State | T.S. N/mm2 Min | Y.S. N/mm2 Min | A,% Min | Z,% Min | Hardness, (annealing or tempering) HB,max | Forging ratio | Grain Size (level) | Nonmetal ratio |
JIS G4051 S20C | Hot rolled, forged, or heat treatment | 410 | 245 | 25 | 55 | 156 | ≥ 4:1 | ≥ 6 | ≤ 2.0 |